Vendor & SKU directory
The human-facing index of every manufacturer and SKU the wiki has run into for hydrogen sensing: 112 vendors, 209 products (167 with specs verified against a datasheet, 172 with a datasheet link). Each product links to the modality page that explains how it works.
How to add hardware
Section titled “How to add hardware”When you run into a new sensor, instrument, or component:
- Add or extend a YAML under
src/data/vendors/<vendor-slug>.yaml, followingdocs/templates/vendor-schema.md. One file per vendor — if the vendor exists, append the new SKU to itsproducts:list. - Re-run
python3 ops/generate-vendors.pyto rebuild this page, thennpm run build. - Optionally add a row to the relevant modality page’s Vendors & products table for in-context discovery.
Only record vendors, products, and specs that appear in a research dossier or a real datasheet. Carry over any (unverified) flags; do not invent SKUs, prices, or specs. Price classes: $ <$100, $$ $100–1k, $$$ $1k–10k, $$$$ >$10k, unknown. A ✓ marks specs taken from a manufacturer datasheet.
Electrochemical cells
Section titled “Electrochemical cells”| Vendor | Product / SKU | Key specs | Price | Datasheet | Modality |
|---|---|---|---|---|---|
| Alphasense | H2-AF — A-series portable H₂ sensor | 0–2000 ppm warranted; 10–40 nA/ppm @400 ppm/23°C; T90 <35 s; zero ±15 ppm; <0.7 ppm RMS noise; zero drift <20 ppm/yr; >24 mo life; −30…+50 °C; 80–120 kPa; 15–90% RH; CO <2% @400 ppm ✓ | $$ | datasheet | page |
| Alphasense | H2-BF — B-series H₂ sensor | 0–5000 ppm warranted (20,000 ppm overgas); 10–25 nA/ppm @400 ppm; T90 <55 s; zero <±15 ppm; <0.8 ppm RMS noise; zero drift <10 ppm/yr; >24 mo life; −30…+50 °C; 15–90% RH; CO <2% @400 ppm ✓ | $$ | datasheet | page |
| DD-Scientific | DceL H2-1000 — DceL miniature electrochemical H₂ sensor, low range | 0–1000 ppm; 20±10 nA/ppm; T90 <40 s (typ. <25 s); 0 V bias; 3-pin low-profile package, interchangeable with 4-series; 12-mo warranty; low CO cross-sensitivity ✓ | $ | datasheet | page |
| DD-Scientific | GS+4H2-CO 1000 — GS+4H2-CO electrochemical H₂ sensor, 4-series, low CO cross-sensitivity | 0–1000 ppm; 20±10 nA/ppm; T90 <40 s (typ. <25 s); 0 V bias; 12-mo warranty; low CO cross-sensitivity; 4-series pin-compatible ✓ | $ | datasheet | page |
| DD-Scientific | GS+4H2-CO 5% — GS+4H2-CO electrochemical H₂ sensor, 4-series, extended range 0–5 vol% | 0–50,000 ppm (0–5 vol%); 0.5±0.25 nA/ppm; T90 <40 s (typ. <20 s); 0 V bias; 4-series 3-pin; 12-mo warranty; low CO cross-sensitivity ✓ | $ | datasheet | page |
| DD-Scientific | GS+4H2-CO 5000 — GS+4H2-CO electrochemical H₂ sensor, 4-series, high range, low CO cross-sensitivity | 0–5000 ppm; 10±5 nA/ppm; T90 <40 s (typ. <25 s); 0 V bias; 4-series 3-pin; 12-mo warranty; low CO cross-sensitivity ✓ | $ | datasheet | page |
| DD-Scientific | GS+7H2 — GS+7H2 electrochemical H₂ sensor, 7-series | 0–1000 ppm; 20±10 nA/ppm; T90 <90 s; 0 V bias; 12-mo warranty; low CO cross-sensitivity marketed; fixed-installation 7-series package ✓ | $$ | datasheet | page |
| Dräger | CatEx 125 PR (PN 6812950) — DrägerSensor CatEx catalytic sensing head | 0–100 %LEL / 0–100 vol% CH₄; res 1 %LEL / 1 vol%; methane→nonane certified; new PR pellistor composition vs H₂S & silicone poisoning; lead-free; for X-am 2500/5000/8000 ✓ | $$$ | datasheet | page |
| Dräger | X-am 8000 — X-am 8000 portable multi-gas (XXS H2 HC) | 1–7 gas detector; internal pump option (hose ≤45 m); configurable EC (XXS), IR, PID, and CatEx 125 PR sensor slots; inductive charging; IP-rated; H₂ via XXS H2 HC (0–4 vol%) ✓ | $$$ | datasheet | page |
| Dräger | XXS H2 (PN 6812370) — XXS H₂ electrochemical sensor, low concentration (X-am 5000/5600/8000) | 0–2000 ppm; 6-month calibration interval; 1-yr warranty; miniature electrochemical XXS package; for Dräger Pac, X-am 5000/5600/8000 ✓ | $$$ | datasheet | page |
| Dräger | XXS H2 HC (PN 6812025) — XXS H₂ electrochemical sensor, high concentration | 0–4 vol% (0–40,000 ppm); 5 ppm resolution; 1-yr warranty; miniature XXS package; used in X-am 8000 for 0–100% LEL H₂ readings ✓ | $$$ | datasheet | page |
| EC Sense | 01-ES4-H2-5000-01 — ES4-H2-5000 solid-polymer-electrolyte H₂ sensor element | 0–5000 ppm (20,000 ppm overload); 3±2 nA/ppm; T50 <10 s, T90 <30 s; 1 ppm resolution (16-bit ADC); 0 mV bias; -40…+55°C, 15–95% RH; >5 yr life; <5%/yr drift ✓ | $$ | datasheet | page |
| EC Sense | 04-TB200B-ES4-H2-5000-01 — TB200B-ES4 smart H₂ sensor module (UART/I²C) | 0–5000 ppm, 1 ppm resolution; T50 <10 s, T90 <30 s; onboard T/RH sensing; UART (TTL 3.3V) or I²C output; 3.3–5.5 V, <5 mA (40 mW); sleep mode; -40…+55°C, 15–95% RH; >5 yr life; 12-mo warranty ✓ | $$ | datasheet | page |
| Honeywell | 4HYT — 4-Series electrochemical H₂ sensor (City Technology) | 0–1000 ppm H₂ (2000 ppm overload); 15±10 nA/ppm; resolution 2 ppm; T90 <90 s; drift <2%/mo; −20 to +50 °C; 2-yr life in air ✓ | $$ | datasheet | page |
| Honeywell | CAT25 / CAT16 — CiTipeL CAT catalytic bead series | T90 < 10 s (CH₄); 230 mW max; life > 2 yr; span drift < ±2 %LEL CH₄/yr; some HMDS/H₂S poison resistance; H₂ relative sensitivity 107 (CH₄=100) ✓ | $$ | datasheet | page |
| Honeywell | Hydrogen Leak Detector (HLD, 2025) — Portable TCD hydrogen leak detector | TCD; 0–4% H₂ (0–40,000 ppm); 50 ppm resolution; ±10% accuracy (−40 to 65 °C); T90 <2 s; startup <1 s; CAN J1939, 250 kBaud; −40 to 85 °C; IP67; 16 mA @12 V ✓ | $$ | datasheet | page |
| Membrapor | H2/C-20000 — H2 sensor, compact housing, 50% LEL | 0–20,000 ppm (40,000 ppm overload, 50% LEL H₂); 6±4 nA/ppm; T90 <45 s; <8.4 ppm resolution; CO cross-sens. ~60–80%; −40…+50 °C ✓ | $$ | datasheet | page |
| Membrapor | H2/C-40000 — H2 sensor, compact housing, 100% LEL | 0–40,000 ppm (80,000 ppm overload, 100% LEL H₂); 4±3 nA/ppm; T90 <45 s; <12.5 ppm resolution; CO cross-sens. <100%; −40…+50 °C; safety/process control ✓ | $$ | datasheet | page |
| Membrapor | H2/C-5000 — H2 sensor, compact housing, mid-range | 0–5000 ppm (10,000 ppm overload); 9±2 nA/ppm; T90 <45 s; <5.3 ppm resolution; CO cross-sens. ~60–80%; −40…+50 °C; 15–90% RH ✓ | $$ | datasheet | page |
| Membrapor | H2/CA-1000 — H2 sensor, compact housing, CO-filtered | 0–1000 ppm (2000 ppm overload); 28±11 nA/ppm; T90 <40 s; <1.8 ppm resolution; inboard CO filter (600 ppm CO → <18 ppm reading); zero drift <15%/yr; −40…+50 °C; 15–90% RH; 3–5 yr life ✓ | $$ | datasheet | page |
| Membrapor | H2/CT-40000 — H2 sensor, compact housing, high-humidity/biogas | 0–40,000 ppm (50,000 ppm overload, 100% LEL H₂); 4±3 nA/ppm; T90 <45 s; rated to 50–95% RH (biogas/high-humidity duty); −40…+50 °C ✓ | $$ | datasheet | page |
| Membrapor | H2/M-1000 — H2 sensor, miniature housing | 0–1000 ppm (2000 ppm overload); 25±10 nA/ppm; T90 <35 s; <2.0 ppm resolution; no CO filter (CO cross-sens. ~60–80%); zero shift 18 ppm; −40…+50 °C; 5.5 g; portable-device form factor ✓ | $$ | datasheet | page |
| Membrapor | H2/M-40000 — H2 sensor, miniature housing, 100% LEL | 0–40,000 ppm (100% LEL H₂); 5±3 nA/ppm; T90 <50 s; <10.0 ppm resolution; zero shift 100 ppm; −40…+50 °C; 5.5 g; portable-device form factor ✓ | $$ | datasheet | page |
| Membrapor | H2/S-10000-S — H2 sensor, standard housing, 3-electrode, mid-high range | 0–10,000 ppm (20,000 ppm overload); 6±4 nA/ppm; T90 <45 s; <8.4 ppm resolution; 3-electrode; CO cross-sens. ~60–80%; zero drift <15%/yr; −40…+50 °C; 15–90% RH; 3–5 yr life ✓ | $$ | datasheet | page |
| SemeaTech | 4H2-1000A — 4-Series electrochemical H₂ sensor, interference-resistant (PN 054-S000-000) | 0–1000 ppm (2000 ppm overload); 0.02±0.01 µA/ppm; T90 ≤70 s; 0.2 ppm resolution; CO cross-sensitivity eliminated (50 ppm CO → 0 ppm equiv.); -20…50°C, 15–90% RH; 2 yr life; pin-to-pin 4-series replacement ✓ | $ | datasheet | page |
| SemeaTech | 4H2-40000 — 4-Series electrochemical H₂ sensor, high range (PN 054-0100-000) | 0–40,000 ppm; 0.010±0.003 µA/ppm; T90 ≤70 s; 5 ppm resolution; 500 ppm CO → 120 ppm H2-equiv. (not interference-resistant); -20…50°C, 20–90% RH; 2 yr life; pin-to-pin 4-series replacement ✓ | $ | datasheet | page |
| SemeaTech | 7H2-10000 — 7-Series electrochemical H₂ sensor (PN 054-0300-000) | 0–10,000 ppm (20,000 ppm overload); 0.006±0.003 µA/ppm; T90 ≤110 s; 10 ppm resolution; 50 ppm CO → 200 ppm H2-equiv.; -20…50°C, 15–90% RH; 2 yr life; pin-to-pin 7-series replacement ✓ | $ | datasheet | page |
| SGX Sensortech | EC4-1000-H2 — Hydrogen electrochemical sensor | 0–1000 ppm (2000 ppm overload); 10–30 nA/ppm H₂; zero <±20 ppm; resolution 10 ppm; T90 <70 s; drift <2%/mo; −20 to +50 °C; 2-yr warranty; 0 V applied potential ✓ | $ | datasheet | page |
| SGX Sensortech | MP-7217 (VQ548MP) — MEMS Pellistor | T90 < 12 s; 110–140 mW cont., <5–10 mW pulsed; −40/+60 °C op (+75 °C cert.); Ø14 mm, 1 g ✓ | $ | datasheet | page |
| SGX Sensortech | MiCS-2714 — MiCS-27xx MEMS MOX | H₂/NO₂; 50 ppb–5 ppm; −30 to 85 °C ✓ | $ | datasheet | page |
| SGX Sensortech | MiCS-5524 — MiCS-55xx MEMS MOX | H₂ secondary channel (CO/methane-primary); indoor CO/gas-leak combo part ✓ | $ | datasheet | page |
| SGX Sensortech | MiCS-5914 — MiCS-59xx MEMS MOX | H₂ 1–1000 ppm; R₀(air) 10–1500 kΩ; sensitivity factor 1.5–15; discontinued generation; ≈$6.24–6.74 ✓ | $ | datasheet | page |
| SGX Sensortech | SGX-BLD1 — Hydrogen & Battery Leakage Detection sensor (automotive TC module) | Thermal-conductivity principle (not FET); 0–10% H₂; ±0.4 vol% (≤4%H₂)/±10% (≥4%H₂); T90 <1 s; <25 mA @ 9–18 V; CAN 500 kbps; IP6K7; −40 to +85 °C; ≥10-yr/13,000 h life ✓ | $$ | datasheet | page |
| SGX Sensortech | TC-1326-A / TC-1326-AS — MEMS thermal-conductivity sensor elements | 0–100 vol% H₂/methane; 5 mV/%H₂ min. sensitivity; heat-up <100 ms, cycled avg <15 mW; dual 5×5×2 mm package; op/storage −40 to +125 °C; no catalytic poisoning, O₂-independent ✓ | $ | datasheet | page |
| SGX Sensortech | VQ21T / VQ21TB / VQ21TSB — VQ21 Series high-power poison-resistant catalytic pellistor | Flammable gases incl. H₂; 0.1–5% CH₄ (0–100% LEL); min sensitivity 15 mV/%; 2.0±0.1 V bridge, 300 mA typ., 750 mW max; T50 2 s; linear to 3% CH₄; −40 to +70 °C; >5-yr life; highly silicone/poison-resistant (orders of magnitude vs VQ1); TB/TSB add poison filters/thread mounts ✓ | $ | datasheet | page |
| SGX Sensortech | VQ548ZD / VQ549ZD / VQ547TS / VQ546M — VQ500 series catalytic bead / TCD | T90 < 20 s; 135–230 mW; −40 to +55 °C; ATEX/IECEx/CSA/UL; VQ546M/MR TCD %v/v; bare element ≈ US$30 (VQ548ZD-S) ✓ | $ | datasheet | page |
| Winsen Electronics | MC105 — MC105 catalytic bead sensor | 0–100% LEL; 1% CH4 → 20–50 mV, 1% C3H8 → 30–70 mV; T90 ≤10 s, recovery ≤30 s; 2.5±0.1 V, 150±10 mA; 5-yr life; -40…+70°C <95% RH; H2S/organosilicone resistant ✓ | $ | datasheet | page |
| Winsen Electronics | ME3-H2 — ME3-series electrochemical H₂ sensor | 0–1000 ppm (2000 ppm max); 10.8±5.2 nA/ppm; T90 ≤90 s; 2 ppm resolution; zero drift ≤20 ppm (-20…40°C); 2 yr life; -20…50°C, 15–90% RH; 10Ω load ✓ | $ | datasheet | page |
| Winsen Electronics | ME4-H2 — ME4-series electrochemical H₂ sensor | 0–1000 ppm (2000 ppm max); (0.03±0.01) µA/ppm; T90 ≤30 s; 1 ppm resolution; zero drift ≤10 ppm (-20…40°C); 2 yr life; -20…50°C, 15–90% RH ✓ | $ | datasheet | page |
| Winsen Electronics | MQ-8 — MQ-8 SnO₂ Taguchi-type H₂ sensor | 100–1000 ppm H₂; SnO₂ bead, sensitivity Rs(air)/Rs(1000ppm H2)≥5; heater 5.0±0.1V, ≤950 mW; loop ≤24V DC; 10-yr claimed lifespan; preheat >48 h ✓ | $ | datasheet | page |
| Winsen Electronics | ZE03-H2 — ZE03 electrochemical H₂ module | 0–1000 ppm; onboard µC, UART + analog output; DC 3.7–9 V, <5 mA; >1 yr working life; 0–50°C, 20–90% RH; ø23.5×24.5 mm ✓ | $ | datasheet | page |
| Winsen Electronics | ZE07-H2 — ZE07 electrochemical H₂ module | 0–30,000 ppm; 50 ppm resolution; DAC (0.4–2 V) + UART (3V-TTL) output; 5–12 V, warm-up ≤3 min; response/resume ≤60 s; 3–5 yr life; -10…55°C, 15–90% RH ✓ | $ | datasheet | page |
Metal-oxide (MOX) chemiresistors
Section titled “Metal-oxide (MOX) chemiresistors”| Vendor | Product / SKU | Key specs | Price | Datasheet | Modality |
|---|---|---|---|---|---|
| Bosch | BME688 — BME6xy MEMS MOx gas-scan + T/RH/P | Broadband ppb VOC/VSC/CO/H₂ but not independently H₂-ppm calibrated (needs BSEC/AI-Studio model); 3.9 mA scan / <0.1 mA ULP; $8.99 bare (DigiKey) ✓ | $ | datasheet | page |
| Bosch | Fuel-cell H2 leak sensor + virtual H2 sensor — FCEV H₂ leak sensing (MEMS + software) | Thermal-conductivity principle (Bosch Mobility): H₂ leakage sensor 0–4 vol% ±1.0 vol%; exhaust H₂ sensor 0–10 vol% ±1.0 vol%, 0–100% RH, 0.5–1.3 bar, ASIL-B; plus model-based virtual H₂ sensor (<5% estimation error, up to 100% H₂); CAN interface ✓ | $ | datasheet | page |
| Figaro Engineering | TGS2600 — Air-contaminant MOS sensor | ~1–30 ppm H₂ (broad multi-gas, not H₂-selective); 5.0V heater, 42±4 mA, ~210 mW; Rh≈83 Ω ✓ | $ | datasheet | page |
| Figaro Engineering | TGS2616-C00 / -C01 — MOS H₂ sensor | 30–3000 ppm; 280 mW heater; Rs 0.30–3.0 kΩ at 100 ppm H₂; C01 reduces acetylene interference (DGA use); −10 to +50 °C ✓ | $ | datasheet | page |
| Figaro Engineering | TGS6812-D00 — Catalytic H₂/CH₄/LPG bead | 0–100% LEL H₂/methane/iso-butane; 3.0 V, 175 mA, 525 mW heater; ΔVout 8–16 mV @4000 ppm H₂; −10 to +70 °C; adsorbent cap cuts organic-vapour cross-sensitivity ✓ | $ | datasheet | page |
| Figaro Engineering | TGS8100 — Low-power air-contaminant MOS sensor | ~1–30 ppm (H₂/ethanol class); 1.8V heater, 8 mA, 15 mW pulsed (~92% power cut vs continuous); SMD; battery-powered equipment ✓ | $ | datasheet | page |
| Figaro Engineering | TGS821 — 'Special' H₂ SnO₂ bead sensor | 50–4000 ppm (rated floor 50 ppm); Rs 1–10 kΩ @100 ppm; 660 mW heater; slope 0.60–1.20 dec/dec; ~2× T/RH baseline swing; CH₄/EtOH/CO cross-response ($10–20 class) ✓ | $ | datasheet | page |
| Nissha FIS | FH2-HY04/05/06/11 — Catalytic-combustion H₂ line | 0–4 vol%; startup ≤1 s, T90 ≤3 s; HY04 12V/PWM (cars/buses/trucks), HY05 12V/CAN 500kbps, HY06 24V/CAN 250-500kbps, HY11 5V/analog; siloxane-resistant; distinct from SB/SP MOX line ✓ | $ | datasheet | page |
| Nissha FIS | SB-19-00 — SB semiconductor-bead MOX | Rs 0.2–2 kΩ at 100 ppm H₂; sensitivity slope α 0.6–1.2 (100→1000 ppm); 120 mW heater (0.9V/130mA); O₂-dependency (min >18% O₂, std 21%); −10 to 50 °C, <95% RH; 0.6 g ✓ | $ | datasheet | page |
| Nissha FIS | SP-19-01 — SP planar MOX | Optimized for low-concentration H₂; Rs 0.5–5 kΩ at 100 ppm; slope α 0.60–1.2; 315 mW heater (5.0V/80mA); O₂-dependency (min >18%); −10 to 50 °C, <95% RH; 1.75 g ✓ | $ | datasheet | page |
| Renesas Electronics | ZMOD4410 — ZMOD44xx MEMS MOx + ASIC | TVOC/IAQ-focused (no standalone H₂-ppm spec); broadband-reactive MOx, 1.7–3.6 V, 12-LGA; datasheet notes high H₂ sensitivity (resistance-based); 10-yr JEDEC-qualified life; mW-class duty-cycled ($5–10 class) ✓ | $ | datasheet | page |
| Renesas Electronics | ZMOD4510 — ZMOD45xx MEMS MOx + ASIC | O₃/NO₂ oxidizing-gas channel, MOx chemiresistor, 12-LGA; pairs with ZMOD4410 for cross-compensation; 10-yr JEDEC-qualified life ✓ | $ | datasheet | page |
| Sensirion | SGP4x — SGP4x MEMS MOx VOC/NOx index | VOC/NOx index (not H₂-targeted); SGP40 VOC-only, SGP41 VOC+NOx dual-pixel; I²C, DFN 2.44×2.44×0.85mm; cited for vendor's plain-language MOX-limitation explainer ✓ | $ | datasheet | page |
| Sensirion | STC31 / STC31-C — CMOS thermal-conductivity gas sensor | 0–100 vol% (binary CO₂/N₂/air marketed; TC principle reused for H₂ by analogy); typ. ±0.5 vol% (low-cross-sensitivity mode), ±0.2 vol% best case, up to ±2.0 vol% wide-range; fully functional −40 to 105 °C, 200–2000 mbar; I²C; $24–65 (Digikey) ✓ | $ | datasheet | page |
Catalytic pellistors
Section titled “Catalytic pellistors”| Vendor | Product / SKU | Key specs | Price | Datasheet | Modality |
|---|---|---|---|---|---|
| Blackline Safety | LEL-MPS (G7 cartridge) — G7 combustible-gas cartridge (NevadaNano MPS-based) | 0–100% LEL; 0.1% LEL resolution; licensed Nevada Nano MPS (Molecular Property Spectrometer) sensing element, not classic catalytic bead; alt. LEL-IR (MIPEX NDIR) option also 0–100% LEL/1% LEL res; −20 to 55 °C op., IP67 ✓ | $$$ | datasheet | page |
| MSA Safety | FL500-H2 — FL500-H2 UV/IR hydrogen flame detector | UV 185–260 nm + IR ~2.95 µm; 60 ft (~18 m) range; 2.1 s response to H₂; −55…+85 °C (CSA/ATEX/IECEx), −50…+85 °C (FM); IP66/IP67; FM/CSA/ATEX/UKCA/IECEx ✓ | $$$ | datasheet | page |
| MSA Safety | Observer-i — Observer-i (Gassonic) ultrasonic gas-leak detector | Fixed-point (non-imaging) ultrasonic/acoustic leak detector; ANN false-alarm rejection down to 12 kHz; range up to 28 m; T90 <1 s; −40 to +60 °C; IP66/Type 4X; 316 SS housing; 2-yr warranty ✓ | $$$ | datasheet | page |
| MSA Safety | SAW MiniCAD mk II — SAW-array chemical-agent detector (Microsensor Systems) | Handheld battery SAW-array CWA detector; GB alarm threshold 0.5 mg/m³, 60 s analysis, 2 min warm-up; 0.5 kg; 5-yr shelf life; adjacent precedent, not an H₂ product ✓ | $$$ | datasheet | page |
| MSA Safety | XCell catalytic bead — XCell cat-bead element (Ultima X / S4000CH) | Integrated fixed-point cat-bead detector platform with embedded ASIC; life >4 yr typical (2x industry avg per MSA); standard 3-yr warranty; TruCal extends cal interval on select gases ✓ | $$$ | datasheet | page |
| New Cosmos Electric | FCS-H20 (CSD-02/CSD-04) — Catalytic-combustion H₂ sensor for FCEVs | 0–4 vol% H₂; GTR-13 (FCEV) compliant, used in Toyota Mirai; >15-yr maintenance-free life; low power/size/weight; siloxane-poisoning resistant; automotive variants sold as CSD-02 (PWM out) / CSD-04 (CAN out) ✓ | $ | datasheet | page |
| New Cosmos Electric | KD-12 — Diffusion-type H₂ gas detector head (hydrogen refuelling stations) | Fixed diffusion-type detector head with display; developed via New Cosmos hydrogen-diffusion/CFD studies for H₂ refuelling-station leak monitoring; explosion-proof housing | $$ | datasheet | page |
Thermal-conductivity & acoustic
Section titled “Thermal-conductivity & acoustic”| Vendor | Product / SKU | Key specs | Price | Datasheet | Modality |
|---|---|---|---|---|---|
| ABB | AZ100 — AZ100 zirconia oxygen analyzer | In-situ zirconia O₂ analyzer (not H₂); OEM boiler/burner-controls market; low-temperature type to 600 °C process temp, 400 °C max duct surface temp ✓ | $$$$ | datasheet | page |
| ABB | EL3000 Series (Caldos27 TCD) — EasyLine EL3000 with Caldos27 thermal-conductivity sensor | Silicon-sensor TCD module; per search-indexed EL3000 datasheet: 0–11 vol% H₂ in air/Ar/CH₄/CO/CO₂/N₂, 0–10 vol% H₂ in NH₃; fast T90 via small cell volume — PDF text not independently re-extracted this session (unverified) | $$$ | datasheet | page |
| ABB | Katharometer Series 6517 — 6517 katharometer | Thermal-conductivity detector for continuous industrial use; CENELEC EExia IIC (Zone 0) T4, −20/+55 °C ambient; H₂ explicitly in Group IIC coverage; shunt-diode safety barriers ✓ | $$$$ | datasheet | page |
| ABB | LGR-ICOS GLA132-GGA / UGGA — LGR OA-ICOS greenhouse-gas analyzer | OA-ICOS; CH₄ 0.6–2 ppb; CO₂ 100–300 ppb; extended range to 10% CH₄; 15 kg, 60–66 W ✓ | $$$$ | datasheet | page |
| Baker Hughes / Panametrics | XMTCpro — XMTCpro online TC transmitter | Binary H₂ in N₂/air/O₂/CO₂, He, CO₂, SO₂, Ar; ranges 0–1% to 0–100% (12 span options); accuracy ±2% of span; T90 20 s; SIL 2 by design (IEC61508 optional); Modbus RS232/RS485, 2×4-20mA; 24 VDC; IP66, ATEX/IECEx ✓ | $$$$ | datasheet | page |
| E/One (Environment One) | Generator Gas Analyzer (GGA) — GGA triple-range online TCD | 70–100% H₂ in air (±0.5% FS); 0–100% H₂/air in CO₂ (±1.0% FS); linearity ±1% FS; drift <0.2%/mo; 500 cc/min nominal; resolution ±0.1%; 4–20 mA self-powered; flameproof/explosion-proof/IS variants ✓ | $$$$ | datasheet | page |
| Eaton / MTL (Crouse-Hinds) | K522 / K1550 — K522 katharometer / K1550 gas analyser | Classical hot-wire katharometer; ranges 0–5%/0–20%/0–100%/80–100%/95–100% H₂ (gas-dependent); accuracy ±2% FSD; T90 20 s; stability <1% FSD/mo; 4–20 mA + 2 alarm relays; K1550FX ATEX/EEx d IIB+H₂ hazardous-area version ✓ | $$$$ | datasheet | page |
| Infineon | XENSIV TCI (TCI-B) — XENSIV TCI MEMS thermal-conductivity sensor | 0–16 vol% H₂ (LDL 0.1%); ±0.12 vol% accuracy; <100 ms response; −40 to 105 °C; 15-yr lifetime claimed; 112 µA @1 meas./s, 3.3 V, I²C up to 1 Mbit/s; immune to poisoning ✓ | $ | datasheet | page |
| NevadaNano | MPS Flammable Gas Sensor — MPS (Molecular Property Spectrometer) | 0–100% LEL per-gas (H₂ ±5% LEL @50% LEL), 0.1% LEL res, T90 <20 s, −40 to 75 °C, 0–99% RH non-cond., 8.9 mA avg (5–21 mA range) @3.3–5.0 V, ~29 mW; 12 gases incl. H₂; >1-yr cal interval, >5-yr life ✓ | $ | datasheet | page |
| NevadaNano | MPS H2 Gas Sensor (3.0–6.0 ULP) — MPS Hydrogen sensor variants | 0–100% LEL H₂; 0.1% LEL res; T90 <20 s; −40 to 75 °C; power by gen: 3.0/4.0 29 mW, 5.0 27.3 mW, 6.0 ULP 1.35 mW; 15-yr sensor life; no field calibration, O₂-independent, TrueLEL-certified alternative to catalytic bead ✓ | $ | datasheet | page |
| Posifa Technologies | PGS1000 / PGS1004 — PGS1000 MEMS TC H₂ sensor | 0–4 vol% H₂ (PGS1004); ±6% reading accuracy; T90 1.4 s; 8 mA avg; −40 to 85 °C; I²C 0–40,000 count output; ~$35–45 (small qty); automotive/fuel-cell H₂ leak/level ✓ | $ | datasheet | page |
| Posifa Technologies | PGS4100 — PGS4100 MEMS TC H₂ sensor | 0–4 vol%; 10 ppm (analog)/2 ppm (digital) res; ±1200 ppm accuracy 0–20,000 ppm, ±6% above; T90 1 s; −40 to 85/90 °C; 1200 ppm/5 yr stability; 190 mW peak/50 mW avg ✓ | $ | datasheet | page |
| Posifa Technologies | PGS5100 — PGS5100 MEMS TC H₂ sensor (EV battery / leak safety) | 0–25 vol% H₂; 2 ppm digital resolution; ±1200 ppm accuracy (0–100% RH, 70–120 kPa), ±6% reading >20,000 ppm @25 °C; T90 100 ms, warm-up 200 ms; 190 mW peak/50 mW avg @5 V; −40 to 85 °C, 0–100% RH condensation-resistant; RH+barometric compensated; RS-485 Modbus RTU (CAN future); IP6K9, automotive connector; >15-yr life; 2nd-gen TC die, SMD ✓ | $ | datasheet | page |
| Xensor Integration | XEN-TCG3880 / XEN-5310 / XEN-5320 — MEMS thermal-conductivity gauge + readout | TC 9 ms (air), 36 ms (vacuum); 1–3% FS inaccuracy; −40 to +85 °C (module); ~1200 ppm/yr long-term stability (10 ppm short-term); 5–8 V ~20 mA; die ~$10–20 ✓ | $ | datasheet | page |
Palladium resistive
Section titled “Palladium resistive”| Vendor | Product / SKU | Key specs | Price | Datasheet | Modality |
|---|---|---|---|---|---|
| H2scan | Fleet Advisor — Fleet Advisor transformer-fleet DGA platform | Continuous dissolved-gas-analysis monitoring for transformer fleets (not a standalone gas-phase H₂ sensor); now marketed alongside H2cloud/Sentinel IoT platform | $$$ | — | page |
| H2scan | GRIDSCAN 5000 / 5000 HP — GRIDSCAN transformer DGA monitor | 25–5000 ppm (oil & gas phase); accuracy ±25 ppm/±20% (5000) or ±15 ppm/±10% (5000-HP); response <60 min; RS-485 Modbus/DNP3; IP68 (25 ft/14 days); 10+ yr sensor life ✓ | $$$ | datasheet | page |
| H2scan | HY-ALERTA 1600 / 5020 / 5021 / 5320 — HY-ALERTA area safety monitors | 0.4–5% H₂ (10–125% LEL); accuracy ±(0.03×indication+0.2)%H₂; T90 <60 s; −20 to 55 °C; 10-yr sensor warranty, no field calibration; RS-485 Modbus, 4-20mA, optocouplers ✓ | $$$ | datasheet | page |
| H2scan | HY-ALERTA 600B / 2620 — HY-ALERTA general-purpose & explosion-proof area monitors | 0.4–5% H₂ (10–125% LEL); T90 <60 s; 2620 explosion-proof (Ex db IIB+H₂ T4 Gb, IP67, 90–240 VAC, 15 W); 600B general purpose (10–26 VDC, 10 W); 90-day cal interval, air background ✓ | $$$ | datasheet | page |
| H2scan | HY-OPTIMA 5031/5032/5033/5034 — HY-OPTIMA 5030 Gen-5 in-line process analyzer | 0–10% (5031) to 0–100% (5033/34); LDL 0.03–0.5%; T90 60–90 s; CO/H₂S tolerance model-dependent (5034: 20% CO/3% H₂S); RS-485 Modbus RTU 19200 baud, 4-20mA opt., IP68, 9–48 VDC, 10 W ✓ | $$$ | datasheet | page |
| H2scan | HY-OPTIMA 700B / 2700 / 1700 — HY-OPTIMA process analyzers | Solid-state Pd:Ni, non-consumable; 710B 0.1–10%, 720B 0.4–5%, 730B/740B 0.5–100% H₂; 2700 explosion-proof; <95% RH non-cond.; 1700 discontinued (ATEX/IS) ✓ | $$$ | datasheet | page |
| Servomex | SERVOTOUGH H2scan — SERVOTOUGH H2scan hydrogen process analyzer | Palladium-alloy (Pd/Ni) thin-film resistive H₂ sensing (H2scan technology base); solid-state, non-consumable; typically paired with SERVOTOUGH SpectraScan 2400 ✓ | $$$$ | datasheet | page |
| Servomex | Zirconia Gas Analyzer — Zirconia O₂ process/combustion analyzer | Y₂O₃-stabilized ZrO₂ cell at 600–800 °C with catalytic electrodes; O₂ (not H₂) for cement/power/pulp ✓ | $$$$ | datasheet | page |
Work-function devices
Section titled “Work-function devices”| Vendor | Product / SKU | Key specs | Price | Datasheet | Modality |
|---|---|---|---|---|---|
| AppliedSensor (ams-OSRAM) | HLS-440 / HLS-440P / HLS-442 — HLS-44x Field-Effect hydrogen leak sensor | Heated FET catalytic-gate + thermal-conductivity channel; HLS-440P 0–10% H₂, IP6K9, ATEX Zone 2, CAN; crash-tested on FCEV SUVs; HLS-442 0–4.4% H₂, ±3000 ppm accuracy, T90 <2 s, CAN 500 kbit/s, 75 mA typ., −40 to 85 °C, IP67, 10-yr life, SIL2/ATEX 100a ✓ | $$$ | datasheet | page |
| SenSiC | iCSiC / iQSiC / EmiSiC — SiC-FET in-situ exhaust gas sensors | SiC ceramic-encapsulated sensor placed directly in hot exhaust; iQSiC CO probe: 225–325 °C op. (450 °C max non-destructive), T90 <10 s, ≥2 yr life, H₂ cross-sensitivity ~30% (i.e. H₂-responsive); in-situ placement removes sample-cooling lag (combustion/emissions/NH₃-slip) ✓ | $$$ | datasheet | page |
Plasmonic & metamaterial
Section titled “Plasmonic & metamaterial”| Vendor | Product / SKU | Key specs | Price | Datasheet | Modality |
|---|---|---|---|---|---|
| 2Witech Solutions | Hybridized High-Q Plasmonic H₂ Sensor — ARPA-E H2SENSE plasmonic H₂ sensor | Plasmonic metasurface + H₂-permeable self-cleaning coating; target first mobile 20 ppb self-cleaning plasmonic sensor; no independent result published yet ✓ | unknown | datasheet | page |
| Insplorion | M8 / S2 Flow / X1 — NPS battery/electrochemistry analysers | Same NPS platform, fiber-optic sensor chips; up to 8 operando cell channels; retained after H₂-business divestment ✓ | $$$ | datasheet | page |
| Insplorion | NPS-P2 — NPS-P2 nanoplasmonic hydrogen detector | Pd-alloy LSPR; 0.4–4 vol% H₂; t90 <5 s; ±0.2 vol% or ±25% of reading; 24 VDC, TTL / 4–20 mA; IP64; 500 g; ATEX zone 1 in progress ✓ | $$$ | datasheet | page |
| Mann Teknik (MannTek) | NPS-P2 (post-acquisition) — H₂ sensing integrated into refueling couplings | Acquiring NPS-P2 IP/product; 30-yr background in cryo/LH2 couplings (truck/ship/aviation); deal pending shareholder approval ✓ | $$$ | datasheet | page |
Fiber-optic & chemochromic
Section titled “Fiber-optic & chemochromic”| Vendor | Product / SKU | Key specs | Price | Datasheet | Modality |
|---|---|---|---|---|---|
| GLOphotonics | PowerLink (PMC) — PowerLink Photonic MicroCell (IC HC-PCF) | Hermetically-sealed gas-fillable HC-PCF module; broadband UV–IR; <10 dB/km loss reported; OEM component, no public unit pricing | unknown | datasheet | page |
| Intelligent Optical Systems | Multi-point fiber-optic H2 leak system — Fiber-optic H₂ leak-detection system (custom) | Optrodes w/ temperature-sensitive/chemochromic indicators on telecom fiber; field-demoed 2001 (Boeing/Delta IV, NASA Stennis); program/contract-based | unknown | — | page |
| NKT Photonics | HC-800(-B) / HC-1550(-02) — Hollow-core photonic-crystal fiber | Photonic-bandgap hollow-core fiber; low-loss windows (e.g. 1500–1650 nm for HC-1550-02); OEM fiber, no public unit pricing ✓ | unknown | datasheet | page |
| Precise Downhole Solutions | PureLight FOPG — PureLight Fiber-Optic Pressure Gauge | Sapphire/quartz fiber gauge for 'high temperature / hydrogen rich' wells; up to 30,000 psi; 10 samples/s (P/T, not H₂ concentration) | $$$ | datasheet | page |
| Technica Optical Components | T910 — T910 Hydrogen Detection Sensor | Catalytic-combustion twin custom FBG transducer, single-mode fiber; response 'within seconds'; daisy-chainable; EMI/lightning-immune; self-T-compensated; SS package ✓ | $$$ | datasheet | page |
Chemochromic indicators
Section titled “Chemochromic indicators”| Vendor | Product / SKU | Key specs | Price | Datasheet | Modality |
|---|---|---|---|---|---|
| Element One | Chemochromic paints / inks / decals — Visual Hydrogen Detection line | Same pigment chemistry as DetecTape in paint/ink/molded/film formats; threshold as low as 0.04% (1/100 LFL); reversible or non-reversible ✓ | $$ | datasheet | page |
| Element One | DetecTape H2 — DetecTape H₂ visual leak tape | Chemochromic silicone tape; gray→black in minutes; −54 to +232 °C; 1"/2" × 15 ft rolls; gas-permeable; NREL-validated (2016); $129–185/roll ✓ | $$ | datasheet | page |
Raman analyzers
Section titled “Raman analyzers”| Vendor | Product / SKU | Key specs | Price | Datasheet | Modality |
|---|---|---|---|---|---|
| Endress+Hauser | Prosonic Flow G300 / FLOWSIC610 — Ultrasonic flow with H₂ purity option | ToF ultrasonic; custody-transfer H₂ up to 30% blends (FLOWSIC600-XT: MID-approved custody transfer for pure/blended H₂, DN50-DN400, fiscal accuracy class 1, 1000 kHz electronics); ≤±0.2–0.5% accuracy classes (FLOWSIC610 attribution per dossier) ✓ | $$$$ | datasheet | page |
| Endress+Hauser | Raman Rxn-30 — Raman Rxn-30 gas-phase probe | Gas-phase headspace/in-situ probe for Rxn5/Rxn4/Rxn2; 316/316L SS, PTFE, sapphire, fused silica; to 68.9 barg/1000 psig, −20 to 150 °C; ATEX/CSA/IECEx/UKCA/JPEx; validated for parahydrogen-conversion monitoring in H₂ liquefaction ✓ | $$$ | datasheet | page |
| Endress+Hauser | Raman Rxn2 — Raman Rxn2 benchtop/cart + WetHead immersion probe | 532/785/1000 nm; 100–4350 cm⁻¹ (≈535–692 nm scattered at 532 nm); deployed via 100 m fiber into a flooded borehole for dissolved-gas Raman (H₂ not yet) ✓ | $$$$ | datasheet | page |
| Endress+Hauser | Raman Rxn4 — Raman Rxn4 analyzer | 532/785/1000 nm (hybrid 785 nm option); 150–4350 cm⁻¹ (532 nm; ≈536–692 nm scattered) / 150–3425 cm⁻¹ (785 nm; ≈794–1074 nm) / 200–2400 cm⁻¹ (1000 nm; ≈1020–1316 nm); marketed for LNG/refining/energy gas-phase Raman incl. ammonia production ✓ | $$$$ | datasheet | page |
| Endress+Hauser | Raman Rxn5 (KRXN5C) — Raman Rxn5 process analyzer | 532 nm; 150–3425 cm⁻¹ (≈536–651 nm scattered), 5 cm⁻¹ res; up to 4 ch; <300 W; −20 to +50 °C; IP56; ATEX/CSA/IECEx; fiber probes to 500 ft, 70 bar/150 °C; derives Wobbe/heating value ✓ | $$$$ | datasheet | page |
| Endress+Hauser | RamanRXn1 — RamanRXn1 (HoloPlex) | NIR 'Invictus' laser; HoloPlex grating single-shot full-spectrum; gas-phase probe accessory ✓ | $$$$ | datasheet | page |
| Fraunhofer IPM | Filter-based H₂ Raman sensor — TransHyDE low-cost H₂ Raman sensor | 532 nm; bandpass-filtered ~4150 cm⁻¹ (≈683 nm scattered) H₂ Q-branch onto low-cost CMOS camera; portable form factor; low-cost design goal ✓ | $ | datasheet | page |
| IS-Instruments | Aura — Aura HC-MOF gas Raman analyzer | HC-MOF Raman; sensitivity ~0.04% (~400 ppm); tested 0.5–2.0 barg; detects H₂/D₂/HD; H₂ pipeline-blending / emissions / fusion-fuel targets ✓ | $$$$ | datasheet | page |
| Metrohm | 2060 RISE — 2060 RISE Raman Intelligent SEnsor | 785 nm inline Raman spectrometer; RISE/RISE-HT/RISE-Ex/RISE-HT-Ex variants; real-time process/reaction monitoring, raw-material and impurity detection ✓ | $$$$ | datasheet | page |
| Metrohm | 2060 Raman Analyzer — 2060 process Raman analyzer | 785 nm; continuous inline; up to 5 sampling streams; integrated reference channel for calibration ✓ | $$$$ | datasheet | page |
| NETL (US DOE) | Raman Gas Analyzer (RGA) — RGA compact rack-mount Raman prototype | 532 nm, 150 mW; reflective hollow waveguide >1000× signal boost; 1 s target; 0.1 vol% accuracy target; up to 1000 psi; TRL ~5–6 | unknown | — | page |
| Spectral Sciences | Raman Hydrogen Sensor — Free-space laser Raman H₂ sensor (historical) | Free-space Raman optimized for fast response; 0.0013 atm (~1300 ppm) LOD; 0.3 s response; 18 mW laser; R&D/government program | unknown | — | page |
| tec5 (tec5USA) | Raman Spectrometer for natural gas — tec5 natural-gas Raman spectrometer | 785 nm, 35–500 mW tunable; 1024×58 CCD; VPH gratings; 300–3100 cm⁻¹ (≈804–1038 nm scattered); Hellma Multipass / tecRaman probes ✓ | $$$ | datasheet | page |
| Tornado Spectral Systems | Raman analyzers (O&G / LNG) — Process Raman analyzers | Proprietary high-throughput Raman; explicitly measures homonuclear diatomics (H₂/N₂/O₂) inaccessible to IR; product names not confirmed | $$$$ | datasheet | page |
| Xcalibur Smart Mapping | H-MAS — Hydrogen Mapping Airborne Spectrometer | Airborne standoff Raman scattering of near-surface atmosphere for remote H₂ mapping; no verified LOD published; survey-service model ✓ | unknown | datasheet | page |
Optical (absorption / laser / other)
Section titled “Optical (absorption / laser / other)”| Vendor | Product / SKU | Key specs | Price | Datasheet | Modality |
|---|---|---|---|---|---|
| Aeris Technologies | MIRA Pico — MIRA Pico mid-IR TDLAS analyzer | Direct-absorption TDLAS; CH₄/C₂H₆/CO₂/CO/N₂O/CH₂O/OCS/C₂H₂; <3 kg, 18 W, 60 cc cell, 1–5 Hz; 'sub-ppb precision' (vendor claim) ✓ | $$$$ | datasheet | page |
| Axetris | LGD Compact-A — LGD Compact-A TDLS module | TDLS; CH₄/CO₂/C₂H₆/NH₃/H₂O/C₂H₂ variants; CH₄ LDL ≤0.4 ppm (≤0.15 @10 s); T90 ≤1.8 s; −10 to 55 °C; 3.7–30 VDC ✓ | $$$ | datasheet | page |
| Carl Zeiss | ZGL 2505 — ZGL 2505 gas interferometer (historical) | 1957-era portable methane/CO₂ interferometer (Teralba Colliery); optical-interferometric gas measurement; no longer manufactured | unknown | — | page |
| Emerson | Rosemount ultrasonic flow — Ultrasonic flow meter (H₂ purity option) | ToF ultrasonic flow; certified for custody-transfer H₂ up to 30% blends; ≤±0.2–0.5% accuracy classes | $$$$ | datasheet | page |
| Emerson | UVS-H2 / UV/IRS-H2 — Net Safety / Rosemount UV/IR hydrogen flame detector | UV 185–260 nm (+IR); 120° FOV; 55 ft / 1.8 s response; −50…+75 °C; CSA/ANSI-UL/ATEX ✓ | $$$ | datasheet | page |
| FLIR | GF343 — GF343 OGI thermal camera (discontinued) | InSb 3–5 µm cooled, filtered ~4.3 µm; used with 3–4% CO₂ tracer gas to visualize H₂ leaks in >95%-purity generator cooling ✓ | $$$$ | datasheet | page |
| Gasmet Technologies | DX4000 — DX4000 portable FTIR | Up to 50 gases (CO₂/CH₄/CO/H₂S/NH₃/VOCs); 8/4 cm⁻¹ res, 900–4200 cm⁻¹ (2.4–11.1 µm); 5 m heated (180 °C) cell; T90 <120 s; 150 W avg; 13.9 kg ✓ | $$$$ | datasheet | page |
| LI-COR Biosciences | LI-7810 — LI-7810 OF-CEAS analyzer | CH₄ 0.25–0.6 ppb; CO₂ 1.5–3.5 ppm; H₂O; −25 to 45 °C; 0–85% RH; <1 ppb/24 h drift ✓ | $$$$ | datasheet | page |
| LI-COR Biosciences | LI-7815 — LI-7815 OF-CEAS CO₂ analyzer | OF-CEAS; CO₂ 0–10,000 ppm, 0.04 ppm precision @400 ppm/5s, <0.2 ppm/24h drift; H₂O 100–60,000 ppm; −25 to 45 °C; 10.5 kg incl. batteries; 8 h battery life ✓ | $$$$ | datasheet | page |
| Malvern Panalytical | Handheld LIBS (SciAps Z-903 distribution) — Handheld LIBS elemental analyzer | Distributes SciAps Z-903 (H-capable, 190–950 nm); general elemental/alloy ID; ~$40k–55k reported ✓ | $$$$ | datasheet | page |
| MinEx CRC | Downhole LIBS logging tool — Pre-commercial downhole LIBS logger | 75 mm OD, ~1.7 m, <5 kg, wireline; NQ-borehole compatible; 60–300 analyses/m at 2–10 m/min; field trials only | unknown | — | page |
| mirSense | MIRCHIP X — MIRCHIP X QCL OEM multigas module | QCL-based compact OEM multigas analyser module (customer-specified gases); mass-scale-production chip form factor, easily integrable into customer systems ✓ | $$$ | datasheet | page |
| mirSense | multiSense — multiSense QCL photoacoustic analyzer | QCL + photoacoustic cell; hydrocarbons incl. CH₄/NH₃/NO/NO₂/SF₆/CF₄; matchbox-sized; sub-ppm LOD (vendor claim) | $$$$ | — | page |
| Picarro | G2201-i — G2201-i CRDS isotopic analyzer | WS-CRDS; CO₂ 200 ppb+0.05% (1σ,30 s); CH₄ 1 ppm+0.25%; δ¹³C ✓ | $$$$ | datasheet | page |
| Picarro | G2401 — G2401 CRDS analyzer | CO₂/CO/CH₄/H₂O, multi-species simultaneous, ppb-class ✓ | $$$$ | datasheet | page |
| Picarro | GasScouter G4302 — G4302 portable CRDS | Portable/battery; CH₄ 3–30 ppb; C₂H₆ 1–10 ppb; 25 lb, 35 W, 6 h battery ✓ | $$$$ | datasheet | page |
| SciAps | Z-901 — Z-901 handheld LIBS | Lower-cost; explicitly CANNOT measure H/Li/Na/C/N/O/Cl/Br/F/Ce/Rb/S per vendor spec (procurement-relevant vs Z-903) ✓ | $$$$ | datasheet | page |
| SciAps | Z-903 — Z-903 handheld LIBS | 190–950 nm triple-spectrometer; measures H via extended range; full periodic table H→U; PULSAR laser 5–6 mJ, up to 50 Hz; ~4 lb; ~$40k–55k class ✓ | $$$$ | datasheet | page |
| Thermo Fisher Scientific | Delta V + TC/EA — Delta-series IRMS for δD-H₂ | H/D, ¹³C, ¹⁵N, ¹⁸O, ³⁴S ratios; δD precision ~±2‰ (2σ) via TC/EA; high-capex lab; quote-only | $$$$ | datasheet | page |
| Thermo Fisher Scientific | Niton Apollo — Niton Apollo handheld LIBS | Handheld LIBS, carbon-equivalency/alloy focus; Class 3b laser; 6.4 lb (2.9 kg); IP54; two hot-swap batteries, 3–5 h life; results in ~10 s ✓ | $$$$ | datasheet | page |
Gas chromatography
Section titled “Gas chromatography”| Vendor | Product / SKU | Key specs | Price | Datasheet | Modality |
|---|---|---|---|---|---|
| Agilent Technologies | 990 Micro GC / 990 Mobile Micro GC — 990 Micro GC (µTCD) | MEMS µTCD; 1.5–3 min/channel; MolSieve 5A + PoraPLOT U; field case ~16 h autonomy, 12 VDC/180 W; mixed He/H₂ carrier H₂ method ✓ | $$$$ | datasheet | page |
| AMETEK Process Instruments | ta3000R / ta5000R — Reduction Gas Analyzer (RGA) | HgO reduction / UV photometric; factory LDL 25 ppb H₂ (bulk) / 50 ppb (dissolved); 10 ppb CO; accuracy ±10 ppb or ±10%; 35 lb ✓ | $$$$ | datasheet | page |
| Chromatotec | Chroma DID (Auto-GC 866) — Chroma DID discharge-ionization GC | PDHID-class DID; 50–100 ppb LOD (<50 ppb special); 10–15 min cycle; He carrier, 3 bar, ≤50 mL/min | $$$$ | datasheet | page |
| Chromatotec | ChromaTCD (Auto-GC 866) — ChromaTCD continuous GC-TCD | Continuous permanent-gas + light-HC monitor; H₂ from ppm to %; integrated H₂ generator supplies TCD carrier gas ✓ | $$$$ | datasheet | page |
| INFICON | HAPSITE — HAPSITE handheld GC/MS | Battery-portable GC/MS with library matching; VOC/CWA focus; no H₂ capability found | $$$$ | datasheet | page |
| INFICON | Micro GC Fusion — Micro GC Fusion (MEMS µTCD) | Vendor 1 ppm H₂ LOD, '≥10× more sensitive than traditional TCD'; dual Ar/He carrier for pipeline H₂; ~1–4 cc/min carrier; quote-only ✓ | $$$$ | datasheet | page |
| Peak Laboratories | Peak Performer 1 RCP — Reducing Compound Photometer | HgO reduction / UV photometric; LOD 800 ppt H₂ / 300 ppt CO in N₂/Ar/He/O₂; 1000:1 linear; <2 min run ✓ | $$$ | datasheet | page |
| SRI Instruments | 310 Soil-Gas GC — 310 / Natural Gas Analyzer GC | TCD (+FID option); TCD-only LOD ~200–300 ppm; water-vapor tolerant; field/battery-portable; ~$5,000–20,000+ (not re-verified) ✓ | $$$ | datasheet | page |
| SRI Instruments | 8610C (8610D / 310) — Field-portable gas chromatograph | Up to 6 of 16 detectors (TCD/FID/RGD/HID/ECD/PID/FPD); oven ambient–400 °C; TCD LOD ~100 ppm; mainframe $8,944–12,235, configured $16k–32.6k (2023) ✓ | $$$ | datasheet | page |
| SRI Instruments | HID — Helium Ionization Detector (SRI design) | Pulsed/DC He ionization; universal permanent-gas, non-radioactive; bare $4,738, chassis $7,116 ✓ | $$$ | datasheet | page |
| SRI Instruments | RGD — Reduction Gas Detector (add-on) | HgO reduction / UV photometric; ~3 ppb H₂ reported (500 ppb on unoptimized bench); 250 °C reactor; bare $5,810, chassis $8,188 ✓ | $$$ | datasheet | page |
Mass spectrometry
Section titled “Mass spectrometry”| Vendor | Product / SKU | Key specs | Price | Datasheet | Modality |
|---|---|---|---|---|---|
| 908 Devices | MX908 / M908 — Handheld high-pressure mass spectrometer | High-pressure MS (>1 Torr), ion-trap array, ambient ionization; ~2 kg; explosives/narcotics/CWA focus; no H₂ capability found | $$$$ | datasheet | page |
| Gasometrix | miniRUEDI — miniRUEDI field-portable MIMS | Base He/Ne/Ar/Kr/N₂/O₂/CO₂ (extended methods for CH₄/H₂S/H₂); ΔM ≤0.5 amu; 50 W; 32 kg; battery/solar-capable; quote-only ✓ | $$$$ | datasheet | page |
| Hiden Analytical | HPR-40 DSA / DEMS — Membrane-inlet MS (MIMS) | 1–200/300 amu; 100%–60 ppt sensitivity; up to 650 meas/s; dual Faraday/Channeltron; PDMS membrane inlets; ~33 kg; quote-only | $$$$ | datasheet | page |
| Hiden Analytical | QGA / QGA 2.0 — Transportable quadrupole gas analyzer | HAL 201 RC quadrupole; 1–200 amu; 100 ppb–100% dynamic range; up to 1000 meas/s; H₂-compatible vacuum (QGA 2.0); quote-only | $$$$ | datasheet | page |
| Hiden Analytical | pQA — Portable Quadrupole Analyser (MIMS, field-portable) | Field-portable MIMS in Pelican case; 200 amu (300 amu option); sub-ppb dissolved-gas sensitivity; 12 V/battery/solar or 220 V; interchangeable membrane-inlet probes (direct, flow-through, circular cell) for groundwater/sediment dissolved-H₂ studies; quote-only ✓ | $$$$ | datasheet | page |
| Pfeiffer Vacuum | ASM 340 / ASM 306 S — ASM-series helium/hydrogen sniffer leak detector | Dry vacuum-pump QMS leak detector for He or H₂ tracer gas; MDL vacuum mode 1×10⁻¹² mbar·l/s, sniffer mode 1×10⁻⁹ mbar·l/s (ASM 340); tabletop, touchscreen; not a stand-alone ambient-H₂ concentration monitor | $$$$ | datasheet | page |
| Pfeiffer Vacuum | OmniStar / ThermoStar GSD 320 — GSD 320 process/TGA-offgas QMS | 1–100/200/300 amu; DL <1 ppm (C-SEM) / <40 ppm (Faraday); heated capillary inlet 200–350 °C; superseded in current catalog by GSD 350 (OmniStar/ThermoStar); quote-only | $$$$ | datasheet | page |
| SLB (Schlumberger) | DQ1000 — DQ1000 wellsite mass spectrometer | Quadrupole MS; H₂ ~50 ppm–15/20 vol% once QC'd; ~90 s cycle; C1–C10 + inorganics; 61 lb portable ✓ | $$$$ | datasheet | page |
| SLB (Schlumberger) | FlairFlex — FlairFlex real-time fluid logging & analysis | GC-MS; dual inbound/outbound extraction at constant thermodynamic condition; lists CO₂/He/hydrogen; C1–C6 quantified, C7–C8 qualified ✓ | $$$$ | datasheet | page |
| SLB (Schlumberger) | MDT Forte / MDT Forte-HT — Wireline formation tester + InSitu Fluid Analyzer / LFA | Forte-HT to ~410 °F (~210 °C), ~31,500 psi; optical H₂S at ~1590 nm; H₂ not detectable ✓ | $$$$ | datasheet | page |
| Stanford Research Systems | QCM200 — QCM200 quartz-crystal microbalance | General-purpose lab QCM (frequency counter + resistance meter); ~$2,795 base; usable Pd-QCM research platform, not an H₂ product ✓ | $$$ | datasheet | page |
| Stanford Research Systems | RGA100 / RGA200 / RGA300 — Residual gas analyzer (QMS) | 1–100/200/300 amu; ΔM₁₀%<0.5 amu; 2×10⁻⁴ A/Torr (FC); MDPP 5×10⁻¹¹ Torr (FC) / 5×10⁻¹⁴ (CDEM); ~US$4,950 base (historical, unverified) ✓ | $$$ | datasheet | page |
| Stanford Research Systems | UGA100 / UGA200 / UGA300 — Universal Gas Analyzer (atmospheric-inlet RGA) | RGA (1–100/200/300 amu) + two-stage capillary pressure-reducing inlet for direct atmospheric-pressure sampling; 6 decades dynamic range; MDPP to 5×10⁻¹⁴ Torr (CDEM); used for trace gas/fuel-cell/glovebox H₂ studies ✓ | $$$ | datasheet | page |
Mud-gas logging & fluid services
Section titled “Mud-gas logging & fluid services”| Vendor | Product / SKU | Key specs | Price | Datasheet | Modality |
|---|---|---|---|---|---|
| Excellence Logging | SAFE fluid logging — SAFE modular fluid-logging platform | Modular upgradeable gas chain (standard→fluid-logging without full swap); states natural-hydrogen exploration know-how / H₂ detection experience ✓ | $$$$ | datasheet | page |
| Geolog | G5 (DualFID) — G5 DualFID light-hydrocarbon gas chromatograph | Dual-FID wellsite GC for C1–C5 light-hydrocarbon speciation; constant-volume mud trap + mud heating + contaminant removal; H₂ channel not confirmed | $$$$ | datasheet | page |
| Geolog | G8 (DualFidStar) — G8 DualFidStar extended-range gas chromatograph | Extended C1–C8+ wellsite GC platform (successor/companion to G5); H₂ channel not confirmed | $$$$ | datasheet | page |
| Geolog | MPD formation-gas system — Modular Platform Drilling gas extraction | CVT-class calibrated extraction by mud type; GC-based; states real-time surface alkene and H₂ detection informs drilling; H₂-specific not confirmed | $$$$ | datasheet | page |
| Halliburton | Baseline 8900 GC — C1–C8 gas chromatograph (GasFact component) | Wellsite GC used within GasFact service for C1–C8 hydrocarbon speciation; H₂ channel not confirmed in materials reviewed | $$$$ | datasheet | page |
| Halliburton | GasFACTS — GasFact advanced gas analysis service | Constant volume+temperature extraction (CVE Thermal Plus); Baseline 8900 GC / 9000 THA; IsoLogger GC-C-IRMS; H₂-specific capability not confirmed in materials reviewed ✓ | $$$$ | datasheet | page |
| Halliburton | IsoLogger — IsoLogger GC-C-IRMS isotopic gas analysis (GasFact component) | Wellsite GC-combustion-IRMS for compound-specific carbon-isotope logging; part of GasFact isotopic gas analysis offering; H₂/δD capability not confirmed | $$$$ | datasheet | page |
| SEMM Logging | Wellsite mud-gas logging — Wellsite mud-gas logging service | Standard mud-gas extraction + gas chromatograph; confirmed 98% H₂ / 1% N₂ / 1% CH₄ at Bourakebougou discovery well | $$$$ | — | page |
Acoustic-wave (SAW/QCM)
Section titled “Acoustic-wave (SAW/QCM)”| Vendor | Product / SKU | Key specs | Price | Datasheet | Modality |
|---|---|---|---|---|---|
| Distran | Ultra / Ultra Pro / Ultra Pro Max / Ultra Pro X — Ultrasound-array acoustic gas-leak imager | 124-element array; Ultra Pro ~0.3 L/h @30 cm (4-bar), 0.3–100 m; Ultra Pro Max ~0.15 L/h; ATEX variants ✓ | $$$$ | — | page |
| Fluke | ii910 / ii900 — Sonic Industrial Imager (acoustic leak camera) | 2–100 kHz; up to ~120 m range; 7" touchscreen; LeakQ/PDQ/MecQ; ii910 ≈ $28,550 new ✓ | $$$$ | — | page |
| SENSeOR | TSA F151/F191 / TA31 — Passive wireless SAW temperature sensors | Battery-less wireless SAW telemetry, thermowell-mount; fielded by RTE for HV equipment; temperature, not gas (proves the SAW platform) | $$$ | — | page |
| Transense Technologies | Global SAW Tag — SAW torque & temperature sensing system | SAW torque/temperature with custom RF ASIC interrogator ('Global SAW Tag'); rotating-machinery/condition monitoring; not an H₂ product | $$$ | — | page |
Integrated instruments & analyzers
Section titled “Integrated instruments & analyzers”| Vendor | Product / SKU | Key specs | Price | Datasheet | Modality |
|---|---|---|---|---|---|
| Axiom Sensing | EVA — EVA (Exploration Vapour Analysis) passive H₂ logger | Passive (non-pumped) continuous soil-gas H₂ + CO₂/T/P logger; diurnal cH₂ correlated with barometric pressure ✓ | $$$ | datasheet | page |
| Axiom Sensing | WHALI — WHALI pumped autonomous H₂ logger | EC H₂ 0–2000 ppm, ±10 ppm; ~300 mL/min pump; solar-capable; weeks-long autonomy; also measures CO₂/H₂S/CH₄/T/P with water management for high-groundwater sites ✓ | $$$ | datasheet | page |
| Crowcon | Portable multi-gas detectors — Multi-gas detectors (cross-sensitivity reference) | Publishes H₂-driven CO false-reading tables (e.g. 18/36/54 ppm at 10/20/30 °C) ✓ | $$$ | datasheet | page |
| ENGIE | PARHyS — PARHyS telemetered soil-gas H₂ station | EC + T/RH compensation, LoRa telemetry; sensitivity ≤2 ppm; T90 <30 s; ≤500 mL/min pump; ~1-yr battery; ~100 units in Brazil | $$$ | — | page |
| Environics | Series 4040 — Dynamic dilution calibrator | ±1% of setpoint, ±0.05% repeatability; MFCs NIST-traceable w/ 11-point linearization; electropolished SS path ✓ | $$$$ | datasheet | page |
| Geo Numeric / ISTerre | MONHyTOR — MONHyTOR buried H₂ soil probe | EC, non-pumping; 0–1000 ppm; 0.1 ppm resolution; ±5% FS; 1 Hz capable; months autonomy; buried ~950 mm; internally RH-regulated ✓ | $$$ | datasheet | page |
| Hermann Sewerin | VARIOTEC 460 Tracergas — VARIOTEC 460 Tracergas leak detector | TCD 0–100 vol% + MOX ppm channel; claimed 0.1 ppm resolution (semiconductor); dual-range 0–10,000 ppmv fine / 0.1–100 vol% coarse; ≥8 hr on 4×AA ✓ | $$$ | datasheet | page |
| Industrial Scientific | Ventis MX4 / Ventis Pro / Tango / MX6 (iBrid) — Portable multi-gas platforms (CO/H₂-low option) | H₂ to ~2000 ppm on CO/H₂-low config; iBrid MX6 ~1–10 ppm precision; publishes cross-interference tables ✓ | $$$ | datasheet | page |
| Leutert | PDSshort / PDSeven / Geothermal Fluid Sampler — Positive-displacement fluid samplers | Geothermal sampler −20…250 °C, titanium, gas-tight, multi-sample; no published H₂-specific tightness spec (ask directly) ✓ | $$$ | datasheet | page |
| McPherson | Model 234 / 302 — VUV monochromator/spectrometer | 200 mm focal length, f/4.5, 1200 g/mm aberration-corrected grating; MCP/CCD detector options ✓ | $$$ | datasheet | page |
| McPherson | Model 632 / 634 — Deuterium VUV lamp | 115 nm–visible; MgF₂ window; 30 W; 2000 h life; lab light-source pricing (contact vendor) ✓ | $$$ | datasheet | page |
| Proserv | PDS / single-phase samplers — Downhole bottom-hole sampling tools | MK II PDS Downhole Sampler (600cc) + PDS-SPS single-phase inert-coated variants; standard & 'exotic' materials, harsh-environment & non-reactive-coating options; wireline slickline/electricline deployment, mechanical clock or surface electric firing ✓ | $$$ | datasheet | page |
| QED Environmental Systems / Geotech | BIOGAS 5000 — BIOGAS 5000 multi-gas analyzer | Optional EC H₂ cell 0–1000 ppm; primary CH₄/CO₂/O₂ channels ✓ | $$$ | datasheet | page |
| QED Environmental Systems / Geotech | GA2000 — GA2000 landfill gas analyzer | EC multi-gas (H₂/O₂/CO₂/CH₄ ± CO/H₂S); industry-standard soil-gas survey instrument; discontinued/superseded by GA5000 (~25% smaller/lighter), no current official datasheet found | $$$ | — | page |
| QED Environmental Systems / Geotech | GA5000 — GA5000 portable multi-gas analyzer | EC H₂ 0–1000 ppmv (±2.5% FS field-validated); IR CH₄/CO₂ ±0.5–1.5%; O₂; K>1000 selectivity; pump 550 mL/min; IP65; ATEX/IECEx/CSA/MCERTS; ~$5,000–8,000 ✓ | $$$ | datasheet | page |
| West Systems | Portable Fluxmeter — Soil diffuse-flux accumulation chamber | Measures CO₂/CH₄/H₂S/VOC; no H₂ channel identified in sources reviewed | $$$ | — | page |
Components & subsystems
Section titled “Components & subsystems”| Vendor | Product / SKU | Key specs | Price | Datasheet | Modality |
|---|---|---|---|---|---|
| Air Liquide | ALPHAGAZ / specialty mixtures — Certified calibration gas mixtures | ISO/IEC 17025 + ISO 17034 certified; % to ppm to ppb accuracy classes; up to 40-component mixtures ✓ | $$ | — | page |
| Airgas | EPA Traceability Protocol gases — Protocol-certified standards | ±2% of tag value (95% CI) per EPA Traceability Protocol (EPA/NIST/industry) ✓ | $$ | — | page |
| AMS, Inc. | Gas Vapor Probe (Retract-A-Tip, 210.01) — GVP driven soil-gas probe | 300/400-series SST; 3/16" ID tubing; slide-hammer or rotary-hammer driven; ~$300/unit (probe only) ✓ | $$ | — | page |
| Coherent | LEAP UV series — LEAP UV ArF excimer laser | 193 nm; mJ-class pulses; kHz rep rates; ~$195,000 for a compact 193 nm research system (vendor-listed) ✓ | $$$$ | — | page |
| Crystran | MgF₂ / LiF windows — VUV-grade MgF₂ and LiF windows | LiF transmission from 105 nm (~40% at 121 nm, solarizes); MgF₂ to ~115–120 nm; $100s–$1,000s per window | $$ | — | page |
| Edmund Optics | LiF / VUV-grade windows — VUV-grade LiF windows (ISP Optics) | Transmission from ~105 nm; ~40% at 121 nm; solarizes with VUV dose; $100s–$1,000s per window | $$ | — | page |
| Entech Instruments | Summa canisters — Summa passivated whole-air canister | GC-MS gold-standard whole-air canister; documented H₂-generation risk from canister-wall chemistry | $$ | — | page |
| FemtoFiberTec | fs-inscribed Type-II FBGs — Femtosecond-inscribed Bragg gratings | fs-laser Type-II FBGs, ~50% reflectivity, 1550 nm, SMF-28; component for custom Pd-coated FBG H₂ sensors | $$ | — | page |
| Gigaphoton | GT40A — GT40A ArF excimer laser | 193 nm, 45 W, lithography-class; lithography-grade systems substantially higher-priced than research units | $$$$ | — | page |
| Hamamatsu | L1835 / L7293 / S2D2 — Deuterium VUV lamps | 115–400 nm; MgF₂ window; photoionization-source variants; lab component pricing ✓ | $$ | — | page |
| Hamamatsu | R821 — R821 solar-blind PMT (Cs-Te) | Spectral response ~160–320 nm; component pricing (price on request) ✓ | $$ | — | page |
| Hamamatsu | UVTron R2868 — UVTron R-series solar-blind UV flame tube | 185–260 nm gas-discharge UV tube; OEM component; detects lighter flame >5 m, H₂ burner flame ~10 m in vendor app testing ✓ | $ | — | page |
| KIN-TEK Analytical | Trace Source permeation tubes — Permeation-tube trace generation | NIST-traceable cert per tube; 500+ compound catalog; ~0.1–200 ppm at ~±1% for well-characterized compounds ✓ | $$ | — | page |
| Labco | Exetainer (12 mL) — Exetainer 12 mL butyl-septum vial | Gas sample vial; not H₂/CO-stable untreated; stable >60 days when modified per method | $ | — | page |
| Linde | Specialty Gas Mixtures / NTRM — NIST-Traceable Reference Material mixtures | NTRM (EPA-recognized equivalent to NIST SRM); custom ISO 17025 mixtures; vendor ±1% NIST-traceable claim ✓ | $$ | — | page |
| nanoplus | DFB laser diodes (2200–2600 nm family) — DFB laser diode sources | Custom wavelength to 0.1 nm across 760 nm–14 µm; enabling source for CH₄/CO/N₂O/HF and the 2121.8 nm H₂ quadrupole-line sensor ✓ | $$$ | — | page |
| National K Works | Vacuum-flask tool housings — Dewar-flask downhole electronics housings | Passive 'buy hours, not days' thermal protection for above-rated-temperature downhole electronics | $$$ | — | page |
| NIST | SRM / NTRM gas standards — Standard Reference Material gas mixtures | NIST-issued SRMs certified via Certificate of Analysis; underlies EPA Protocol Gas traceability chain ✓ | unknown | — | page |
| SKC | Tedlar bags — Tedlar (PVF) gas sampling bags | Reported good stability for H₂, CO, CH₄, CO₂, SF₆; consumable, low cost | $ | — | page |
| SST Sensing | Zirconia Oxygen Sensor System — ZrO₂ closed-loop O₂ sensor | ZrO₂ cell, no reference gas needed; −100…+250 °C housing; 0.1–100% O₂; T90 <4 s; 0.01% O₂ res; 4–20 mA/0–10 V/RS485; up to 10-yr life (O₂, not H₂) ✓ | $$$ | — | page |
| Thorlabs | HC10L/M / HC30L/M — Herriott multipass gas cells | 10.4 m / 31.2 m path variants; protected-gold mirrors; individually vacuum/leak tested; component (~$1k–5k/cell, not re-verified) | $$$ | — | page |
| Thorlabs | MgF₂ windows/viewports — VUV/UV MgF₂ windows | Transmission to ~115–120 nm; >50% at 120 nm; UHV/CF/KF flange options ($100s–$1,000s) | $$ | — | page |
| VICI (Valco Instruments) | D-2 / D-4 PDD — Pulsed Discharge Detector (PDHID/PDD) | Universal He-photoionization mode, low-ppb MDQ for fixed gases; also configurable as selective electron-capture detector ✓ | $$$ | datasheet | page |
| VICI (Valco Instruments) | D-3-I-HP — Pulsed Discharge Detector, high-purity hydrogen configuration | PDHID mode marketed specifically for trace-impurity analysis in high-purity H₂ background; discharge gas separate from carrier so bulk H₂ matrix peak bypasses discharge region for fast recovery; low-ppb MDQ ✓ | $$$ | datasheet | page |
Vendor index
Section titled “Vendor index”| Vendor | Categories | HQ | Products | Status |
|---|---|---|---|---|
| 2Witech Solutions | plasmonic | United States | 1 | research-stage |
| 908 Devices | ms | United States | 1 | active |
| ABB | thermal-conductivity, optical, instruments | Switzerland | 4 | acquired |
| Aeris Technologies | optical | United States | 1 | active |
| Agilent Technologies | gc | United States | 1 | active |
| Air Liquide | components | France | 1 | active |
| Airgas | components | United States | 1 | acquired |
| Alphasense | electrochemical | United Kingdom | 2 | acquired |
| AMETEK Process Instruments | gc | United States | 1 | acquired |
| AMS, Inc. | components | United States | 1 | active |
| AppliedSensor (ams-OSRAM) | work-function | Germany | 1 | acquired |
| Axetris | optical | Switzerland | 1 | active |
| Axiom Sensing | instruments | Australia | 2 | active |
| Baker Hughes / Panametrics | thermal-conductivity | United States | 1 | active |
| Blackline Safety | pellistor | Canada | 1 | active |
| Bosch | mox, work-function | Germany | 2 | active |
| Carl Zeiss | optical | Germany | 1 | discontinued |
| Chromatotec | gc | France | 2 | active |
| Coherent | components | United States | 1 | active |
| Crowcon | instruments | United Kingdom | 1 | active |
| Crystran | components | United Kingdom | 1 | active |
| DD-Scientific | electrochemical | United Kingdom | 5 | active |
| Distran | acoustic | Switzerland | 1 | active |
| Dräger | electrochemical, pellistor, instruments | Germany | 4 | active |
| E/One (Environment One) | thermal-conductivity | United States | 1 | active |
| Eaton / MTL (Crouse-Hinds) | thermal-conductivity | United Kingdom | 1 | active |
| EC Sense | electrochemical | United States | 2 | active |
| Edmund Optics | components | United States | 1 | active |
| Element One | chemochromic | United States | 2 | active |
| Emerson | optical, instruments | United States | 2 | active |
| Endress+Hauser | raman, instruments | Switzerland | 6 | acquired |
| ENGIE | instruments | France | 1 | research-stage |
| Entech Instruments | components | United States | 1 | active |
| Environics | instruments | United States | 1 | active |
| Excellence Logging | mud-gas-logging | France/UAE | 1 | active |
| FemtoFiberTec | components | Germany | 1 | active |
| Figaro Engineering | mox, pellistor | Japan | 5 | active |
| FLIR | optical | United States | 1 | discontinued |
| Fluke | acoustic | United States | 1 | active |
| Fraunhofer IPM | raman | Germany | 1 | research-stage |
| Gasmet Technologies | optical | Finland | 1 | active |
| Gasometrix | ms | Switzerland | 1 | active |
| Geo Numeric / ISTerre | instruments | France | 1 | research-stage |
| Geolog | mud-gas-logging | Italy | 3 | active |
| Gigaphoton | components | Japan | 1 | active |
| GLOphotonics | fiber-optic | France | 1 | active |
| H2scan | pd-resistive | United States | 6 | active |
| Halliburton | mud-gas-logging | United States | 3 | active |
| Hamamatsu | components | Japan | 3 | active |
| Hermann Sewerin | instruments | Germany | 1 | active |
| Hiden Analytical | ms | United Kingdom | 3 | active |
| Honeywell | electrochemical, pellistor, thermal-conductivity | United States | 3 | acquired |
| Industrial Scientific | instruments | United States | 1 | active |
| INFICON | gc, ms | Liechtenstein | 2 | active |
| Infineon | thermal-conductivity | Germany | 1 | active |
| Insplorion | plasmonic | Sweden | 2 | active |
| Intelligent Optical Systems | fiber-optic | United States | 1 | active |
| IS-Instruments | raman | United Kingdom | 1 | active |
| KIN-TEK Analytical | components | United States | 1 | active |
| Labco | components | United Kingdom | 1 | active |
| Leutert | instruments | Germany | 1 | active |
| LI-COR Biosciences | optical | United States | 2 | active |
| Linde | components | Ireland/Germany | 1 | acquired |
| Malvern Panalytical | optical | United Kingdom | 1 | active |
| Mann Teknik (MannTek) | plasmonic | Sweden | 1 | active |
| McPherson | instruments | United States | 2 | active |
| Membrapor | electrochemical | Switzerland | 8 | active |
| Metrohm | raman | Switzerland | 2 | acquired |
| MinEx CRC | optical | Australia | 1 | research-stage |
| mirSense | optical | France | 2 | active |
| MSA Safety | pellistor, optical, acoustic | United States | 4 | active |
| nanoplus | components | Germany | 1 | active |
| National K Works | components | United States | 1 | active |
| NETL (US DOE) | raman | United States | 1 | research-stage |
| NevadaNano | thermal-conductivity | United States | 2 | active |
| New Cosmos Electric | pellistor | Japan | 2 | active |
| Nissha FIS | mox, pellistor | Japan | 3 | active |
| NIST | components | United States | 1 | active |
| NKT Photonics | fiber-optic | Denmark | 1 | active |
| Peak Laboratories | gc | United States | 1 | active |
| Pfeiffer Vacuum | ms | Germany | 2 | active |
| Picarro | optical | United States | 3 | active |
| Posifa Technologies | thermal-conductivity | United States | 3 | active |
| Precise Downhole Solutions | fiber-optic | United States | 1 | active |
| Proserv | instruments | United Kingdom | 1 | active |
| QED Environmental Systems / Geotech | instruments | United States | 3 | active |
| Renesas Electronics | mox | Japan | 2 | active |
| SciAps | optical | United States | 2 | active |
| SemeaTech | electrochemical | United States | 3 | active |
| SEMM Logging | mud-gas-logging | France | 1 | active |
| SENSeOR | acoustic | France | 1 | active |
| SenSiC | work-function | Sweden | 1 | active |
| Sensirion | mox, thermal-conductivity | Switzerland | 2 | active |
| Servomex | pd-resistive, instruments | United Kingdom | 2 | active |
| SGX Sensortech | mox, pellistor, thermal-conductivity, electrochemical | United Kingdom | 9 | acquired |
| SKC | components | United States | 1 | active |
| SLB (Schlumberger) | ms, mud-gas-logging, instruments | United States | 3 | acquired |
| Spectral Sciences | raman | United States | 1 | research-stage |
| SRI Instruments | gc | United States | 4 | active |
| SST Sensing | components | United Kingdom | 1 | active |
| Stanford Research Systems | ms, instruments | United States | 3 | active |
| tec5 (tec5USA) | raman | Germany | 1 | active |
| Technica Optical Components | fiber-optic | United States | 1 | active |
| Thermo Fisher Scientific | optical, ms | United States | 2 | active |
| Thorlabs | components | United States | 2 | active |
| Tornado Spectral Systems | raman | Canada | 1 | active |
| Transense Technologies | acoustic | United Kingdom | 1 | active |
| VICI (Valco Instruments) | components | United States | 2 | active |
| West Systems | instruments | Italy | 1 | active |
| Winsen Electronics | electrochemical, mox, pellistor | China | 6 | active |
| Xcalibur Smart Mapping | raman | Australia | 1 | research-stage |
| Xensor Integration | thermal-conductivity | Netherlands | 1 | active |