The Sage Horticultural Balance Arm Sensor – Sensor Unit only is a part of the . It works on the principle of detecting & measuring the evaporation level from your plants and delivering a fine mist to your propagation bed. The sensor works by detecting the moisture as it evaporates off the stainless steel gauze at the end of the arm. The arm is counter weighted & tips upwards as it lightens in weight due to evaporation. At a pre-set position a micro switch is activated and switches a 24 Volt solenoid valve, allowing water to flow to the mist nozzles. When the watering system is running and the mist collects on the Balance Arm leaf, the weight of water tips the arm down to a preset position and turns off the solenoid valve.
When set the Balance Arm Sensor – Complete Kit can run continiously and requires minimum output to operate. The Balance Arm Sensor -Complete Kit can be used with a mains water or pump delivery system. It is best used in conjunction with the .
Please note that the plug provided with the Balance Arm Sensor Unit is not designed to plug directly into a 240V power supply. To work as a system, it will require the Sage Horticultural and to operate.