Soil Temperature Profile Strings - CS225 & CS231

Campbell Scientific

The CS225 and CS231 are custom temperature sensors strings with output from a single SDI-12 signal.

The CS225-L is a string of temperature sensors mounted in reinforced steel cable, which can be used in any environment where temperature profiling is required. It uses reliable SDI-12 digital technology for easy system integration.

The CS231-L consists of a rigid probe assembly and up to four optional external temperature probes. The rigid probe assembly maintains the precise position of the temperature points within the profile, while protecting the temperature sensors in all mediums for the long-term. The CS231-L is suited for a wide variety of applications and environments, such as in roadbeds, soils, and water (snow and ice).

Each CS225-L or CS231-L is custom manufactured to the client's requirements.



  • Customizable measurement spacing for any number of applications
  • One SDI-12 channel used to connect all temperature sensors
  • Low power - suitable for remote applications
  • No calibration required
  • Serial number and installation depth data for each location stored on-board each sensor
  • Excellent long-term stability of measurements
  • Wide temperature measurement range
  • Operating range: -55° to +85°C
  • Accuracy (includes lifetime drift) Typical: ±0.2°C (-40° to +85°C)
  • Resolution: 0.0078°C



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CS225 Specifications

File Size 1.38MB   Filename b_cs225.pdf   Download

CS231 Specifications

File Size 242KB   Filename b_cs231-l.pdf   Download