OTP-M Fiber Optic High Accuracy Temperature Sensor

High accuracy fiber optic temperature sensor for industrials applications.

Opsens Solutions’ OTP-M is designed to perform in stringent industrials environments by offering the highest temperature accuracy and resolution in the industry.

The OTP-M sensor uses the temperature-dependent birefringence of a crystal as the temperature transduction mechanism. Because of the pure monocrystalline material used, the OTP-M does not shows thermal creeping or aging as with other fiber optic sensors based on the thermal dilatation of glass optical fibers.

Combined with Opsens Solutions’ WLPI signal conditioning technology (patent #7.259.362) and with the inherent advantages of fiber optics, the OTP-M is able to address the industry’s requirements for long term accuracy, repeatability, low drift and high resolution in rapid thermal cycling conditions under the presence of strong EM, RF, MR and microwave fields.

The OTP-M is compatible with the WLPI AccuSens signal conditioners. This compact and precise fiber optic temperature sensor, available in different cables and sheath options, is customizable according to client specification.


  • Highest accuracy and resolution in the industry
  • Outstanding repeatability
  • Miniature and robust design combined with customization flexibility
  • Low drift and low hysteresis
  • EMI/RFI and microwave immune
  • OEM version available


  • RF, microwave ad electro surgery environments
  • Customized
    • Civil engineering and geotechnical applications

    Temperature operating and calibrated range

    0 °C to 85 °C


    ±0.30 °C @ ±3.3 sigma limit (99.9% confidence level)

    Response time

    < 1 s typical (Depends on packaging and measuring conditions)

    Operating humidity range

    0-100 %

    EMI/RFI susceptibility

    Complete immunity


    NIST traceable

    Cable length

    1.5 meters standard (Other lengths available)

    Optical connector

    SC standard

    Signal conditioner compatibility

    WLPI AccuSens signal conditioners

    *The OTP-M product is designed to be integrated into customer host system but is not approved by the FDA or by any applicable regulatory bodies. The compulsory approvals needed for the medical or clinical use of the OTP-M product are the customer’s responsibility.

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

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