Soil moisture sensor with 12V relay - HC-13

The sensor to determine the moisture level of the soil. When it exceeds the level set by the potentiometer, the LED lights up and switched are the contacts oc the relay. The system is powered with the voltage of 12 V (coil). The device does not require additional elements such as a microcontroller or driver. The relay's output can be connected directly to the executive system, for example,the fluid pumpor electromagnetic valve.

The device consists of three parts: measuring probe, detector module and wires. The probe needs to be connected with the main module via wires and place them in the soil where moisture will be measured. Power supply of the relay's coil of 12 V should be connected to the VCC and GND pins. The relay contacts are led-out via connectors KF (ARK), to which you can mount the wires usinga screwdriver.

The relay used in module, is a systemSRD-12VDC-SL-Cwith the following parameters:

• Coil voltage: 12 V
• The maximum voltage of contacts: 250 V AC
• Maximum contact's current: 10 A

Detailed information is available in thedocumentation.

• Measuring probe
• Module with relay
• Wires for connecting the probe with the main module