OTG-P Fiber Optic Temperature Sensor

GaAs-based fiber optic temperature sensor for demanding applications and rough handling usage.

Opsens Solutions’ OTG-P fiber optic temperature sensor is encapsulated in a rugged stainless steel tube (ceramic tube also available) for maximum protection in the most adverse handling conditions. The OTG-P sensor uses the well proven technique based on the temperature- dependent bandgap of GaAs crystal as the temperature transduction mechanism.

Combined with Opsens Solutions’ SCBG (Semiconductor Bandgap) signal conditioning technology and with the inherent advantages of fiber optics, the OTG-P delivers unprecedented repeatability and reliability in the most adverse conditions. The spectrally encoded light signal is completely immune to EM, RF, MR and microwave fields.

The standard operating range of the OTG- P is from -40 °C to +250 °C (Higher temperature ranges are available upon request).

The P is made with industry standard 62.5/125 microns optical fiber and is compatible with all Opsens Solutions’ SCBG signal conditioners. This robust fiber optic temperature sensor, available in different cables and sheath options, is customizable for customer-specific applications or for OEM applications.


  • Robust design
  • Good accuracy
  • Low drift and low hysteresis
  • EMI/RFI and microwave immune
  • Intrinsically safe
  • -40 °C to +250 °C temperature range


  • EM, RF and microwave environments
  • Sterilization applications
  • Nuclear and hazardous environments
  • Civil engineering and geotechnical applications
Temperature operating and calibrated range

-40 °C to +250 °C (Other ranges available upon request)


± 0.8 °C or better (Total accuracy over the full range including both signal conditioner and sensor errors • higher accuracy available on demand)

Operating humidity range

0-100 %

MRI/EMI/RFI susceptibility

Complete immunity


NIST traceable

Cable length

1.5 meters standard (Other lengths available)

Optical connector

ST standard

Cable sheathing

Operating temperature dependant (Contact factory)

Thermowell material

Stainless steel (Ceramic or other materials available as an option)

Signal conditioner compatibility

All Opsens Solutions’ SCBG signal conditioners with 62.5/125 microns

Opsens Solutions Inc. reserves the right to make any changes to the above specifications without prior notice.

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