The motion sensor ⁄ presence detector KINASGARD® ABWF detects the presence of persons and movements. It is used for monitoring and detecting statuses and for motion-dependent control of room functions, e.g. as a motion detector for lowering the temperature of unused rooms. The motion sensor is used in corridors, in outdoor areas, in industrial halls, in offices and residential and commercial premises. The sensor detects motions over an aperture angle of 110° and a perimeter of 360°. The patented lens system with 20 individual lenses results in only very small dark areas that are only a few centimetres wide even at a distance of 10 m, thereby reliably detecting small movements. The sensor recognizes changes in the infra-red radiation spectrum, so in heat radiation, resulting form the movement of persons or objects. Such movements generate a temporary change of the temperature gradient in the field. Due to the constant presence of body (heat) radiation, this sensor is ideally suitable for detecting persons. The temperature difference between sensor and object must be > 5 K.