CP Low Profile Microwave Presence/Absence Detector for the automatic control of lighting, heating and ventilation. It provides automatic control of lighting loads with optional manual control and detects movement using a highly sensitive microwave detector. This works by emitting low power microwave signals and measuring the reflections as the signals bounce off moving objects. Functioning as a presence detector, the unit can turn lights on when a room is occupied and off when the room is empty. Optional settings allow lights to be turned off in response to ambient daylight, or to implement a maintained illuminance system.