Sensor taps, also known as automatic or touchless taps, operate through a simple yet effective mechanism that allows water to flow without needing to touch a handle or button.
The Basic Principle
At its core, a sensor tap utilizes a built-in sensor to detect the presence of a user. It has an in-built sensor that detects any movement, such as the showing of hands or any other thing. This detection acts as a signal to activate the water flow.
How the Mechanism Unfolds
Here’s a breakdown of the typical process:
- Movement Detection: The tap is equipped with a sensor, usually an infrared sensor, located near the spout. This sensor emits a light beam (invisible infrared light) that reflects off objects in its path.
- Signal Processing: When hands or another object enter the sensor's detection zone, the infrared light reflects back to the sensor's receiver. The sensor processes this reflected light as a signal indicating presence or movement.
- Water Activation: Upon detection of any such movement, the sensor tap lets out the flow of water. This signal triggers a valve (often an electromagnetic or solenoid valve) inside the tap or under the sink, opening it to allow water to flow.
- Flow Regulation: The operation is sensor-driven, meaning the flow of water is regulated according to the period of movement. Water continues to flow as long as the sensor detects the presence of hands or objects within its range.
- Water Deactivation: When the hands or object are removed from the sensor's detection zone, the sensor no longer receives a reflected signal. This signals the valve to close, stopping the flow of water. Some taps have a slight delay before shutting off.
This hands-free operation makes sensor taps hygienic and helps conserve water by only running when needed.
