A passive infrared sensor (PIR sensor) is an electronic sensor that measures infrared (IR) light radiating from objects in its field of view. They are most often used in PIR-based motion detectors.

Jan 28, 2014 · PIR sensors allow you to sense motion, almost always used to detect whether a human has moved in or out of the sensors range. They are small, inexpensive, low-power, easy to use and …

Mar 17, 2025 · What is the difference between a motion sensor and a PIR sensor? A motion sensor is a general term for devices that detect movement, while a PIR motion sensor specifically detects …

Dec 16, 2024 · This article dives into the world of PIR motion detectors, analyzing top contenders and offering detailed reviews to help you pinpoint the best PIR motion detectors for your specific application.

Jun 17, 2025 · What is a PIR Detector Sensor? A PIR detector sensor is a type of motion sensor that detects changes in infrared radiation levels caused by the movement of objects—particularly humans …

What are Passive Infrared (PIR) Motion Sensors? Passive Infrared (PIR) motion sensors are sophisticated devices that detect movement by sensing variations in infrared radiation within their …

Nov 24, 2025 · The PIR sensor is an electronic component widely used in motion detection. It can sense changes in infrared radiation (that is, heat) from the human body, animals or other heat sources.

Jun 21, 2025 · Passive infrared (PIR) refers to a method of detecting motion using infrared radiation naturally emitted by all objects. Unlike active infrared systems, PIR systems do not emit energy; …

A PIR motion sensor is an electronic device designed to detect movement by sensing changes in infrared radiation. Unlike active sensors that emit energy, PIR motion sensors passively detect heat …

Jan 6, 2026 · What is a PIR Motion Sensor? At its core, a PIR (Passive Infrared) motion sensor is an electronic device designed to detect motion by measuring changes in the infrared (IR) light radiating …