What is the difference between a motion sensor and a presence sensor? – KNX Association [Official website] (2024)

Table of Contents

How domotion and presence sensors work? Whento use a motion or presence sensor? References

26. Apr 2023

Wouldn’t it be nice to walk into your garden and havethe lights on your terrace automatically turn on, and off again as soon as youleave? Or to be absolutely sure that there are no trespassers stealing yourdelivery packages? By including motion sensors or presence sensors in yoursmart home, you can achieve just that. But what’s the difference between theseapplications and how do they work?

How domotion and presence sensors work?

Motion sensors and presence sensors worksimilarly, as they measure movement in an area, for example in your garden,kitchen or bedroom.

Motion sensors registeractions, such as someone walking into a room, and require more substantialmovement. Presence sensors, however,are more sensitive than motionsensors. They can measure more subtle movements, as they work with higher imageresolutions.

Whento use a motion or presence sensor?

What is the difference between a motion sensor and a presence sensor? – KNX Association [Official website] (1)

It all depends on the lay-out of your home,where you live and how you move about your own space. For instance, if you livein a country where it gets very dark in winter, it’s nice to have your drivewayor garage lights turn on as you park your car. Or to have a night light whenyou’re visiting the bathroom late at night.

Ideally, you would set up a combination ofmotion and presence sensors where they’d be most effective:

Motion sensors in areas that seemore movement, such as hallways or staircases
Presence sensors in areas whereyou’re sitting or lying still, such as a home office, living room or bedroom

Any of these sensors can be used to trigger actions within your smart home set-up, for example turning lights on or off, playing music, activating a home security system or heating appliances.

In short, if you’re thinking about setting upa smart home, don’t forget about adding motion and presence sensors to the mixas well. They can add even morefunctionality and comfort by following the way you and your family movethrough your home.