发明名称 |
Method of making a nitrogen dioxide sensing element |
摘要 |
A method of making an element for sensing the presence of nitrogen dioxide gas in the environment. The element is formed by heating a film of an electrically non-conductive polyaromatic polymer to a temperature sufficiently high to pyrolyze the polymer and render the polymer semi-conductive. The pyrolyzed film is mounted on an electrically non-conductive base. Electrical leads are attached at spaced locations to the film and are connected in an electrical circuit with a signalling or control mechanism. The presence of nitrogen dioxide gas will cause a change in the electrical characteristics of the film to thereby activate the mechanism. A heating element can be associated with the base to insure constant temperature and humidity conditions.
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申请公布号 |
US4236307(A) |
申请公布日期 |
1980.12.02 |
申请号 |
US19780956884 |
申请日期 |
1978.11.02 |
申请人 |
JOHNSON CONTROLS INC. |
发明人 |
COLLA, JEANNINE O.;THOMA, PAUL E. |
分类号 |
G01N27/12;G01N33/00;H01C17/20;(IPC1-7):H01R43/00 |
主分类号 |
G01N27/12 |
代理机构 |
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地址 |
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