KEMO Soil Moisture Sensor 12 V/DC (M173)

This soil moisture sensor switches on when dry and is thus suitable for operating pumps and valves.

• Switching threshold continuously adjustable

This sensor switches on your garden irrigation pump or solenoid valve when the soil is dry, and switches off when there is enough moisture in the soil. The measuring head is buried in the ground at the depth where it should measure and is connected to the base unit via a cable. Approximately 2 m of cable is included, but the sensor cable can be extended up to 20 m with normal 2-pole cable.

The device is operated via a standard plug-in power supply (12 V DC stabilized, > 130 mA, 3.5 mm jack plug). If the garden should only be watered at certain times of day or days of the week, please plug a standard timer before the plug-in power supply and program it accordingly. When the soil moisture sensor receives power from the power supply, it starts working.

After switching on the operating voltage, the soil moisture is measured. If the soil is too dry, the connected pump is switched on for 18 - 30 minutes. If the soil is sufficiently moist, the device goes into "Pause" for about 18 - 30 minutes and then takes a new measurement. This continues as an endless loop until the operating voltage is switched off.