There are two main types of humidity sensors: one is resistance humidity sensor, whose outer film is made of humidity sensing material, which can absorb humidity<br>Collecting the water vapor in the air, the amount of water vapor adsorbed on the film changes with the humidity of the environment, so that the resistivity of the element changes. through<br>The humidity can be calculated by measuring the change value of resistance. The second is the capacitive humidity sensor, which is made of a layer of polymer capacitor and has a thin film capacitor<br>The permittivity changes with the humidity of the environment. The humidity of the environment can be calculated by measuring the permittivity<br>
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