When a person walks past the sensor, it detects a rapid change of infrared energy and sends a signal. PIR sensors are used ... back a radar signal or transmit light to a photodetector in the ...

Most of us would probably expect to see a PIR sensor, but this light is motion sensing with microwaves. We have seen such units tested in the past, which links to a video [hclxing] also references.

System OverviewThis PIR model is an indoor/outdoor dual detection camera which uses both video and infrared sensor to achieve accurate motion detection functionality. It also supports active ...

"Our ISI sensor range offers a blend of simplicity and performance that sets it apart in the market,” said Kevin Johnstone, COO. "Designed as an energy-efficient PIR sensor solution, our product is ...

Get close enough to this raven and you’ll set off the PIR sensor, which triggers lighting ... and of course, thunder. The light comes from a whopping 10-watt, 12-volt power LED.