TempVue 50 SDI-12 Digital Water Temperature Sensor
Rugged and Reliable
For years of scientific-grade water and soil temperature measurements
weather applications water applications energy applications gas flux and turbulence applications infrastructure applications soil applications


The TempVue™50 is a high-precision digital water and soil temperature sensor that extends the high performance of the TempVue product line into the water. The TempVue 50 is a rugged and reliable sensor that exceeds United States Geological Survey (USGS) Office of Surface Water (OSW) specifications. The sensor is also plug-and-play with the Aspen ecosystem of Internet of Things (IoT) edge devices.

Read More

Benefits and Features

  • Submersible and watertight sensor and cable
  • Highly accurate silicon sensor providing reliable and stable measurements in all conditions
  • Strong anchor loop to pull through conduit or secure to weights
  • Calibration certificate provided
  • Simplified installation and programming with SDI-12 outputs
  • Calibration information stored within the sensor and automatically applied to raw values to eliminate the need for coefficient calculations
  • Intelligent, digital sensor offering less complex wiring and fewer data logger channels
  • Compatible with all SDI-12 data loggers


Detailed Description

The TempVue 50 is a fully digital water temperature sensor that uses the latest silicon bandgap technology to provide the market's highest level of accuracy and repeatability. The all-digital design minimizes self-heating, reduces complexity, and can be used to measure scientific-grade temperatures in both water and soil. The measurement electronics are surge protected and environmentally sealed with a fully encapsulated Delrin™ housing to provide years of reliable measurements in all environments.


Sensor Description Digital silicon bandgap
Time Constant in Air 35 s (1 tau)
Measurement Interval > 15 s (recommended)
Temperature Range -40° to +60°C
Measurement Uncertainty 0.1°C (-10° to +60°C)
Temperature Resolution 0.01°C
Housing Material Acetal homopolymer (Delrin 500P)
Maximum Submergence 30 m (98.4 ft) depth
Recommended Recalibration Interval 1 y
Diameter 17 mm (0.67 in.)
Length 95 mm (3.74 in.)


Average Current 150 µA
Active Current < 3mA
Input Voltage 6 to 16 V


SDI-12 Version 1.4
SDI-12 Address 0 (default)


-NOTE- This device is capable of fitting through a standard 2.5 cm (1 in.) conduit with a 20.3 cm (8 in.) factory bend.
Jacket Material Watertight, UV-resistant, 1.1 mm (0.045 in.) polyurethane
Maximum Cable Length 150 m (492.1 ft)
Maximum Pull Strength (Load) 450 N (100 lb)
Maximum Weight Load 2.25 kg (4.96 lb)


Note: The following shows notable compatibility information. It is not a comprehensive list of all compatible or incompatible products.

Data Loggers

Product Compatible Note
Aspen 10

Additional Compatibility Information

The TempVue 50 is compatible with all current Campbell Scientific data loggers, Aspen IoT devices, and other SDI-12-compliant data loggers.


TempVue 50 Program Example v.1 (1 KB) 01-22-2024

This program uses the R0! SDI-12 instruction to retrieve the temperature measurement. The program is written for a CR1000X, but programs for other data loggers will be similar.

Privacy Policy Update

We've updated our privacy policy.  Learn More

Cookie Consent

Update your cookie preferences.  Update Cookie Preferences