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No Philips Hue configuration is complete without the motion sensor, which simply activates your Hue bulbs when motion is detected. It's a glorious way to bypass Siri, and the lights will go out when you leave the room (or stop the movement for longer periods).
$ 40 at Amazon
The Eve Motion Smart Wireless Motion Sensor is a HomeKit enabled motion sensor that uses Bluetooth Low Energy to communicate with the HomeKit configuration. It is powered by two AA batteries, which should easily last over a year.
$ 40 at Amazon
This is the hottest aspect of the sensor on this list, with its blue cat eye display, which is either the Eye of Sauron or the Mad-Eye Moody, the fake-eyed charm. It detects movement, measures the temperature and intensity of light, and has an accelerometer to detect whether or not someone is trying to change it.
$ 70 at Amazon
Not only does ONVIS at economical prices detect motion, but it also monitors temperature and humidity. No hub is required. Two AA batteries will power it up to 15,000 hours.
$ 26 on Amazon
The Philips Hue Outdoor Motion Sensor is the only one around you that is able to keep your areas lit outside. This sensor is mounted almost anywhere with flat and corner brackets included in the box.
$ 50 at Amazon
Blackton Buddy Connect from Eton has multi-function packages in addition to the motion sensor. This handy help also functions as a flashlight and can be switched on automatically when the power is turned off.
$ 40 at Amazon
Switch + from Ecobee is an all-in-one solution that includes movement, temperature, occupancy, light sensor and, of course, a wall light switch. This makes Switch + able to be in the most convenient places in your home.
$ 47 on Amazon
If you already have Aqara Hub, the Smart Home motion sensor is the cheapest sensor around. These tiny sensors can be mounted almost anywhere, thanks to a pivoting base that works on a wall, ceiling or flat surface.
$ 20 at Amazon
If you already have an Ecobee thermostat, you may have some of their smart sensors to work with. While they are made for temperature reporting, these sensors also report movement to HomeKit and can be used in automation, which is a nice surprise.
$ 79 at Amazon
