The response of the Sandia Robust wide range hydrogen sensor to H{sub 2}-O{sub 2} mixtures
The Sandia Robust Hydrogen (SRH) sensor can detect partial pressures of H{sub 2} over a wide range ({approximately}1 ppm to pure H{sub 2}) because it employs two different kinds of catalytic metal sensors. A Field Effect Transistor (FET) with a catalytic gate detects low H{sub 2} concentrations and a resistor of the same metal is accurate for the higher concentrations. The use of Pd alloys with Ni preserves sensor reversibility by preventing the hydride phase transition under normal operating conditions. Mixing O{sub 2} with H{sub 2} does change the sensor signal under some conditions and comparisons of the behavior of a pure Pd device with a Pd/Ni device is given. The H{sub 2} concentration in flammable mixtures can be obtained, but an additional sensor is needed to measure the concentration of oxidant.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 10160264
- Report Number(s):
- SAND--94-0047C; CONF-9406166--4; ON: DE94013763; BR: GB0103012
- Country of Publication:
- United States
- Language:
- English
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