CDVI's infrared photocells beams, transmitters and receivers are security devices designed to prevent a door or gate from closing on either a vehicle or person in its path. CDVI has a complete solution for you, ranging from standard to adjustable or vandal-proof beams, with detection ranges of 5m (16.4 ft), 10m (32.8 ft) or 20m (65.6 ft) that function under any weather conditions (rain, fog, or dust). The small dimensions of our CDVI infrared photocell beams allow for easy installation.