发明名称 |
VERFAHREN UND VORRICHTUNG ZUM NACHWEIS VON BRENNBAREN GASEN |
摘要 |
A method detects the proportion of combustible gas in a mixture of air with a measuring device which operates by both the heat-tone and heat-conductivity methods. The method permits measurement in the full concentration range with a high degree of accuracy and the lowest possible energy consumption. The measuring device is made small and light and its sensor has a long service life. The method uses one single sensor which operates at a low temperature in the heat-conductivity mode or alternatively, catalytically active at a higher temperature in the heat-tone mode. If the measurement provides a result below a reference value or within a reference value window, measurement continues in the more accurate heat-tone mode. When the gas concentration increases during measurement, in order to avoid ambiguity of the measuring signal and damage to the sensor above a load-limit value, measurement again takes place in the heat-conductivity mode by reducing the temperature of the sensor. |
申请公布号 |
DE3635513(A1) |
申请公布日期 |
1987.07.23 |
申请号 |
DE19863635513 |
申请日期 |
1986.10.18 |
申请人 |
DRAEGERWERK AG |
发明人 |
SCHUCK,HANSJOCHEN;JULIAN,DR. IREDALE,PETER;JOHNSON,ALAN |
分类号 |
G01N27/14;G01N33/00;(IPC1-7):G01N27/14;G08B17/10 |
主分类号 |
G01N27/14 |
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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