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.

Staff Sgt. Jacob Rascon, right, and Sgt. David Hendrixson, both assigned to 3rd Brigade Combat Team, 101st Airborne Division (Air Assault), analyze prototyped cyber field equipment during Cyber Quest ...

Taiwan’s F-16 fleet to receive 55 Lockheed Martin Legion IRST pods, adding passive airborne tracking and collaborative ...

Sensor-based passive RFID tags have been on the market for just a few years, but according to U.K.-based market-research firm IDTechEx, they have accomplished sufficient growth in niche markets that ...

We may earn a commission from links on this page. According to the release, the P2 uses an ultra-wide passive infrared sensor and illumination sensor and claims to provide light detection up to 23 ...

“We wondered whether we could repurpose RFID tags to do battery-free sensing and tracking,” says Nagarjun Bhat, a Ph.D. student in electrical engineering and lead author of a new study. Data is power.

UC San Diego has developed a system that uses analog sensors with a direct interface to RFID tags, making them passive sensor devices. The solution includes analog to digital conversion without ...

Sensors vary widely and can monitor and detect a variety of sources, such as light, heat, motion, moisture, and pressure. Typical sensors used in smart cities can sense temperature, proximity, ...