A hygrometer for soil. This is an easy to use sensor module you can use to sense moisture content in soil, suitable for agricultural projects. It comes with a fork type electrode you can use to measure the electrical resistance of soil. The moisture content in soil affects its electrical conductivity, changing the resistance and therefore this can be sensed using the electrode and the sensor circuit.

Note : this sensor can works with both analog and digital mode. You can connect the analog output (AO) pin to Arduino to read the level of moisture in soil, or digital output (DO) to sense the threshold of soil moisture level. Adjust the potentiometer (a.k.a. trimmer) to set the digital output (DO) sensitivity.

Specific Features

Comes with fork type electrode for measuring the moisture level
The moisture content in soil affect the electrical resistance of soil
The higher the moisture level, the lower the analog reading. You’ll need to calibrate the value by yourself following your case study.

Common Features

Logical IC : LM393
Operating voltage : 3.3 – 5V
Output current : ?15 mA
Adjustable sensitivity via potentiometer
Comes with LED indicators for POWER and OUTPUT
Fixed bolt holes for easy installation

Packing List

1 x soil moisture sensor

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