The idea of simply sliding your dishes underneath the kitchen faucet or just placing your hand underneath it to turn on the kitchen faucet brings sheer joy after a day’s hard work. But luckily this is not a part of a magical fantasy anymore, touchless faucets are popular these days for their unmatched ease, convenience and precision. More and more touchless faucets are available in the market at competitive pricing but before you decide to buy one it is important that you understand the science behind touchless kitchen faucets and how they differ from their traditional counterparts.
These faucets use motion sensors that turn on the kitchen faucet by simply waving your hand in front of the sensors. When buying a touch-less faucet, consider the number and location of the motion sensors. These sensors are usually placed at the bottom, near the faucet handle, or on top of the faucet. Wave sensors, usually placed on top of the faucet, detect hand waves, while Ready Sensors, usually placed near the bottom of the faucet, detects objects placed in the sink. Automatic faucets on the other hand use presence sensors instead of motion sensors. They detect the presence of hands under the faucet to turn it on. As soon as you remove your hands from under the faucet, it turns the faucet off. Most of these faucets use an infrared light to detect presence. This infrared light bounces off your skin and sends a signal to the kitchen faucet to turn it on when your hand is under the faucet. A few also use ultrasonic field sensors that detects your hands when the field is broken. Once a sensor detects a signal, the water flow is turned on and off with the help of a solenoid operated diaphragm valve or geared motors to open and close the valve. The diaphragm valve uses a rubber disc to control the flow of water. The valve is normally closed but the solenoid opens it up once the signal is sent so that water can flow out of the spout. Touchless faucets also give you an option of manual operation whereby you can use them like traditional faucets. Water temperature is adjusted by a separate control unit in a touchless faucet. You need to adjust the temperature settings on the optimum temperature and it will stay that way until you change it. The water flow in your faucet is adjusted using the faucet handle. Touchless faucets are either battery operated or work on AC power supply through an adapter while others give you the chance to operate in either way you want. If your faucet requires an AC adapter to power on the motion sensor then you need to have a power outlet near the sink.
Touchless faucets are extremely useful when your hands are messy or are busy holding something as they turn on automatically by sensing your motion. Moreover, they also prevent contaminations caused by touching different things at the same time. However, touch faucets are preferred to touchless faucets, because false activations can occur with hands-free sensing due to so much activity in the kitchen.