Start here — overview

This section orients you before you dive into the individual sensor modalities.

Pages, in reading order:

1. Why hydrogen is hard to sense — the root of the whole problem: H₂’s molecular symmetry leaves it with no infrared fingerprint, and this page maps each workaround (thermal, electrochemical, catalytic, optical) to the sensor family it enables.
2. Choosing a sensor — that physics turned into practice: five real deployment scenarios, a decision tree, a master comparison matrix of 18 technology families, and an opinionated, costed kit list for what we would actually deploy today.
3. Reading the specs — a line-by-line walk through real electrochemical and metal-oxide H₂ datasheets, translating each spec into what it actually measured and what it means for a field program.
4. Comparison charts — the same trade space as synthesis pictures: the sensitivity landscape, the confounder matrix, temperature envelopes, and the Raman enhancement ladder.

Start with the physics page if H₂ sensing is new to you; jump straight to the selection guide if you already need to specify or buy hardware.