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Addressable Thermistor Strings | Model 3810A

  • Model 3810A (Addressable) Thermistor String.
  • Close-up of an encapsulated sensor from the Model 3810A (Addressable) Thermistor String.
Model 3810A

The Model 3810A Addressable Thermistor String is a variation of the Model 3810 Thermistor String, which uses addressable thermistor sensors installed on a 2-pair cable. This configuration allows up to 248* sensors to be installed on a single, 8 mm diameter cable up to 2000 m in length.

Model 3810A addressable sensor strings can be read using the Model 8900 GeoNet Wireless Data Hosting system or any logger that has a half-duplex RS-485 communication interface and support for Modbus® RTU. In addition, a USB to RS-485 converter and a PC or Field PC can be used for readout purposes.


−20° to +80°C
±0.35°C @ −20° to −10°C
±0.15°C @ −10° to 0°C
±0.07°C @ 0° to +50°C
±0.12°C @ +50° to +65°C
±0.16°C @ +65° to +80°C
Resolution (Non-Linear)
0.002°C (0° to +50°C)
0.005°C (−20° to +80°C)
Supply Voltage
12V ±20%
Sensor Dimensions (L × ø)
146 × 22 mm (sensor)
158 × 22 mm (terminal sensor)

*Please note:. The number of sensors that can be supported depends on the overall length of the cable (contact GEOKON for details).

Please Note: GEOKON maintains an ongoing policy of design review and reserves the right to amend products and specifications without notice. Various instruments are discontinued over time and replaced with new, updated models.

Modbus® is a registered trademark of SCHNEIDER ELECTRIC USA, INC. All other trademarks are the property of their respective owners.