As perimeters such as fences or external walls are the first point of entry for intruders, outdoor motion detectors have an important role to play in modern security systems, offering a first line of ...

As an example, [Circuit Valley] has an IKEA Vallhorn motion sensor for a teardown, it’s as you might expect, a passive infrared sensor (PIR) sensor coupled with a Zigbee interface. Inside the ...

The latest version of Lockheed's Tactical Infrared Search and Track system will provide passive threat detection capability to the stealthy F-22 air superiority fighter, in a low-observable ...

(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.

One of the most common first sensors people buy for their home is a motion sensor ... mmWave (a series of radio waves), passive infrared, light, temperature, and humidity sensors.

Jennifer Pattison Touhy has a story on The Verge today about a technology debuting soon that turns existing smart lights into motion sensors: Sensify is a proprietary technology based on wireless ...