Overview
The TunnelTech 601 Luminance photometer monitors the average luminance of a tunnel entrance and its surroundings. 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.
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.
Features & Benefits
- Compliant with Commission Internationale de l'Eclairage, (C.I.E), publication 88, 1990.
- Measurement of tunnel entrance luminance - 0 -6,500 cd/m ².
- Calibrated using standards traceable to UK National Physical Laboratory.
- Accuracy +/-1%.
- Thermostatically controlled heater unit.
- Rugged Aluminium housing to IP66.
Product Specification
| Measurements | Luminance |
| Measuring Units | candela/metre squared – cd/m2 |
| Measurement Range | 0 – 6500 |
| Ambient Temperature | -20°C to +50°C |
| Power Supply | 220VAC or 24VDC |
| Construction | IP65 |
| Analogue Outputs | 1 x 4-20mA current outputs as standard, |
| Photodetector | metal/glass encased silicon diode photocell |
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