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Campbell Scientific

October 8, 2020

Operational Specifications

Maximum reported visibility: 75 km (approx. 47 miles)

Minimum reported visibility: 5 metres (16 feet)

Accuracy:

<600 m ±8%

600-10,000 m ±10%

10,000-15,000 m ±15%

15,000-75,000 m ±20%

Resolution: 1 metre

Operating temperature: -25 to +60

°C

Extended operating temperature: -40 to +70

°C option

Operating humidity: 0 . . . 100%

Wind speed: Up to 60 m/s

Sensor sealing: rated to IP66

Mechanical Specifications

Sensor approximate weight: 3 kg (dependent upon

mounting system)

Sensor dimensions (including mount): H540 mm x W640 mm

x D246 mm

Supplied with 5 m long cables as standard. Other lengths are

available

Manufactured from stainless steel and hard-anodised

aluminium powder coated

Mountings: Stainless steel clip on V-bolt mounting to pole

(diameter 32 mm to 52.5 mm)

An optical mounting pole is available to place the sample

volume at 1.5 m as recommended by the WMO

Frangible masts are available to customer requirements to

meet ICAO recommendations (typically placing the sample

volume at 2.5 m)

Shipping weight: 6 kg

Shipping dimensions (mm) 800 x 650 x 240

Electrical Specifications

Electronics supply voltage: 7-30V DC (7-28V DC for CS125

with CS215 attached)

Hood heater supply voltage: 24V DC or AC

Hood heater power: 2 x 30 Watts, total of 60 Watts

Dew heater power: 2 x 0.6 Watt, total of 1.4 Watts

Total unit power: <3W while sampling continuously

(including dew heaters)

Interface Specifications

Serial interface: RS-232 or RS-485

Serial data rates: 1200-115,200 bps (38,400 bps default rate)

Alarm Outputs: 2 x 0-5V outputs, 32 mA (max)

Optical Specifications

Emitter frequency: 850 nm

Lens contamination circuitry monitors both the source

and detector lenses for contamination/blockage at 1 sec

intervals. The sensor can be configured to adjust calibration

for low to moderate window contamination.

Light source stability control ensures stable operation

through variations in temperature and with sensor ageing,

corrected at 1 sec intervals.

We reserve the right to alter specifications without notice

Accessories

Temperature and RH probe type CS215 with RAD10 radiation

shield for CS125

High grade CS120A/CS125 calibration device, wide

temperature range

Power supplies

WMO compliant optical mast

ICAO compliant frangible masts for aviation use

Maintenance cables for serial or USB

Ethernet converters and modems are available

CS125 only

Present and past weather: identifies as standard mist, fog,

drizzle, freezing drizzle, drizzle and snow, rain, freezing rain,

rain and drizzle, rain and snow and snow.

Outputs 56 SYNOP present weather codes according to

WMO code table 4680, associated METAR codes to WMO

code table 4678 and NWS codes.

Accumulation reported range: 0 - 999.9 mm

Accumulation accuracy: ±15%**

Accumulation resolution: 0.1 mm

Intensity reported range*: 0-999.9 mm/hr

Intensity accuracy: ±15%**

Intensity resolution: 0.01 mm/hr

Detection threshold for present weather: 0.02 mm/hr

Reports temperature and RH from optional CS215 T/RH

sensor

Hail detection option available

Optional power supplies with battery back-up available

Connectors in place of flying leads are available to special

order

A low voltage shutdown level can be set to prevent back-up

batteries being damaged

NB: Lower power states can be achieved by less frequent sampling and remote control of heaters.

*The maximum intensity reported is dependent on the mixture of precipitation falling.

*The maximum intensity reported is dependent on the mixture of precipitation falling.

**Against factory calibration standards in the laboratory, for liquid precipitation.

**Against factory calibration standards in the laboratory, for liquid precipitation.