TempMonitor multi-channel signal conditioner

High reliability multi-channel signal conditioner.

At the heart of the TempMonitor is the Opsens’ Semiconductor Band Gap (SCBG) technology which provides accurate measurements using the temperature dependent bandgap shift of a GaAs crystal.

The TMM is now fitted with an internal reference that allows regular self verification and correction of its fully traceable calibration. The internal reference guarantees long term Total System Accuracy of ± 0.8°C in the most adverse conditions.

The TMM is equipped with an LCD display. SCPI and MODBUS over RS-232 or RS-485 interface are all available communication options. SPDT-type relays and analog outputs are optionally available. PLC controller is also available to offer extended control capabilities through a wide range of input/outputs.

With a ± 0.3 °C accuracy or better (total accuracy including both signal conditioner and sensor errors from 20°C to 45°C) and 0.01 °C resolution, the TMM delivers the performances needed for a wide range of critical measurement applications.


  • Up to 12 measurement channels
  • Total system accuracy (± 0.8 °C)
  • Internal reference to guaranty reliability
  • No drift, no calibration required
  • SCPI, MODBUS protocols
  • RS-232 and RS-485
  • SoftSens easy programming and operation
  • Local and remote data acquisition
  • Relays and analog output options available
  • Large LCD display with user definable description for each optical channel


  • General laboratory applications
  • Temperature monitoring in MR environment
  • RF, ultrasound and electro surgery environments
  • High voltage environments
  • EMI, RFI and microwave environments
  • Microwave and food processing
  • Nuclear and hazardous environments
  • Civil engineering and geotechnical applications
Number of channels

Up to 12


All Opsens GaAs fiber optic sensors with 62.5/125 microns optical fiber


± 0.3 °C or better (Total accuracy over the full range from 20°C to 45°C including both signal conditioner and sensor errors)

± 0.8 °C or better (Total accuracy over the full range -20°C to 250°C including both signal conditioner and sensor errors)


0.01 °C


Internal reference

Sampling rate

50 Hz standard (rate given for a fixed channel)

700 ms channel to channel switch time


LCD screen display standard


SCPI and MODBUS standard

Serial Output

RS-232 and RS-485 standard

Analog output

4-20 mA output, 0-1 mA, ± 5 V


6 C-Form SPDT relays, 5 A @ 250 VAC or 30 VDC, 6 relay status indicators I/O and control option PLC controller unit with various I/O optionally available

Input power

12 to 24 VDC


2.5 W typical

T° data storage

> 1,000,000 temperature measurement points

Operating temperature

10 °C to 45 °C


95 % non condensing

All specifications are subject to change without prior notifications

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