What kind of soil moisture sensors are there

by:Thermistor-Mov     2020-04-13
Moisture sensor is * simple humidity sensor. Moisture sensor mainly include resistive, capacitive two kinds big. The characteristics of the humidity sensitive resistor is in the substrate is covered a layer of membrane made with a sense of wet materials, when the water vapor in the air adsorption on feeling wet film, components of resistivity and resistance value changes, use this feature to measure the humidity. Humidity-sensitive capacitance is commonly made of polymer film capacitance, the commonly used polymer materials such as polystyrene, polyimide, butyric acid, acetic acid fiber. When the environment humidity change, humidity-sensitive capacitance of the dielectric constant change, make its capacitance also produces change, the capacitance variation is proportional to the relative humidity. Dear customer: our company has a platinum resistance, water level controller, pt100 temperature sensor products, you can call our company service special line over the web for more detailed product information, perfect service is our endless pursuit of the United States, welcome new and old customers trust our products of choose and buy, we will serve you wholeheartedly!
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