How do automatic faucets work?
Automatic faucets combine four key components: Solenoid valve, electronic unit (infrared sensor), power source, and faucet body. Solenoid valve: Transforming electrical energy into motion, the solenoid physically starts and stops the water flow. Weon products use “latching” solenoids. The solenoid is initially energized to start the water flow, the plunger is driven into the range of a permanent magnet which in turn holds the plunger in the “open” position. In order to return the plunger into its original “closed” position the solenoid is once again “pulsed” but this time by reversing polarity. This operation conserves battery power, thats why a latching solenoid can be used at electronic faucets powered by batteries or mains. Electronic unit: senses the presence of an object (the users hands) in front of the faucet and sends a signal to the solenoid valve to initiate the flow of water. When the object is no longer present, the electronic unit orders the solenoid valve to terminate the
