LumaTEST Monitor

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

LumaTEST Monitor 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 bandgap 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)

Find Your Local Representative

To find a service for your product or to buy a new one.

Turn-key Service and Support

Find out all field services options and asset assurance.