Electronic Spices PIR Motion Detector Sensor Module Electronic Components Electronic Hobby Kit

PIR stands for Pyroelectric Infrared Radial Sensor or Passive Infrared Sensor. PIR is an electronic sensor that detects the changes in the infrared light across certain distances and gives out an electrical signal at its output in response to a detected IR signal. It can detect any infrared emitting object such as human beings or animals if it is the range of the sensor, or moves away from the range, or moves within the range of the sensor. PIR Motion Detector Sensor Module. The Passive Infrared Sensor (PIR) sensor module is used for motion detection. It is often referred to using "PIR", "Pyroelectric", "Passive Infrared" and "IR Motion" sensors. The module has an onboard pyroelectric sensor, conditioning circuitry, and a dome-shaped Fresnel lens. It is used to sense the movement of people, animals, or other objects. They are commonly used in burglar alarms and automatically-activated lighting systems.