Hydrogen Gas Sensor 2

[JJLo]

Does anyone know of a cheap H2 Sensor with a digital output?

 

[moltenmetal]

A match- detects the presence of hydrogen over a wide range of concentrations, with a digital output: boom if present, no boom if not... <grin>

 

[kjf1]

Try

http://www.neodymsystems.com

http://www.detronics.com

 

[H2powered]

The answer to your question depends on your parameters, chiefly:
1) Range of detection
2) Accuracy desired
3) Price/Volume

H2scan has units that are only sensitive to hydrogen if that's important to you.