Visibility meter Campbell Scientific CS120A

The CS120A uses tried-and-tested, infrared forward-scatter technology, and it uses the proven 42° scatter angle to report meteorological observable range (MOR) for fog and snow in the range 10 to 75,000 m. It combines a high specification with a very competitive price. The CS120A is ideal for stand-alone applications or in combination with automatic weather stations in road, aviation, solar-energy, and wind-energy environments.

For aviation applications, users can be assured that the CS120A complies with CAA and ICAO guidance and meets or exceeds all recommendations and specifications. (This includes CAP437, CAP670, and CAP746.)

The CS120A is certified by Deutscher Wetterdienst as suitable for use to control wind turbine obstruction light systems as specified by 506/04, General Administrative Rules for the Identification of Aircraft Obstructions.


Principle of function infrared forward-scatter technology
Reported Visibility (MOR) 10 – 75 000 m
Accuracy ±8 % (at 10 m...600 m), ±10 % (at 600 m...10 000 m), ±15 % (at 10 000 m...15 000 m), ±20 % (at 15 000 m...75 000 m)
Serial Interface RS-232, RS-485
Supply Voltage Electronics: 7...30 V DC, Hood Heater: 23 V DC/AC
Power Consumption below 3 w;Hood Heater: 60 W
Operating Temperature Range -25 °C to +60 ºC (optional extended range -40 to +70°C)
Operating Humidity Range 0...100 % rH
Sealing IP 66
Dimensions W: 640 mm / H: 540 mm / D: 246 mm
Weight approx. 3 kg
Approval certified by Deutscher Wetterdienst (DWD)