Overheight detectors

Reliable detection of vehicles is the key to future-oriented traffic planning and efficient traffic management. Overheight detectors monitor the height of vehicles, e.g., in front of tunnel portals, low underpasses, or bridges. When the detector signal is linked to a vehicle detection system, stop and alarm signals can be triggered very reliably. The detectors are still capable of detecting the overheight of a vehicle when it is traveling at up to 100 km/h – even in rain, snow, or dusty conditions.

Over 60 years of Tunnel expertise – and setting its sight on the future

As the density of the traffic on our roads increases, the future is all about finding ways to increase the availability of tunnels while at the same time improving safety for road and tunnel users. For 60 years, we have been helping road and tunnel operators to take on this challenge, offering innovative products not only for measuring visibility and air quality in routine operation but also for air f low measurement and smoke detection in emergency situations.

Safe driving in tunnels - from start to finish

Our portfolio of tunnel sensors is designed for urban tunnels, overland tunnels, and tunnels in rail and subway systems. Whether it be routine operation or emergency situations, we are your one-stop-shop for virtually all tunnel monitoring applications.

We measure:

• Air flow: velocity and direction 
• Air quality: carbon monoxide CO, nitrogen monoxide NO, nitrogen dioxide NO2
• Fog monitoring: visual range 
• Visibility: K value 
• Traffic safety: overheight detection, hot-spot detector 
• Early fire detection: smoke