The GESM movement sensor is designed to provide automatic control of lighting, heating or ventilation loads. It detects movement using a PIR sensor and turns the load on. When an area is no longer occupied the load will switch off after an adjustable time-out period. An adjustable internal light sensor provides additional energy saving in lighting applications. When an area is occupied, lighting is only switched on when the level of natural light falls below a pre-set level. When the sensor is first powered up, the PIR sensor will always detect immediately regardless of whether the room is occupied. · · · Easy push button setup that provides auto on/off switching · · Switching with lux level sensing (manual adjustment) · · Time delay function (manual adjustment)