CS125 Present Weather and Visibility Sensor
Unrivaled Performance
Ideal for transportation applications
weather applications supported water applications supported energy applications supported gas flux and turbulence applications supported infrastructure applications supported soil applications supported

Overview

The CS125 is an infrared forward-scatter visibility and present weather sensor for stand-alone use or with automatic weather stations including those for road, marine, and airport applications. The CS125 has an attached 5 m (16.4 ft) cable and DB9 connector. 

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Benefits and Features

  • High performance sensor at a competitive price
  • Sensor design minimizes airflow disruption at measurement volume
  • Simple field calibration using optional calibration kit
  • Low power - suitable for remote application
  • Automatic status check for faults or window contamination
  • Incorporates automatic dew and hood heaters for all-weather operation
  • Type certified for aviation use by the German Meteorological Service, Deutscher Wetterdienst (DWD)

Images


Specifications

Operational

Maximum Reported Visibility 75 km (46.6 mi)
Minimum Reported Visibility 5 m (16.4 ft)
Resolution 1 m (3.28 ft)
Outputs 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. 56 SYNOP present weather codes and associated METAR and NWS present weather codes - hail detection option; past weather code option.
Accuracy
  • ±8% (up to 600 m [1968.5 ft])
  • ±10% (600 to 10,000 m [1968.5 to 32,808.4 ft])
  • ±15% (10,000 to 15,000 m [32,808.4 to 49,212.6 ft])
  • ±20% (above 15,000 m [49,212.6 ft])
Precipitation Detection Sensitivity 0.05 mm/h
Accumulation Reporting Range 0 to 999.9 mm (0 to 39.37 in.)
Accumulation Accuracy 20%
Accumulation Resolution 0.1 mm (0.0039 in.)
Rain Intensity Range 0 to 999.9 mm/h (0 to 39.37 in./h)
(The maximum intensity reported is dependent on the mixture of precipitation falling.)
Intensity Accuracy 20%
Intensity Resolution 0.1 mm/h (0.0039 in./h)
Operating Temperature Range -25° to +60°C (standard)
Extended Operating Temperature Range -40° to +70°C (This extended version is available as a special. Contact Campbell Scientific for more information.)
Operating Humidity 0 . . . 100%
Operating Wind Speed Up to 60 m/s
Sensor Sealing Rated to IP66
Total Unit Power Less than 3 W while sampling continuously (including dew heaters)

Mechanical

Material Stainless steel and hard-anodized aluminum powder-coated
Mountings Stainless-steel clip on V-bolt mounting to pole with diameter of 32 to 52.5 mm (1.26 to 2.07 in.)
Mounting Pole An optical mounting pole is available to place the sample volume at 1.5 m (4.9 ft), as recommended by the WMO.
Frangible Mast Frangible masts are available to customer requirements to meet ICAO recommendations (typically placing the sample volume at 2.5 m [8.2 ft]).
Visibility Sensor Dimensions 540 x 640 x 246 mm (21.26 x 25.2 x 9.7 in.) including mount
Cable Length 5 m (16.4 ft)
Sensor Weight ~3 kg (6.61 lb) dependent upon mounting system

Electrical

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

Optional power supplies with battery backup available.

Connectors in place of flying leads are available.

A low-voltage shutdown level can be set to prevent backup batteries from being damaged.
Electronics Supply Voltage 7 to 30 Vdc
Hood Heater Supply Voltage 24 V (dc or ac)
Hood Heater Power 2 x 30 W (total of 60 W)
Dew Heater Power 2 x 0.6 W (total of 1.2 W)

Interface

Serial Interface RS-232 or RS-485
Serial Data Rates 1200 to 115,200 bps (38,400 bps default rate)
Alarm Outputs 2 x 0 to 5 V outputs, 32 mA (max)

Optical

-NOTE- Lens contamination circuity monitors both the source and detector lenses for contamination/blockage at 1 s 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 aging.

Corrected at 1 s intervals.
Emitter Light Frequency 850 nm

Compatibility

Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.

Data Loggers

Compatible Note
21X (retired)
CR10 (retired)
CR1000 (retired)
CR1000X
CR10X (retired)
CR200X (retired)
CR206X (retired)
CR23X (retired)
CR295X (retired)
CR300
CR3000
CR3000
CR310
CR500 (retired)
CR5000 (retired)
CR510 (retired)
CR800
CR850
CR9000 (retired)
CR9000X (retired)

Downloads

CR1000X CS125 example programs v.1 (10 KB) 18-03-2020

CR1000X programs that read continuous data and polled data and use the SET, SETNC, and GET commands. The program that uses the SETNC command powers the CS125 hood heaters when needed according to the dew point. A HydroVUE5 Air Temperature and Relative Humidity Sensor provides the measurements used in the dew point calculation.


CS120A & CS125 Firmware v.8 (553 KB) 15-06-2016

Includes the current CS120A and CS125 firmware.

Note: This is not applicable for the original CS120 sensor.

View Revision History

Campbell Viewpoint v.2.1.0.2 (86 MB) 09-10-2019

Campbell Viewpoint is viewing software designed to accompany the Campbell Scientific optical sensor range, including the CS135 ceilometer, SkyVUE PRO, SkyVUE 8, SkyVUE 8M, CS120A visibility and CS125 present weather sensors. It is free to download (or via email on request) and use for 100 hours, after which you will need to purchase a key to continue using it.

Version 2.1.0.2

Viewpoint version 2.1.0.2 has introduced our new ceilometer sensors to the list of instruments that can be monitored.  This includes the SkyVue PRO, SkyVUE 8 and SkyVUE 8M.  

Previous sensors are still available.

Version 2.1.0.2 also includes some minor bug fixes and improvements to the help menu.

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