New from Luxembourg-based IEE is a vision sensor that can be used for people counting, movement detection, monitoring and surveillance of objects, and detection of objects left behind. The IEE #D MLI Sensor System uses technology based on the optical “time of flight” principle. An illumination unit emits modulated infrared light, which is reflected by the objects in the field of view. An array of sensor pixels measures the reflected light. The resulting data is extremely reliable, even in challenging temperature or lighting conditions. The sensor can be used in entrance control, access control, and tailgate detection applications.