The SPIR-F/C is a surface mounted Movement Sensor, that can be easily mounted onto a single gang standard back box. The SPIR-F/C presence detector uses PIR motion-sensing technology to provide automatic control of ventilation, heating and/or lighting systems with a fully adjustable automatic time-out feature. The SPIR-F/C ceiling mounted presence detector can be easily mounted onto a single gang standard switch box either surface or flush mounting. The SPIR-F/C presence detector switches are designed to provide automatic control of lighting, heating or ventilation loads. They detect movement using a PIR sensor and turn 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 the unit is first powered up the PIR sensor will always detect immediately regardless of whether the room is occupied.