Tunnel Nitrogen Oxide Sensors

The Tunnel Air Quality Monitor by Codel is an essential part of any road or rail tunnel safety system. It uses infra-red techniques to determine NO concentrations and optical attenuation to monitor Visibility levels. It also monitors the atmosphere within the tunnel and ensures that the ventilation system provides sufficient clean air to protect tunnel users' health and for drivers to see the road ahead clearly.

For more information on Tunnel Nitrogen Oxide Sensors talk to Codel International Ltd