• Requesting green signal at intersections
  
• Extending green phase at intersections
  
• Traffi c jam and true presence detection
  
• Vehicle counting
  
• Height and distance determination

Using the ultrasound sensor, the DT 372 detector can determine the constant presence of any object in its detection zone by measuring the height difference from the object to the ground. Users also can set an adjustable height threshold to enable the detector to distinguish between “high” and “low” vehicles and count them separately. Dual-tech detectors replace ground loops in many applications without costintensive road work and traffi c interference during installation, maintenance and repair. The units are installed either directly overhead or sideways next to the monitored lane.

• Ultrasound technology combined with passive infrared determines presence and height of vehicles and classifies them high and low.
  
• Data output through relay or open collector.
  
• Automatic self-calibrating routine to ease commissioning.
  
• “Knock” interface allows installer to check alignment and calibration without a computer.
  
• Installation, configuration, maintenance and analysis can be done by the ASIM-T software via the RS 485 interface.