TempVue 20  Pt100 Digital Air Temperature Sensor
Meets World Meteorological Organization Recommendations
Digital ambient air-temperature sensor
weather applications supported water applications supported energy applications supported gas flux and turbulence applications supported infrastructure applications supported soil applications supported


The TempVue™20 provides even greater flexibility to customers wanting the next generation of air-temperature measurements. This sensor meets all relevant World Meteorological Organization (WMO) temperature recommendations, but with a digital output that ensures maximum flexibility to meet all application needs.

Designed with the customer in mind, the TempVue 20 easily interfaces with Campbell Scientific or third-party data loggers and fits a wide range of aspirated and passive temperature shields. The sensor comes with a short cable attached and terminates into an M12 connector, providing exceptional convenience, environmental protection, and data integrity for use in a variety of applications.

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Benefits and Features

  • Status information, measurement averaging options, and calibration information onboard
  • Meets all relevant temperature WMO recommendations
  • High measurement stability over both time and temperature
  • Incredibly easy to install or remove for calibration checks
  • Durable and protected for even the harshest environmental conditions
  • Calibration certificate included


The TempVue 20
The TempVue 20
The TempVue 20
The TempVue 20 using an adapter
The TempVue 20 with the optional extension cable attached
The TempVue 20
Example of the TempVue 20 secured inside a solar radiation shield and mounted to a pole using a bracket (items sold separately)

Technical Description

The TempVue 20 consists of a wire-wrapped, four-wire Pt100 Resistance Temperature Detector (RTD) element encapsulated in an epoxy-filled, stainless-steel housing. The thin yet robust housing, combined with the Pt100 sensing element, provide a truly WMO-compliant sensor to meet the 20-second step response time with an ambient wind speed of only 1 m/s (3.3 ft/s). The digital TempVue 20 also gives users much more measurement confidence than an analog sensor is able to provide, such as status information and the removal of any hassles regarding calibration inputs.

The TempVue 20 has a maximum measurement uncertainty of only 0.3 Kelvin over the entire measurement range of -60° to +60°C, with only 0.1 Kelvin over the most common temperature range of -40° to +40°C.


Sensor Description Platinum Resistance Thermometer (Pt100)
Measurement Uncertainty
  • ±0.1 Kelvin over -40° to +40°C (-40° to +104°F) range
  • ±0.3 Kelvin over -60° to +60°C (-76° to +140°F) range
Temperature Measurement Range -60° to +60°C (-76° to +140°F)
Time Constant in Air 20 s for a wind speed of 1 m/s (3.3 ft/s)
Resolution Two decimal places (0.01°C)
Connector Type M12 (to extend beyond 1 m [3 ft] standard cable length)
Probe Diameter 1.9 cm (0.75 in.) maximum
Probe Length 12.1 cm (4.75 in.) tip to end of cable gland
Extended Probe Length 18.1 cm (7.125 in.) tip to end of extender piece
Total Length 97.16 cm (38.25 in.) tip to end of connector
Weight 70 g (0.15 lb) for probe with extender piece, including standard 1 m (3 ft) cable with M12 connector


Voltage Range 6 to 16 Vdc
Current 150 µA

TempVue 20-SDI-12

SDI-12 Compatibility Version 1.4


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


Product Compatible Note
CR800 (retired)
CR850 (retired)

Mounting Equipment

Product Compatible Note


TempVue 20 Program Example v.1 (1KB) 19-10-2023

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.

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