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.

Operating principles

All objects with a temperature above absolute zero emit heat energy in the form of radiation. Usually this radiation is invisible to the human eye because it radiates at infrared wavelengths, but it can be detected by electronic devices designed for such a purpose.

The term passive in this instance refers to the fact that PIR devices do not generate or radiate any energy for detection purposes. They work entirely by detecting the energy given off by other objects.

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38 khz Universal Infrared Receiver
Description The 1838B is miniaturized infrared receivers for remote control and other applications ..
Ex Tax: 3.00LE
3D Printer Optical End Stop Switch Module
Description: With high quality 22AWG cable line, the copper wire inside is thick. The cable line..
Ex Tax: 40.00LE
3DU5C Metal Encapsulated Silicon Phototransistor 0.5-1mA 880nM 10V
Product Features Product Name : NPN Silicon Phototransistor;Mode..
Ex Tax: 10.00LE
Advanced IR Movement Sensor Array
This IR compound eye mounted on a pan/tilt assembly can be used by a robot to track movement within ..
Ex Tax: 250.00LE
Arduino photoelectric Encoder sensor module
Photoelectric Sensor Infrared Correlation Sensor Module for Arduino/Raspberry-Pi/Robotics Correla..
Ex Tax: 32.00LE
Infrared Remote Control(with batteries)
Description: Have you ever needed a cheap way to activate something from across the room? Infra..
Ex Tax: 20.00LE
IR Infrared Object Sensor E18-D80NK 3 : 80Cm
IR Infrared Object Sensor E18-D80NK 3-80cm   Electrical Characteristics Working vol..
Ex Tax: 115.00LE
IR Infrared Obstacle Avoidance Sensor
Description :  The sensor module light is adaptable to the environment, the working voltage ..
Ex Tax: 30.00LE
Line Tracking Follower Sensor TCRT5000 x4
Description: 1 sensor uses TCRT5000, high sensitivity 2 four-sensor, four sensor spacing betwe..
Ex Tax: 100.00LE
Line Tracking Follower Sensor TCRT5000 x5
Product Description You can find the TCRT5000 sensor head here, and see its working principle. ..
Ex Tax: 175.00LE
Line Tracking Sensor TCRT5000 Module
Product Description You can find the TCRT5000 sensor head here, and see its working principle. ..
Ex Tax: 25.00LE
MLX90614 Contactless IR Temperature Sensor Module
Description Melexis' MLX90614ESF-AAA is an infrared thermometer designed for non-contact temperat..
Ex Tax: 210.00LE
OMRON E3JK-R4M1 IR 4Meter Sensor
Sensing method Retro-reflective without M.S.R. function Sensing distance..
Ex Tax: 90.00LE
Opto coupler U-type H42B6 photo interruptable switch
Opto-coupler is an infrared transmitter and photo transistor reciever and it take U shape to be fit ..
Ex Tax: 5.00LE