The TunnelTech 602 Illuminance photometer monitors the average illuminance within a tunnel in accordance with Commission Internationale de l´Eclairage, (C.I.E.), publication 88, 1990 recommendations, the photometer monitors the average illuminance over a range of 0 – 20,000 lux.
The detector is a metal/glass encased silicon diode photocell which is filtered to give a response that mimics the performance of the human eye. The detector is perfectly linear within its measuring
range and has an instantaneous response to changing light levels.
Compliant with Commission Internationale de l´Eclairage, (C.I.E.), publication 88, 1990
Measurement of tunnel illuminance – 0 – 20,000 lux
Calibrated using standards traceable to UK National Physical Laboratory
Metal/glass encased Silicon photodiode, Vl filtered to human spectral response
Rugged Aluminium housing to IP65