摘要 |
A humidity sensor which responds to changes in atmosphere water content by changes in electrical resistance, has an electrically insulating substrate, a pair of spaced apart interdigitated electrodes positioned on one surface of the substrate, an electrical lead in contact with each of the electrodes, and a thin film of chloromethylated quaternized polystyrene containing from 3.3 to 8.6 percent chlorine adhering to the electrode surface of the sensor.
|