About the product
Illuminance meter FS-20 is designed for lighting control in open-street traffic areas and especially for the precise measurement of artificial tunnel lighting to ensure proper condition and maintenance. Its cosine-corrected, human-eye-like sensor measures the amount of light falling on a specific area of the road surface.
FS-20 provides analog U/I outputs and serial RS485/232 interface for PLC or tunnel SCADA connection. For alarm handling and outdoor lighting control, 4-channel 230 VAC outputs are available and can also be programmed for pulsed power-line luminaire control. Measuring range, output switching, and time averaging are PC programmable using the provided software.
Its compact polycarbonate or stainless steel housing is wall-mount ready and built for the toughest climate conditions. The 1°-temperature-stabilized sensor chamber ensures high accuracy and minimal aging.
Fields of Use
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Outdoor traffic areas
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Measurement of in-tunnel artificial lighting
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Lighting supervision and maintenance
Product specifications
| Sensor | Silicon photodiode, Vλ filter |
| Dimensions | 160 x 120 x 75 mm |
| Power consumption | < 8 W |
| Temperature range | -40°C to 60°C |
| Analog Outputs | Yes |
| Accuracy | > 3% |
| Measuring range (VPM) | 0 .. 20.000 Lux |
| Full Viewing Angle / Cosine Erro | 180° cos. corrected / < 5 % (0 - 180°), < 3 % (0 - 177°) |
| Spectral match (CIE) | CIE within 4 % |
| Protection degree | IP65 |
Data sheets
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