What is a PIR Sensor?
A PIR sensor (Passive Infrared sensor) is a motion detection device used to sense movement of people, animals, or objects by detecting infrared radiation (heat) in its environment. Commonly used in security systems, automatic lighting, and smart home devices, PIR sensors are energy-efficient and cost-effective. Unlike active sensors, PIR sensors don't emit any signals—they simply detect infrared energy changes caused by moving heat sources. This makes them ideal for motion-activated systems where reliability and low power consumption are crucial. Whether you're building a DIY home automation project or installing commercial motion detectors, PIR sensors offer accurate and passive motion detection.
