Tri-Tech detectors use three different physical detection principles and are used for traffic data acquisition applications requiring enhanced accuracy and high reliability.
The built-in digital signal processor (DSP) combines the signals from all sensor channels resulting in accurate information of all vehicles moving into or through the detection area.

Detection of vehicles with userselectable functions determined by the installation site and specific purpose for
• Vehicle classification
• Counting of all kinds of vehicles
• Speed of passing vehicles
• Presence and queue detection
• Occupancy and time gap detection
in a variety of traffic data acquisition and traffic control applications including detection in lanes with alternating traffic.
The detectors are mounted above the lane and aiming along the direction of travel.

They replace inductive loops in many applications without expensive road works or disruption of traffic flow during installation.

Triple technology combining Doppler Radar, Ultrasonic and Passive Infrared with intelligent logic enables the detector to collect the relevant traffic data including static presence information in case of stationary vehicles.
Adaptive circuitry compensates for temperature and other changing environmental effects.
Data transfer between a data collection unit and one or more detector runs via an RS 485 data bus. The internal data buffer stores the information of all vehicles detected since the last data transfer.
Standard mounting hardware is available for quick, stable and easy installation.