User Guide

The NexSens TS210 Thermistor String provides high precision temperature measurements for profiling in lakes, streams, and coastal waters. It features an integral titanium thermistor secured and epoxied in a protective housing for underwater deployments.

NexSens TS210 Thermistor String



Sensor Information

  • Power Requirement: 5-24VDC
  • Protocol: Modbus-RTU
  • Baud Rate: 19200
  • Parity: N81
  • Default Address: 1*
  • Universal Address: 251
  • Format: Big Endian
  • Timeout: 500ms

*On a string with multiple nodes, the nodes will be addressed in increasing numerical order.


Modbus-RTU Register Information

Function 0x04 (Read input registers)
RegistersData TypeData SizePurpose
0x0006,0x0007Float2 registersRequests the temperature recorded by a T-node FR sensor in Celsius

Ex. 01, 04, 00, 06, 00, 02, 91, CA

  • Requests the temperature reading of a TS210 node with Modbus address 1, reported in Celsius.


UW-FLxR Cable Connection

The NexSens UW-Receptacle to Flying Lead cable is an accessory that may be purchased separately for integration of a TS210 string with a third-party data logger or SCADA system. NexSens X2-series data loggers have built-in UW-receptacle ports to accommodate a direct connection of the string.

UW-FLxR Wiring Table

Receptacle PinWire ColorT-Node FR Signal



Pre-Deployment Check/Setup

It is recommended that field deployments be carefully planned, and it is best to completely configure the system on a lab bench and test it for a period of time prior to taking it to the field. This will ensure a successful deployment and quality data collection. Additionally, it is much easier to troubleshoot problems in the lab than in the field.

TS-Clamp mooring line connection

The TS-Clamp accessory can be used to affix a TS210 thermistor string to a mooring line for deployment.

Cable Armoring

For any TS210 deployment, apply cable armor to all portions of the sensor string that have the potential to wear against irregular surfaces.


There is very little maintenance required for TS210 temperature strings because they are designed for long-term deployments in submersible applications.

  • Cleaning
    • Any bio-fouling that accumulates on TS210 temperature strings during deployments should be cleaned using a soft cloth or soft-bristled brush along with soap and water.
  • Calibration
    • TS210 thermistors are capable of holding their factory calibration indefinitely and do not require re-calibration.
  • Storage
    • TS210 thermistor strings should be stored in a cool, dry place.