(Passive InfraRed sensor) A device used to detect motion by receiving infrared radiation. When a person walks past the sensor, it detects a rapid change of infrared energy and sends a signal.

While PIR sensors are inexpensive, radar technologies are decreasing in cost and becoming more compact and simple to design. Radar solutions can range from simple motion detection to complex imaging ...

Smart home sensors don't just help keep you safe -- with the right tricks they can spot pest activity and entrances, too.

Blue Line Gen 2 Motion detectors include the passive infrared (PIR), the Quad PIR detectors and the TriTech ... assuring no coverage gaps up to twelve meters (40 feet) away from the detector.

Unique clip-on pet pattern mask. Adjustable 1, 2 and 3-pulse counter virtually eliminates false alarms. Sealed optical chamber protects sensor from insects and air currents. Temperature compensation ...

this DIY motion trigger for a DSLR is a quick and easy build, and probably loads more fun. The BOM on [Jeremy S Cook]’s build is extremely short – just a PIR sensor and an optoisolator ...

Our Top PicksMost Versatile Motion Detection CamerasLorexKnown for their well-built, well-designed equipment, Lorex leads the ...

It comes with a PIR motion sensor that will automatically activate when it detects motion within 30 feet. Equipped with 3 D-cell batteries you can install them in big bathrooms, porches ...

Find out what tricks can help you beat the bugs. Yes. Most smart home motion sensors use PIR, or passive infrared technology, ...