CS225 SDI-12 Temperature Sensor String
Digitale Temperaturmessungen
wetter  wasser  energie  gas flux and turbulence  bauwerke  boden


Der CS225 ist eine Kette von Temperatursensoren eingebaut in einem verstärkten Stahlkabel. Er gibt die Daten im SDI-12 Format aus und kann überall da eingesetzt werden, wo ein Temperaturprofil aufgenommen werden soll. Da der Sensor sehr robust ist, kann er eingegraben, unter Wasser verwendet oder in direkt in Bauwerke eingebracht werden. 

Anewndungsgebiete sind zum Beispiel

  • Temperaturprofile in Bohrlöchern und Messungen am Grund von Bohrlöchern
  • Erfassung von geothermalen Wärmegradienten
  • Temperaturschichten in Seen
  • Bodentemperaturprofile
  • Wassertemperaturprofile
  • Überwachung von Frosthebungen
  • Schichtdickenmessung an Permafrost und Tiefenmessung
  • Wärmeflussmessungen

Jeder CS225 wird individuell nach Kundenvorgeben gefertigt. 

Lesen Sie mehr

Funktionen und Vorteile

  • One SDI-12 channel is used to connect all temperature sensors
  • Low power—suitable for remote applications
  • No calibration required
  • Comprehensive measurement range
  • Makes use of the included SGB3 to protect against electrical surges
  • Extremely rugged and thoroughly tested


Technische Beschreibung

Rigorous Quality Testing of the CS225 Temperature String

We know clients need a really tough temperature string. These strings will be pulled through conduit, buried under concrete, frozen underground, and submersed in water, so quality is of the utmost importance. We put the CS225 through various tests to ensure it can withstand bending, pulling, pressure, freeze/thaw cycles, and temperature cycles. This series of tests confirmed the physical and electrical integrity of the CS225.

When power is supplied to the CS225 probe, the internal electronics will continuously measure the temperature at an approximate rate of 1 measurement per second. Every output measurement obtained from the sensor is a running average of 10 consecutive 1-second readings. The accuracy specification is based on an average of 10 consecutive readings. For this purpose, after initial power-up, it is recommended to delay 10 seconds to obtain the best accuracy.

Because the sensor is obtaining a measurement every 1 second, it is recommended to use the Continuous measurement command to obtain the temperature readings. Using the “R” commands will reduce the time taken to obtain a reading with the SDI-12 protocol.


Operating Temperature Range -55° to +85°C
Typical Accuracy ±0.2°C (-40° to +85°C) includes lifetime drift
Worst Case Accuracy
  • ±0.4°C (-40° to +85°C) includes lifetime drift
  • ±0.5°C (-55° to -40°C) includes lifetime drift
Resolution 0.0078°C
Maximum Pressure 150 psi
Communications SDI-12
Maximum Sensors per Probe 36
Minimum Spacing 15 cm (5.91 in.)
Supply Voltage 9 to 28 Vdc
Current Consumption
  • 1.0 mA (max) quiescent current draw per sensor
  • 20 mA + (# sensors * 1.0 mA) active current draw
Warm-up Time on Power up 10 s
Temperature Point Diameter 2.22 cm (0.875 in.)
Maximum Cable Length 152 m (500 ft)
User-resettable min/max temperature recording Yes
Min/max temperature recording duration Lifetime
Automatic temperature update interval 1 s

Kompatibel mit

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


Product Compatible Note
CR1000 (retired)
CR800 (retired)
CR850 (retired)

Additional Compatibility Information


Our handy CS225 Configuration Tool can help you configure your string, and it assists our staff with customizing your string to your specifications. It includes parameters for lead length, first sensor from ground, and distance between sensors.

CS225 Configurator Tool


Broschüren Produkte

Übereinstimmung mit Richtlinien u. Vorschriften


CS255 Program Examples (4 KB) 26-08-2021

Three example programs that measure the temperature sensors on the CS225 probe. The number of temperature sensors and the SDI-12 control terminal are entered as constants at the beginning of the programs to allow users to easily change them to match their application. The example programs support the CR6 and CR1000X data loggers. Programming for other dataloggers will be similar.

The cs225.CRB program measures 20 sensors with SDI-12 addresses 1 through 9 and A through F. Every 60 s, the aR0! command polls each temperature sensor, then the data is stored in a table. Other common station data is measured every 60 seconds and stored to a daily data table.

The cs225-slow.CRB program measures 20 temperature sensors with SDI-12 addresses 1 through 9 and A through F. The program uses the SlowSequence instruction and the aR0! command to poll each temperature sensor every 60 seconds. The temperature sensor data is stored to a data table on the same interval. Other common station data is measured every 5 seconds and stored to daily and hourly data tables.

The cs225-metdata.CRB program measures 15 sensors with SDI-12 addresses 1 through 9 and A through F. Each temperature sensor is polled on power up and daily with the aR1! command to determine metadata, which is stored in a daily data table. Other common station data is measured every 60 seconds and stored to a separate daily data table.

Artikel und Pressemitteilungen