Motion sensors, or motion detectors, increase energy savings and security for your home or office. They can be used on a variety of household equipment such as indoor and outdoor lighting, cameras, sprinklers and light switches. Motion detectors are also frequently used for security purposes such as to activate nightlights, floodlights, gates, locks and alarms. They are easy to install and are highly accurate.
Motion sensors come in either occupancy or vacancy sensing models and use passive infrared technology, detecting movement by infrared light (heat) emitted by a person or animal. In occupancy sensors, the device generates a small electrical charge and turns on lights or appliances when you enter a room or other monitored space, turning them off after a pre-set time period.
Vacancy sensors work in much the same way as a motion sensor light, but instead turn off lights or appliances after an area has been vacant for a specified period of time. In addition to standard infrared motion sensors, active infrared motions sensors, which use an LED and a phototransistor, and ultrasonic motion sensors, which read movement through ultrasonic waves, are available.
When used for household lighting, appliances and equipment, motion sensors can help to increase energy savings by turning lights off in unoccupied rooms or areas or when an area has been left vacant for a user-settable time period. Sensors can also provide convenience through the automatic activation of lighting, heating and cooling, watering and other household tasks and appliances, saving you money without the hassle.