发明名称 |
Volatile organic compound sensors |
摘要 |
A novel, inexpensive sensor and method for detecting volatile compounds in the gas phase at concentrations of less than about 500 ppm in ambient air are provided. The sensor comprises (a) a dielectric substrate having a major surface; (b) a pair of electrically conductive electrodes disposed on the major surface of the substrate; and (c) a conductive polymer covering the pair of electrically conductive electrodes, with the conductive polymer doped with appropriate dopants in measurable excess of that stoichiometrically required to change the conductive polymer from a neutral state to a charged state to provide requisite conductivity. A method for making the sensor is provided, as is a method of use of the sensor which relates to its use in a monitoring system comprising a means for measuring the conductivity of the sensor connected to a warning means for providing an indication when the conductivity reaches a predetermined level. Contemplated specific methods of use include the detection of fugitive emissions in chemical plant environments; the detection of certain pollutants in vehicle exhaust; and the detection of certain pollutants near chemical handling operations, such as painting operations./!
|
申请公布号 |
US5756879(A) |
申请公布日期 |
1998.05.26 |
申请号 |
US19960685997 |
申请日期 |
1996.07.25 |
申请人 |
HUGHES ELECTRONICS |
发明人 |
YAMAGISHI, FREDERICK G.;STANFORD, THOMAS B.;VAN AST, CAMILLE I.;MILLER, LEROY J. |
分类号 |
G01N27/12;(IPC1-7):G01N27/00;G01N7/00;C08F283/00;B05D5/12 |
主分类号 |
G01N27/12 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|