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CS125 and CS120A OS

Software applications, data logger operating systems, firmware, and drivers for Campbell Scientific products

CS125 and CS120A OS

v17

Campbell Scientific has introduced a new operating system, OS 17, for the CS120A visibility sensor and CS125 present weather sensor. It is backwards compatible and is easily installed on all CS120A and CS125 sensors (but not older CS120 sensors). OS 17 is available free of charge and can be downloaded here or supplied by email on request.

Upgrade to OS 17 is recommended.

Revision History

v17June 8, 2023
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  • Added FD12 visibility string output (message 2 format), common in many existing hydrological, meteorological or aviation networks, and allows easier replacement or network expansion in such networks.
  • Added new communications support for 7 data bits and even parity (in all message formats).
  • Minor bug fixes.
v15July 29, 2022
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  • Enhancement to the dirty window monitoring system, which further reduces the risk of false saturation events under extreme (bright) conditions.
  • Added support for new hardware, including a change to the main LED light source.
  • (CS125 only) Extensive improvement to the present weather algorithm regarding frozen precipitation has been achieved, capturing the particle size more accurately which also improves the liquid water content estimation.
  • (CS125 only) Added hail to the list of present weather codes the CS125 can now measure and identify without requiring third party hardware.
  • (CS125 only) Added a precipitation calibration feature that allows users to adjust the reported precipitation amounts for rain, snow, hail, snow grains and ice pellets (independent of each other).
  • (CS125 only) Minor fix to correct for external temperature and humidity probe error handling.
  • Minor bug fixes.