How Do Touchless Faucets Work?

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How Do Touchless Faucets Work?

Like touch faucets, touchless faucets — also called touch-free faucets — use sensors. These sensors are not designed to detect physical touch. Instead, they sense the presence of your hand or something else in front of the faucet. Most hands free faucets do this with an infrared detector paired with an infrared light. When your hand moves in front of the sensor, the infrared light bounces off of your hand and into the detector.

That means all you have to do to turn the faucet on and off is to move your hand in front of the faucet. There are other types of sensors on the market, too, such as ultrasonic field sensors. With these sensors, your hand moving in front of the sensor disrupts the field, signaling the faucet to turn on or off.