发明名称 |
Gas sensor and detection system comprising such a sensor |
摘要 |
Gas sensor consisting of a housing which is divided into two compartments 3 and 4 by means of a fluid filter 2, e.g. a bed of activated charcoal. Compartment 3 has an inlet channel 5 and contains a first gas-sensitive semiconductor 6, the measuring device. Compartment 4 has an outlet channel 7 and contains a second gas sensitive semiconductor 8, being used as a reference device. The value of the electric resistances of devices 6 and 8 will increase or decrease when the compartments 3 and 4 contain either an oxidizing or a reducing gas. The sensor is used in a gas detection system in which an electronic circuit which follows determines the ratio between said resistances and the ratio of the reference device and a reference resistance. These ratios are subsequently compared to certain limiting values, and when these values are exceeded, a detection signal will be produced.
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申请公布号 |
US4644333(A) |
申请公布日期 |
1987.02.17 |
申请号 |
US19840657798 |
申请日期 |
1984.10.04 |
申请人 |
TELEGRAFIE & TELEFONIE |
发明人 |
BARENDSZ, ANTON W.;VAN BEEST, CORNELIS A.;LEUR, ROBERT |
分类号 |
G01N27/12;G08B17/117;(IPC1-7):G08B17/10 |
主分类号 |
G01N27/12 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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