Siemens motion switch delta 290 ap white anthracite ip55 siemens 5tc7212 the siemens 5tc7212 is a surface mounting delta reflex motion detector that will detect any movement within its range it will automatically activate and deactivate an electrical device which is connected to it for example a light or an alarm in addition a red led integrated in the sensor indicates by flashing when a motion is detected the motion detectors has a 290deg detection radius and can be wall or ceilin