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Luminance control in road tunnel


Lum504 measure and control the level of Luminance at road tunnel aplications . The level of Luminance in tunnel should be constand and equivalent to teh level on the road leading in to the tunnel.

However, since there is high level of external light during the day, it is necessary to increase the level of luminance at the enterence of the tunnel mainly to avoid a black hole effect and thus a

reduction in visual perception. At the tunnel exit, the level of luminance  shuld also be increased to avoid drivers being subjected to glare effects by the light outside.


Meas. Range Out 0..10.000cd/m2 / 0.. 500cd/m2 4-20mA
Type of Sensor BPW21
Accuracy 1 %
Spectral Range 550nM
Angel of Acquisition (Elevation) 0...20°
Angel of Acquisition (Azimuth) 0...20°
Elect. Output 1 Ch 4-20mA 350Ohm 5 Ch Relay
Operating Voltage 24v DC %30
Operating Current 50mA
Ambient temprature -40°C ...+70°C
Protection IP68 / SS316
Weight 2540g (w/o cable)
Cable type LICY 11X0,75MM2
Size 395 x 135 (230) x 145 mm

Eu Conformity
EN 61010-1:2010 , EN61000-3-2:2006 , EN60529:1997+A1:2000
EN 61000-3-3:1997+A1:2009 , EN61000-6-1:2007 , EN6000-6-3:200