Conrad Components 195731 Float switch Assembly kit 12 V DC

For all liquid-level-controls, such as an automatic flower watering plant: By means of two electrodes (sheet strips, rust-free wire), which you simply insert in the ground of your flower bed or flower pot, the ohmic resistance of the garden ground or of the soil of the flowers is measured. When the resistance of the soil increases as a result of drought a relay switches, for example, a small water pump.