LumaTEST Monitor

High Reliability Handheld Signal Conditioner for Gallium Arsenide-Based Fiber Optic Temperature Sensors

LumaTEST Monitor für GaAs-basierende Temperatursensoren View

Key Features

  • Compact and rugged design with rubber boot casing protection
  • High linearity and precision
  • Superior total system accuracy (± 0.8 °C)
  • Internal reference to guaranty reliability
  • Traceable calibration
  • Versatile and easy to use with large LCD display
  • 50 Hz sampling rate
  • ±5 V and RS-232 output interfaces


At the heart of the LumaTEST is the LumaSense Semiconductor Band Gap (SCBG) technology which provides accurate measurements using the temperature-dependent band gap shift of a Gallium Arsenide (GaAs) crystal.

Now fitted with an internal reference, the LumaTEST 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 encountered in a transformer environment such as temperature variations, component aging, mechanical shocks and transformer vibrations.

The LumaTEST is equipped with a large visible LCD display and can be battery operated. It comes with a standard ±5 V output and a RS-232 communication port for real time data acquisition. The LumaTEST can be controlled directly using the front panel keypad or remotely using the standard RS-232 interface.

A rugged casing with a removable rubber boot provides good mechanical protection against intensive handling in tough environments.

The LumaTEST is a compact and portable signal conditioner to be used with any of Opsens’ GaAs Semiconductor Band Gap (SCBG) based fiber optic temperature sensors. With a 50 Hz sampling rate the LumaTEST delivers the performance needed for a wide range of critical measurement applications.

Typical Applications

  • High voltage environments
  • EMI, RFI and microwave environments
  • Hot spot monitoring in Power transformers
  • Microwave and food processing
  • Nuclear and hazardous environments
  • Civil engineering and geotechnical applications


Technical Data


Number of Channels


Compatibility OTG-T, OTG-T+ and OTG-A fiber optic temperature sensors
Accuracy  ± 0.8 °C (Total system accuracy over the full range including both monitor and sensors errors—higher accuracy available on demand)


0.1 °C

Reliability  Internal reference validation
Sampling Rate 50 Hz standard
Consumption 1.8 W Typical
Storage Temperature -40 to +70 °C
Operating Temperature  0 to 45 °C
Humidity 95% non condensing
Light Source Life Span  Life of the Transformer
Physical Characteristics  
Dimensions (Without Rubber Boot Protection) 45 x 105 x 165 mm (1.77 x 4.13 x 6.49 in) See Drawing Below



Enclosure Plastic casing with a removable rubber boot protection
Output Interface ± 5 V and RS-232 standard
Input Power 9 to 24 VDC (AC/DC wall-transformer adapter included)

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