Emergency LED Floodlight with PIR Motion Activation

PIR sensors work by detecting moving sources of heat in comparison to the ambient "background" infrared radiation, for example people or cars going past. The sensor needs to be angled correctly during installation, taking into account any obstacles which may block its "line of sight" as well as any potential sources of rapid change in heat that may trigger false activation. To help prevent false activations this PIR sensor comes with a special material that can be used to cover parts of the sensor, as described in the manual.

In order to suit any use case the sensor also has two variable dials which can be used to alter the "dusk to dawn" daylight sensitivity and light duration, as per the below diagram. The left-hand dial controls the daylight sensitivity of the sensor, referred to as "Dusk Level" in the manual. When turned fully clockwise, to the Sun symbol, the sensor will detect motion and activate during the day while turning it fully anti-clockwise, to the moon symbol, means it will only work during the night. The right-hand dial controls the activation time of the connected floodlight, referred to as "Delay Time" in the manual, and varies from 5 seconds (anti-clockwise) to 15 minutes (clockwise). For example, to turn the floodlight on for 15 minutes when motion is detected after dusk, the right-hand dial should be fully clockwise while the left-hand dial should be approximately a 1⁄4 turn away from the moon symbol.