Measuring and testing – Gas analysis – By thermal property
Reexamination Certificate
2006-04-18
2006-04-18
Cygan, Michael (Department: 2855)
Measuring and testing
Gas analysis
By thermal property
C073S025040
Reexamination Certificate
active
07028530
ABSTRACT:
There is provided a gas detector capable of detecting hydrogen concentration and humidity independently in the environment containing both hydrogen and water vapor. The gas detector comprises a high-temp exothermic detector unit and a low-temp exothermic detector unit provided with themosensitive resistors of different self-heating temperatures. The gas detector converts gas-level outputs produced by the high-temp exothermic detector unit and the low-temp exothermic detector unit responsive to the hydrogen concentration and humidity into electric signals, and outputs them after computing electrically levels of the hydrogen concentration and humidity contained in a gas introduced into the two detector units through a gas intake opening.
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International Search Report for application No. PCT/JP03/14849 dated Feb. 3, 2004.
Katsuki Nobuharu
Shoji Rihito
Tada Masaki
Yukawa Junichi
Cygan Michael
Matsushita Electric - Industrial Co., Ltd.
RatnerPrestia
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