The FS20 PIRU flush-mounted sensor is a battery-operated wireless motion detector designed for flush installation, fitting into a standard flush-mounted switch box. Its innovative mirror optics design provides a flat surface with dimensions of 50 x 50 mm, allowing the FS20 PIRU to be integrated into existing installation switch programs using adapter frames according to DIN 49075.

Thanks to its battery operation, the FS20 PIRU can be incorporated into existing installation groups or installed completely independently in a flush-mounted switch box as needed. It features 2 separately programmable FS20 channels, enabling control of all FS20 actuators. Programming of up to 3 sequentially transmitted radio commands via the IR programmer FS20 IRP-2 is possible.

The switch-on duration, brightness threshold for night operation, transmission range, and filter time against false triggering are programmable. The detection angle is 90° horizontally and 15° vertically. The range is approximately 6 meters. The installation depth is 36 mm, and the hole spacing is 60 mm. It includes 2 x 1.5 V micro batteries (AAA/LR03), with a battery life of about 2 years at 1000 transmissions per day.