OPTICAL PREEMPTION DETECTORS

Optical Preemption Detectors sense the infrared optical pulses emitted by properly equipped emergency or transit vehicles. Mounted to observe the approaches of an intersection, DETOC Series Detectors are used with TOMAR OSPOC Series Optical Signal Processors or *GTT OPTICOM brand phase selectors, while 4090 Series Detectors are used with TOMAR 4000 Series Optical Signal Processors. Both are used to inform the traffic control system of the presence of designated vehicles.