Humidity, the amount of water vapor in the atmosphere. It has a close relationship with people's life and industrial production and the growth and survival of animals and plants. In order to create a comfortable living environment and ideal production conditions, air humidity must be controlled and adjusted. And that first requires us to test the air. Humidity sensors are made based on the physical effects or chemical reactions of the functional materials that can occur with humidity. It has the ability to convert humidity physical quantities into telecommunications. These functions can be achieved by changes in resistance or capacitance associated with humidity, expansion of length or volume, and changes in some electrical parameters of the junction device or device. Humidity sensors are widely used in the military, meteorology, agriculture, industry Especially in textile, electronics, food industry, medical, construction and household electrical appliances and so on need to humidity monitoring, control and alarm of various occasions, such as air conditioning system, wet room control system, monitoring system such as warehouse. The need of humidity monitoring and control has promoted the research progress of humidity sensor.

Packet : 29782196policeandairhumiditymeasurementsystem.rar filelist
空气湿度测量与警系统的设1.doc

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