Monthly Archives: March 2014

New Product Alert – LUMIOS MkIII Luminance Photometer

Fri 28 Mar 2014

Tunnel Sensors releases the third generation luminance photometer, the LUMIOS MkIII, designed specifically for use in tunnels. As with previous generations, the LUMIOS MkIII uses a specially designed, highly light-sensitive photocell, filtered to provide a spectral response close to that … More

New Product Alert – VICONOX NO2, NO, CO and Visibility Monitor

Thu 27 Mar 2014

Tunnel Sensors proudly launches its newest tunnel monitor, the VICONOX Combined NO2, NO, CO and Visibility Monitor. More and more modern vehicles emit less and less CO so there is a growing international requirement to measure the level of both … More

New Product Alert – ECOM Electrochemical CO Monitor

Mon 17 Mar 2014

Tunnel Sensors introduces its first electrochemical gas sensor for the tunnel market, the ECOM Electrochemical CO Monitor. Designed for in-situ monitoring in tunnels or similar confined spaces, the ECOM Electrochemical CO Monitor uses an electrochemical cell to measures the concentration … More

Recent News

News Archive

We have developed a good working relationship and received excellent service throughout the installation and commissioning period. Since then, the instruments have performed very well.

Clive Dyche A.C.M.I.
Medway Tunnels, UK

Tunnel Sensors


The VIPA-L is a long path visibility monitor designed for use in ambient environments such as road, rail or other industrial applications.


The ILLIOS measures illuminance inside the tunnel bore to affect safe lighting conditions for drivers.


The LUMIOS MkIII measures the level luminance, or brightness, at tunnel portals to ensure that the visual perception of drivers is maintained, both day and night.