What are Occupancy Sensors?

What are Occupancy Sensors?

Electronic occupancy sensors have several uses, including improving home and office security and helping reduce energy use, especially lighting, in unoccupied spaces. Occupancy sensors generally combine a motion detector with a timer and electronic light switch to turn on and off lights when they are not needed. For security, they can be linked to an alarm.

Learn more about the types of occupancy sensors Future LED sell, described below.

Types of Occupancy Sensors

We stock two types of motion detectors: passive infrared (PIR), and microwave emitters

Passive Infrared (PIR) Detector

PIR detectors, the simplest type, have a sensor face that measures different air temperatures in a room. PIR detectors are considered passive because they do not emit any light, sound or heat. Computerized sensors inside the detector compare the average room temperature with the increase in heat that occurs when a human walks past the sensor. The PIR detector sends a signal to switch on lights when a person is in the room. Once the room temperature returns to its average value, a signal goes to the light controls to turn the lights off.

Microwave Detector and Occupancy Sensor

Microwave-based detectors make the most reliable occupancy sensors at a reasonable cost. Microwaves emitted from the detector cover a wide range to detect movement and activate lighting controls or an alarm. This type of occupancy sensor works well in spaces with windows. PIR detectors cannot detect movement beyond the windows, because glass blocks infrared radiation, but microwave emitters can. This sensor can activate an alarm or turn on interior lights when people approach home or office windows at night.
See all PIR/microwave sensors here ALL SENSORS