Motion and presence sensors
A motion sensor lights up the hallway when you walk in, and a presence sensor keeps the light on even while you sit at your desk. They are the basis of automatic lighting, heating and home security.
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Motion sensor or presence sensor?
A PIR motion sensor reacts to the movement of a warm body – cheap, efficient and ideal for hallways, stairs and entrances. A presence sensor with mmWave radar detects even tiny movements and breathing, so it knows someone is in the room even when still – perfect for living rooms, offices and bathrooms.
- Battery PIR sensors – Sonoff SNZB-03, Shelly BLU Motion, FIBARO Motion Sensor.
- mmWave presence sensors – Shelly, Sonoff SNZB-06P, Aqara FP and MOES, USB or 230 V powered.
- Multi-function – many also measure light level and temperature.
- Outdoor – IP-rated sensors for the garden and entrance.
Pair sensors with Homey, Home Assistant, Aqara or Sonoff. For home security see also Ajax alarm.
Frequently asked questions
Does a motion sensor react to pets?
Some PIR sensors have adjustable sensitivity, but larger dogs may still trigger them. mmWave sensors detect any movement.
Where should I place a presence sensor?
On the ceiling or wall with a view of where you spend time – sofa, desk or bed.
How long does a PIR sensor battery last?
Usually 1 to 2 years. mmWave sensors are powered continuously by USB or 230 V.