The most important technologies of motion detectors explained.
Do you want the light to automatically come 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 probably came across “PIR” or “HF” sensors.
A motion detector’s job is to detect movement in its monitored area with a sensor. So a motion detector 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 detector) 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.