Looking for a comercially available, econimical H2 sensor that can detect up to 20,000 ppm either in air or a vacuum.
Also be operational from -40deg. C to +55deg. C. Other gases would be Acetylene and Methane if possible.
I am looking for information about an electronic sensor used to detect the amount of gas within a Buchholz relay. Does anyone have experience with this type of device?