Displacement sensor

Displacement sensor

The fiber optic Displacement Sensor is a short range displacement gauge which measures the mutual position between two fixed points. It is based on Fiber Bragg Grating (FBG) technology. The standard gauge range is 0 to 50 mm and can be modified upon request. The sensor has connectors on both ends and can be used alone or in series as a part of a various FBG sensor array. Installation and cabling for such arrays is much less expensive and less cumbersome than comparable electronic gauge networks.

The Displacement Sensor is the fiber optic equivalent of a potentiometric, inductive or capacitive displacement gauges and can be mounted directly on the surface of a monitored structure.

The Displacement Sensor features high accuracy and resolution, and immunity to electric sparks and EMI/RFI. It is suitable for remote sensing and it is possible to install it kilometers away from the measurement unit. It is protected against water guaranteeing the IP67 protection degree.


  • Immune to all electromagnetic effects and safe operation in harsh environments
  • Sensors can be placed in series and hereby reducing the cabling to a minimum
  • High resolution displacement monitoring
  • Fast response
  • Multiple km signal integrity
  • Direct attachment of the sensors to the part(s) to be monitored
  • Fast, simple and  repeatable installation
  • Zero power
  • Long-term reliability
  • Intrinsically safe design


The fiber optic Displacement Sensor can be used for the measurement of position changes of fixed points on structures (due to tension, compression and bending). This allows for the continuous structural health monitoring of structures, displacement or undesired deformation in (concrete) walls, bridges, buildings, ships, etc. The sensor can also be used for monitoring of illegal access or vandalism at various facilities. Electrical power is not necessary on-site, an interrogator can be placed tens of kilometers away.

  • Civil engineering structures
  • Large concrete and metallic components
  • Nuclear power plants and experiments
  • Chemical and Petrochemical Industry
  • Oil and Gas Industry
  • Laboratories & Universities
  • Security
  • Dams


Sensor dimensions 185 x 65 x 35 mm (without position lever)
Displacement range 0 to 50 mm
Displacement resolution 0.05 mm
Operating temperature -20 °C up to +60 °C
Central wavelength 1510 to 1590 nm
Connector type FC/APC (standard)
Pigtail length 1.0 m (standard)
Housing material Painted aluminum, stainless steel
Protection class IP67

Displacement Sensor

Displacement sensor

Displacement sensor

Displacement sensor



2019 6. 6.

Exhibition SENSOR + TEST 2019

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