Pyroelectric IR Motion Sensor (RE200B) - PIR Sensor

Regular price $3.95

The PIR sensor is the most common used device for detecting motion. Have you seen motion-controlled light switches in public restrooms or patio lights of a house? These are paired with a PIR sensor–which uses changes in Infra-Red light to trigger a digital signal–to become active if there's motion detected.

Please note that this listing is for the standalone sensor, most DIY electronics enthusiasts will want to use a PIR Board, which includes the sensor and everything needed to connect to a microcontroller board or single-board computer.

More specifically, the sensor detects IR radiation on the basis of the characteristics that the polarization of pyroelectric material changes with temperature. It also includes compensation for preventing false readings due to temperature variation.

These sensors can be found in a wide range of applications such as security systems, burglar alarms, visitor acknowledgement, light switch control, and 'smart' toys. You can simply connect them to a digital pin on your favorite microcontroller board (e.g., Arduino) or single-board computer (e.g., Raspberry Pi), and get started detecting motion around them!