Soil Humidity Sensor 12VDC

This sensor switches your garden irrigation pump or the magnetic valve on when the soil is dry and switches off when there is enough humidity in the soil. The measuring head has to be buried into the ground at the depth where it has to measure and has to be connected with the basic device by cable. Approx. 2m of cable are included, the sensor cable may, however, be prolonged up to 20m with normal 2-pole cable. The device is operated by means of a commercial plug power supply (12VDC stabilized, > 130mA, jack plug 3.5mm). If the garden should be irrigated at certain times of the day or weekdays only, then please put a commercial timer before the plug power supply and program it accordingly. The soil humidity sensor starts to operate when it receives current from the power supply.

Operation sequence:
The soil humidity is measured after switching on the operating voltage. The connected pump is switched on for 18...30 minutes if the soil is too dry. If the soil is humid enough the device switches to „Pause“ for about 18 - 30 minutes and takes a new measurement after that. This continues as infinite loop until the operating voltage is switched off.

The basic device has to be mounted in a dry place.

Operating voltage: 12VDC stabilized > 130mA, 3.5mm jack
Display: 3 LEDs: On ... Off ... Pause
Switching contact: potential-free relay contact 1x On max 3A (up to 25V or 230VAC, see description)
Connectors: screw terminals
Time delays: approx 18 – 30 minutes between
Switching threshold: continuously, adjustable
Dimensions soil humidity sensor: approx 30 x 64mm plus 2 galvanized meta pins approx 4 x 40mm
Dimensions basic device: approx 72 x 50 x 28mm (without fastening straps)
Info as pdf file
Make: Kemo
EAN 4024028031736

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