Fiber Optic Temperature Sensors and Solutions for scientists working in laboratories, research centers and universities.

Summary Products


"The rugged and smallest temperature sensors for Semiconductor, Medical and Emobility applications that require fast responsive sensors with high dielectric strength. The sensors have higher accuracy and 100% repeatability over a wider temperature range. The LSENSB sensors are immune to high Electric, Magnetic, Chemical, Radiation, Microwave and Radio Frequency environments. The sensors are free from any isolation requirements (during installation), complex compensation, and on-site calibration."

  • Small diameter for fast response
  • Outstanding repeatability
  • Complete immunity to RFI, EMI, NMR and microwave radiation
  • Plug and Play operation, does not require setup or calibration
  • Minimal thermal shunting


A multiuse fiber optic temperature sensor designed for a wide range of applications, especially for the use in demanding applications. The sensor offers complete immunity to RFI, EMI, NMR and microwave radiation. The standard temperature sensor has a response time of 0.2 s. With a standard deviation of +/-0.2 °C it allows precise and repeatable measurements. The coating of the temperature sensor is made of PTFE, and the fiber tip has  0.3 mm x 0.3 mm area with a Polyimide coating. The fiber optic probe consists of a PTFE protected glass fiber and a GaAs-crystal (Gallium Arsenide) at the sensor tip. It is totally free of metal and is immune to external fields. Therefore, the probes are explicitly suitable for use in large temperature ranges as well as in aggressive operating environments. The sensor length can be from several meters to 1 kilometer in length without impacting the accuracy of the measurement result. Other sensor lengths and connector types are available upon request.


  • Semi-conductor
  • Electronic component
  • Magnetic, RF and microwave environments
  • Catheter design
  • High voltage environments
  • Medical applications
  • Microwave assisted chemistry
  • Sterilization applications
  • RF and Microwave drying applications


  • Sensors do not require any recalibration
  • High Stability, no shift over time
  • Direct and accurate readings
  • Robust fiber optic temperature sensor
  • Available in different cables and sheath options
  • Customizable according to customer specific applications
  • Suitable for OEM-type applications

Technical Specifications

Temperature range-200 °C to +250 °C
Temperature range (Optional Range extensions) Down to 4 °K / Up to +300 °C
Repeatability0.2 °C
Accuracy absolute temperature+/- 0.8 °C
Accuracy relative temperature+/- 0.2 °C
Probe sheathing materialTeflon Coated, except for the sensor tip
ConnectorStainless Alloy / Optional - Dielectric
Response timeAs fast as 35 ms
Probe sensitive area - Diameter0.4 mm x 0.4 mm
LongevityProbe accuracy & repeatability constant over time

Ordering Code

fiber optic sensor Lsensb ordering code


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