- Usually, a solenoid-actuated diaphragm valve is used to start and stop the flow of water.
- The spout holds optical fiber cables that attach it to the presence sensor. Then, the presence sensor conveys its signals through this fiber optics. The spout may also include batteries in some models.
This is, in a nutshell, how a touchless faucet works.
Simply, when the presence sensor or light sensor detects an object, it permits the solenoid which pulls the valve to begin the water flow.
If it does not detect the same thing or anything in front of it, it orders the solenoid that will stop the water flow after a period of time (around 30 seconds) by pushing the valve.
In addition to that, these touchless faucets not only save water, but they are great in preventing the spread of bacteria which leads to illnesses.
Moreover, this faucet is well-organized compared to regular faucets as it lets you use both hands while washing dishes.