Auro motion detectors seamlessly integrate with KNX, Crestron, and Lutron home automation systems. Dimensions Installation only requires an opening of 43 mm / 1,7 in Visible diameter 52 mm / 2.00" ...

Anti-motion detector preventing overdose-related deaths in public bathrooms By J.D. Capelouto Globe Correspondent,June 26, 2018, 1:40 p.m.

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 ins… ...