Description

    The humidity sensor is made of high polymer humidity sensitive material. In wet conditions, water molecules are adsorbed by polar group on the surface of martial. And as the humidity increases, the quantity of water molecules will be changed accordingly. The adsorbed water is gradually condensing and coming into be liquid, which is electrolyte solution with current channel quality. 

  With the humidity increasing, macromolecule will swell, interior free volume will be bigger, carrier will be increased and the activated energy of macromolecule polyelectrolyte counterions will decrease, drift mobility will increase and impedance will decrease. And then when humidity decreases, water molecules are released from ion polymer and the resistor of material will increase. The environment humidity can be monitored through testing the impedance

Technical specifications

Basic circuit

    Implementation principle: Use the IO port of the microcontroller to output a 1KHz square wave to charge the capacitor through R1. When the IO port detects a low level inversion to a high level, the charging time is recorded and the current humidity value can be obtained through calculation.

TenSensor, China's first listed gas sensor company,Tensensor can provide more than 100 varieties of six series including：

semiconductor gas sensor

electrochemical gas sensor

infrared gas sensor

dust sensor

pyroelectric sensor

thermopile sensor, etc. 

which can be used for more than 200 kinds of gas and infrared, dust and other indicators detection, widely used in the field of security for  detecting gas leakage, noxious gas leakage, smog and fire, the field of family, office and factory for detecting HCHO, VOC, CO2, PM2.5 and so on. 

Moreover, the solutions for security, household electrical appliances, consumer electronics, smart home, instruments and meters are available.

For more information about The humidity sensor, please contact  account manager.

 TEL：0086-0351-5249552

 Whatsapp：+86 18335818384

 Email：[email protected]