The TunnelTech 900 is a low-cost precision road and rail tunnel monitor using proven technology to provide accurate and rapid results.

The TunnelTech 201 Air Quality Monitor is an essential part of any road or rail tunnel safety system. Firstly, it monitors the atmosphere within the tunnel and ensures that the tunnel ventilation system provides sufficient clean air to protect tunnel users health and for drivers to clearly see the road ahead. The TunnelTech 201 analyser uses well proven infra-red techniques to determine CO and NO concentrations and optical attenuation to monitor visibility levels. As there is only one moving part, reliability levels are very high and maintenance requirements are extremely low.

The TunnelTech 601 Luminance photometer monitors the average luminance of a tunnel entrance and its surroundings

The TunnelTech 305 Air Flow Monitor (AFM) is CODEL's industry proven tunnel air flow monitor.

The TunnelTech 102 Cold Smoke Monitor detects smoke from a fire to rapidly warn the operator of the hazard.

The TunnelTech 400 analyser electrochemical cell technology determines CO, NO NO2, SO2 or O2 concentrations. With no moving parts, reliability levels are extremely high and maintenance requirements are very low.