Description A PIR (Passive Infrared) motion sensor is an electronic device used to detect movement by sensing infrared radiation emitted by living beings. It works by measuring changes in infrared levels caused by motion within its detection range, typically up to 20 feet. PIR sensors are widely used in security systems, automatic lighting, and smart home devices due to their low power consumption and reliability. When a warm object, like a person, moves across the sensor’s field of view, it triggers a signal to activate a connected device. Compact and cost-effective, PIR sensors are an essential component in modern motion detection applications.
