The MCR-09 hermetic motion sensor is designed for automatic light control or for controlling any other electric receiver. Its design is based on a state-of-the-art infrared (PIR) motion detector system. The device detects motion in the monitored area within the radius of approx. 12 m, within 180° around the sensor. The design of the device enables its installation outside the building. The field of detection can be adjusted by adequately setting the sensor head. The condition of ambient lighting intensity is additionally checked during operation. If the sensor detects motion and the lighting level is below the preset value, the sensor will switch on the light and start counting the preset time. The motion sensor will switch the light off automatically after counting down to the preset time. However, if it detects movement during the time of countdown, it wil reset the countdown timer. Thanks to its versatile design, the sensor can be used to control the lighting of passageways, staircases, garages or driveways, gardens, warehouses, toilets, halls and utility rooms.