This motion detector alarm can detect a moving person from a distance of 1 meter. It uses a dual IR Transmitter-Receiver module HOA1405. When the sensor detects the reflected IR rays, alarm will sound ...

The “snooper” here is an ordinary passive infrared (PIR) motion detector module that detects motion by measuring changes in the infrared (heat/black body radiation) levels emitted by objects (people ...

A gangly-looking motion detector floodlight is fine for scaring off a backyard intruder, but it doesn't look good on your ...

The DDI602U-F1 outdoor motion detectors use two independent passive infrared sensors to detect and confirm movement. The DDI602U-F1 is enhanced with a microwave sensor module which increases ... to ...

Your garden variety motion detector uses IR, but these days, there are fancier technologies for achieving similar goals. If so desired, you can source yourself a microwave-based presence sensor ...

We may earn a commission from links on this page. One of the most common first sensors people buy for their home is a motion sensor. But in almost all cases, you want a presence sensor instead.