Hydrogen gas detector

Details Hydrogen gas detector Hydrogen gas detector

G - Physics

01

N

73/63

G01N 25/32 (2006.01)

Patent

CA 1124101

- 12 - Case 4250 HYDROGEN GAS DETECTOR ABSTRACT OF THE DISCLOSURE A differential thermocouple hydrogen gas detec- tor (10) is provided by coating one thermocouple junction (34) of a differential thermocouple pair (34, 36) with a Palladium-Silver alloy catalyst (46) and the other thermo- couple junction (36) with a non-catalyst (52). Heated hydrogen gas reacts with the catalyst (46) to liberate heat to the catalyst coated thermocouple junction (34) in proportion to the concentration of hydrogen gas and proportionally raise the temperature of the catalyst coated junction (34) above that of the non-catalyst coated junction (36). The output signal (44) from the differential thermocouple device (34, 36) thus provides an output signal indicative of the concentration of hydrogen gas.

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