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![TunnelTech 601 Luminance Photometer](https://images.findtheneedle.co.uk/findtheneedle/products/7645794.jpg)
Codel's innovative TunnelTech 601 Luminance Photometer has been designed to successfully monitor the average luminance of a tunnel entrance as well as it's surroundings. Made in accordance with Commission Internationale de l?Eclairage, (C.I.E.), publication 88, 1990 recommendations, the photometer monitors the average luminance within a 20 degree angle over a standard range of 0 ? 6,500 cd/m2. It incorporates a perfectly linear detector that has a metal/glass encased silicon diode photocell which is filtered to give a response that mimics the performance of the human eye.
For more information on TunnelTech 601 Luminance Photometer talk to Codel International Ltd
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