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" sensor. The module has an on-board 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.
Applications:
Automatic lighting hallways, corridors, bathrooms, basements, warehouses, garages, and other places, automatic ventilation exhaust fan and other electrical appliances (incandescent, fluorescent, buzzer, automatic doors, electric fans, dryers and automatic washing machine) especially for use in businesses, hotels, shopping malls, warehouses, sensitive areas or security zones and alarm systems. Can also be used for security purposes.