Lamp-post-mounted single masked infrared barrier, with 3 TX beams and 3 RX beams, in container for mounting on the ground or in pocket art. 30008533, height 1.6 metres, lamp fitting diameter 60mm, maximum range 100 metres with unobstructed view, supply voltage 12-16V DC, consumption 135mA, TX and RX cable synchronisation required, wiring accessories for IP54 waterproof outdoor installation, operating temperature -25 to +65°C with thermostat control 50W 24V AC, output relay for alarm, tampering and exclusion.