Humidity Sensor with the H14DL

Hosted circuit

This circuit is also Crossed to: Voltmeters

A humidity sensor with temperature compensation built-in. Never apply a DC voltage to the sensor, even measuring the sensor with an ohmmeter will damage the device, always ensure that an AC voltage is applied. Avoid condensation, freezing, dust, mist, oil, alcohol, etc. To set up this circuit replace the H14DL with Min Res 22Kohm and Min Res 51Kohm as shown, Acjust RV1 until a voltmeter between output and ground reads 1.40V.

The output will then be as shown in the table to an accuracy of about ~5%.

Datasheet file1: Click here to download BZY88C5V1.pdf datasheet.

Datasheet file2: Click here to download 1N4148.pdf datasheet.

Datasheet file3: Click here to download TL072.pdf datasheet.

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