OTG-MPK5 Fiber Optic Temperature Sensor

High accuracy SCBG-based fiber optic temperature sensor for tip measurement applications.

Opsens Solutions’ OTG-MPK5 fiber optic temperature sensor offers the highest performances and robust packaging in the industry. The OTG-MPK5 sensor uses the well proven technique based on the temperature-dependent bandgap of GaAs crystal as the temperature transduction mechanism. Its small sensing GaAs crystal located at the tip of the optical fiber makes it convenient for tip measurement applications. The OTG-MPK5 temperature sensor is housed in a robust PEEK tube hence facilitates insertion and daily handling.

Combined with Opsens Solutions’ SCBG (Semiconductor Bandgap) signal conditioning technology and with the inherent advantages of fiber optic, the OTG-MPK5 delivers unprecedented repeatability and reliability in the most adverse conditions such as high level of EM, RF, MR and microwave field environments.

The OTG-MPK5 is made with industry standard optical fiber and is compatible with all Opsens Solutions’ SCBG signal conditioners. This robust fiber optic temperature sensor is available with different optical cables and sheath options and is customizable according to customer specific applications or for OEM-type applications.


  • ± 0,3 °C total system accuracy
  • Small and robust design
  • Outstanding repeatability
  • EMI/RFI and microwave immune
  • Intrinsically safe
  • OEM-type and custom disposable version


  • Surface and core temperature monitoring in EMI environments
  • RF and ultrasound environments
  • Temperature monitoring for preclinical and research applications
  • MR coil temperature monitoring
Temperature operating range

+20 °C to +45 °C (Higher temperature ranges available upon request)


0.01 °C


± 0.3 °C (Total accuracy over the full range from +20 to 45 °C including both signal conditioner and sensor errors)
± 0.8 °C and better (Total accuracy for higher temperature range including both signal conditioner and sensor errors)

Response time

≤ 225 ms

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

Sensor diameter

0.50 mm O.D.

Cable sheathing

Teflon™ ( ≥ 85 °C)

Signal conditioner compatibility

All Opsens Solutions’ SCBG signal conditioners

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

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