Soil Moisture Sensor 12V Relay Control Module DC 12V soil moisture sensor relay Automatic watering of humidity starting switch

Humidity is lower than the set humidity start referring to is when soil moisture is lower than setting humidity, the relay will automatically pull in, start the spray, water pumps, etc. do humidifying movement, reaches the desired humidity automatically stop Through the potentiometer adjusting soil moisture threshold control, automatic in garden, garden automatic watering, family flowerpot soil humidity control, all kinds of electronic games, with high power relay, can control large current device, less than setting humidity automatic start relay, greater than setting humidity automatically disconnect and delay function, without delay of critical humidity state relay don’t stop flicker problem solving is a simple and practical soil humidity control system.