Automatic faucet or tap (also hands-free faucet, touchless faucet, electronic faucet, motion sensing faucet, sensor faucet, or infrared faucet) is a faucet equipped with a proximity sensor and mechanism that opens its valve to allow water to flow in response to the presence of a hand or hands in close proximity. The faucet closes its valve again after a few seconds or when it no longer detects the presence of hands. Most automatic faucets are battery powered and incorporate an active infrared sensor to detect hand motion.
Automatic faucets are common in public washrooms, particularly in airports and hotels, where they are supposed to reduce water consumption and reduce the transmission of disease causing microbes. They can also be found in some kitchens and in the washrooms of some private residences. Other uses include providing drinking water to pets or livestock, whereby the presence of an animal allows water to flow into a watering trough or dish.
Automatic faucets have the advantage of shutting off automatically after hand washing, thereby reducing water waste. When installed in a home, sensor faucets alleviate the need for parents to ensure that children have turned off the faucet. They can also benefit the elderly and those suffering from arthritis or other mobility limiting conditions since there are no handles to twist or pull. Their automatic shutoff mechanism also greatly reduces the risk of sink overflow due to a faucet being left on either inadvertently or deliberately.
it is also search as Auto Tap, Automatic Tap System, Automatic Faucet as well as Auto Flush System, Automatic Flush System.