The passive infrared sensor responds to moving heat sources such as people and vehicles. When the motion detector detects changes in thermal radiation within its detection range, it activates the connected devices, such as lighting, depending on the set light level for an adjustable duration. If the heat source leaves the detection area, the motion detector turns off the device after a preselected time of 3 seconds to 15 minutes. An additional feature is the short pulse, which can be set using the integrated TIME potentiometer located under the sensor's cover ring. This allows, for example, stairwell automation in larger buildings to be activated automatically.