TEMP120 20-Channel Thermocouple Module
Better Temperature Measurements
With dedicated reference temperatures
weather applications water applications energy applications gas flux and turbulence applications infrastructure applications soil applications


The TEMP 120 is a purpose-built thermocouple measurement module. It has 20 thermocouple inputs using universal-alloy miniature thermocouple jacks. The TEMP 120 is made to handle extreme temperature environments and rapid thermal gradients applied to the measurement module. It has a dedicated temperature reference for every input terminal and is carefully designed to reduce temperature errors in the presence of external temperature gradients.

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Benefits and Features

  • Universal-type standard miniature thermocouple connectors
  • Cold-junction reference temperatures on every channel
  • Exceptional accuracy and temperature stability
  • CPI DAQ connection for channel expansion
  • CANbus 2.0 A/B output available
  • USB 2.0 interface for PC-based operation


3D/CAD Files:

Detailed Description

The inputs of the TEMP 120 are a universal copper-copper junction and can accept any standard thermocouple alloy type. The TEMP 120 is part of a data-acquisition system that includes a DAQ such as a GRANITE 6, 9, or 10, or the CR6 or CR1000X Dataloggers. The clock timing synchronization across modules is managed by the DAQ or data logger via the CPI communication port. The time base can be referenced either to GPS or a temperature-compensated real-time clock. Applications requiring hundreds of terminals of thermocouples can be easily assembled as a single data-acquisition system. Measurement modules can be collocated or spread out via a networking cable to be closer to the point of measurement.


Terminals 20 channels: universal (copper/copper), miniature socket connectors
Supported Thermocouple Types B, E, J, K, N, R, S, T
  • ±1°C in a static temperature environment (-40° to +70°C for standard units; -55° to +85°C for XD units)
  • ±3°C during rapid temperature ramps (-40° to +80°C in 15 minutes)
Resolution 0.015°C
  • 10 Hz when filtering is disabled (maximum measurement rate for all 20 channels)
  • 1 Hz when filtering is enabled (maximum measurement rate for all 20 channels)
Input Limits 0.25 to 3.0 Vdc (built-in 1.65 Vdc bias voltage)
Maximum Input Voltage ±10 Vdc
DC Common-Mode Rejection ≥ 115 dB
Normal Mode Rejection > 80 dB (at 50 and 60 Hz)
Dimensions 21.5 x 10.8 x 5.1 cm (8.5 x 4.25 x 2 in.)
Weight 0.9 kg (1.95 lb)


CPI RJ45 interface to Campbell Scientific data loggers and CDM measurement peripherals and sensors
USB USB micro-B device only, 2.0 full-speed 12 Mbps, for computer connection


Processor Renesas RX63N (32-bit with hardware FPU, running at 96 MHz)
Memory 2 MB SRAM
A/D Converter 24-bit sigma-delta

Power Requirements

Voltage 9.6 to 32 Vdc
Typical Current Drain
  • 5 mA (sleep)
  • 30 mA (active)


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


Product Compatible Note
CR1000X Requires OS version 4 or greater.
CR6 Requires OS version 10 or greater.


Product Compatible Note
GRANITE 10 Requires OS version 1 or greater.
GRANITE6 Requires OS version 1 or greater.
GRANITE 9 Requires OS version 1 or greater.

Additional Compatibility Information

The TEMP 120 is compatible with CPI-enabled data loggers only.

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