Lumios

The LUMIOS measures the level of luminance, or brightness, created by natural light at the tunnel entrance / exit to ensure that the visual perception of drivers will be maintained, both day and night, by avoiding sudden variations in lighting levels and potential “black hole effect” when entering and exiting a tunnel.

The LUMIOS uses a specially designed, highly light-sensitive photocell, filtered to provide a spectral response close to that of the average human eye, to react to changes in light levels within the tunnel environment. This reaction is virtually instantaneous. The light receptor measures the average luminance within an acceptance angle subtending 20º, (as recommended by Commission Internationale de l´Eclairage, (C.I.E.), publication 88, 1990), over two measurement ranges; 0 - 6500 cd/m2 and 0 - 10,000 cd/m2.

The LUMIOS is a self contained intelligent analyser and the measurements are converted into an output signal of 4-20 mA (directly proportional to the luminance measurement) for hard wire connection and signal transmission to a host controller. The LUMIOS also comes with alarm relay contacts and ModBus serial communications protocol. The LUMIOS has been designed to enable it to withstand extremes of weather conditions. The complete electronic system is contained within a water-proof, heated housing of powder coated steel with an IP66 protection rating. The LUMIOS has an operating temperature range from -30º - +70ºC which ensures stable readings across all prevailing ambient temperature conditions.

Various optional extras are available such as, mounting brackets and wash-wipe systems, providing solutions for the most demanding specifications.