Smoke detection for early fire detection in road tunnels

         Every minute counts in a tunnel fire: Because the concentration of soot particles increases faster than the temperature, optical sensors can detect a fire very early. The VISIC50SF tunnel sensor uses the scattered light method with protected measurement volume. It is able to achieve such high reliability that its alarms are processed automatically.

  • Visibility (K value) measured according to the scattered light measurement principle
  • Highly available – no moving parts
  • Quick and reliable smoke detection
  • Software developed in accordance with EN 61508 (SIL1)
  • Low faulty alarm rate
  • IP 6K9K enclosure rating thanks to a rugged stainless-steel housing
  • Fog evaporation through integrated heating element (optional)


Making traffic routes more efficient, safer, and environmentally friendly