Sensor Tap / Sensor Faucet is can easily detect any object like hand and give a command to water valve. Some basic steps are mentation are below:
Yes, Sensor Tap / Sensor Faucet save water, the follow rate of the Sensor Taps is too low as compare to traditional taps. A Sensor Tap generally use a special kind of aerator which is only eligible for sensor based product it will reduce the follow of water and means that much less is needed for washing than is the case with traditional taps.
The sensor is attached and controls the solenoid-activated diaphragm valve located inside the faucet fixture. The solenoid pushes or pulls as an electromagnet, depending on the electric polarity. A rubber disc controls the water flow in a diaphragm valve.
The diaphragm valve is typically held shut until the sensor signals that hands or other large objects have been detected. The solenoid then pulls the valve open to allow water to flow from the spout. When the objects or hands are no longer detected in front of the sensor, the valve is then pushed down and closed.
Some Sensor faucet models can provide hot or cold water, depending on how the fixture is set. However, most touchless faucets simply spout warm water unless otherwise directed.