The most important technologies of motion sensors explained.
Do you want the light to automatically turn on when somebody approaches the front door or should the light turn on, when somebody is in the staircase? If that’s something you’ve been thinking about you need to install a motion sensor. By that time you’ll come across “PIR” or “HF” sensor technology.
A motion sensor’s job is to detect movement in its monitored area with a sensor. So such a device is literally predestined to turn on light. There are many types of motion sensors: a motion sensor can actively work with electromagnetic waves (e.g. HF or doppler radar), with ultrasonic (ultrasonic motion sensor) or passive with the infrared radiation of the environment (PIR, IR). There are also combinations of these. Many also feature a proximity switch and or even a built-in twilight switch. This turns the light on in response to the ambient light. After a specific timeframe (mostly adjustable) the light switches off again.