发明名称 |
Catalytic detecting apparatus for detecting combustible gases and vapors |
摘要 |
Apparatus for detecting combustible gases and vapors, and comprises catalytic sensors selectively sensitive to the presence in a given environment of a potentially dangerous constituent such as a hydrocarbon gas and arranged to produce a signal representative of the presence of the constituent, a normally deactivated transducer responsive on activation to the output of the sensors and effective to produce an output signal indicative of the presence of the constituent in a concentration above a predetermined level, a pulse generating circuit arranged automatically and periodically to activate the sensors for a selected relatively short interval during which detection but not poisoning can occur and subsequently to deactivate the sensors for a relatively long period, fault detecting circuits for producing a fault signal in the event of circuit failure or impending power failure, and alarm circuitry for providing a differentiated warning in response to the fault signal and in response to the output signal.
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申请公布号 |
US4020480(A) |
申请公布日期 |
1977.04.26 |
申请号 |
US19750570073 |
申请日期 |
1975.04.21 |
申请人 |
NEOTRONICS LIMITED |
发明人 |
GOTLEY, PAUL;BUCKENHAM, HOWARD ALFRED |
分类号 |
G01N27/04;G01D3/08;G01N27/16;G01R17/10;G01R19/165;G08B17/00;G08B17/10;G08B17/117;(IPC1-7):G08B17/10 |
主分类号 |
G01N27/04 |
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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