湿敏电容一般是用高分子薄膜电容制成的，常用的高分子材料有聚苯乙烯、聚酰亚胺、酷酸醋酸纤维等。当环境湿度发生改变时，湿敏电容的介电常数发生变化，使其电容量也发生变化，其电容变化量与相对湿度成正比。
对高分子湿敏电容元件进行了研究，设计了一种廉价湿度开关电路。
A low cost electronics circuit ior humidity switches based on high polymer humidity sensitive capacitors is presented in this paper.
HM 1500是一种精密湿度传感器。采用HUMIREL公司的专利湿敏电容hs1101设计制造。
HM1500 is an exact sensor of hygrometry, it was designed by what make use of the HUMIREL company patented product HS1101.
通过更换防尘罩，对湿敏电容的适当清洗，调整电位器等处理方法，可使大部分超差湿度传感器恢复正常使用。
Through replacing of dust-proof cover, appropriate cleaning humicap, adjusting potentiometer, most of the humidity sensors can operate normally.
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