VIENNA, Va. and OREM, Utah—After a successful six-month beta test, Alarm.com this week announced the general availability of its Image Sensor—a wireless device that combines a motion detector with a ...

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Recently, I exhausted my stock of common passive infrared (PIR) motion sensor modules and was looking for a new one to play with. I searched the web for a small type with self-contained electronics.

We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› By Megan Wollerton After a round of testing we’ve added many new picks: the ...