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FBG accelerometer (acceleration sensor)

Sensor for measuring structural vibrations

The FBG accelerometer is a single axis FBG acceleration sensor designed for high accuracy and resolution measurements of small structural vibrations. It is a fiber optic version of the conventional accelerometer that combines compact size with long term reliability, high sensitivity, and linearity. Therefore, the accelerometer is perfectly suitable for a large range of applications, where low frequency and small amplitude accelerations are present.

  • 100% passive sensor without the need for power 
  • structure tension and compression monitoring at the same time
  • fast, simple, repeatable installation

100% passive sensor

Since the sensor does not need power, it easily monitors places without electricity and hazardous or inaccessible areas.

Simple installation

Each sensor itself is inside a metal tube and can be installed very easily. No advance skills are required.

Remote sensing

The FBG accelerometer is very suitable for remote sensing, as it can be installed even several kilometers away from the measurement unit.

Large range of applications

The sensor is ideal for the measurement of structural responses to dynamic stimuli, for example, buildings during earthquakes, wind turbines under gust loading, ship hulls under wave loading, etc. 

Avoiding dynamic effects

It helps you to avoid negative dynamic effects such as resonance, fatigue, and instability that can endanger structural integrity and human health. 

Low transverse sensitivity

This vibration sensor is designed to measure vibration in one principal axis, so it won’t provide any output caused by motion, which is not in the same axis that the sensor is designed to measure.

Flat frequency response

The FBG accelerometer has a very flat frequency response so its output is not distorted when responding to changes in acceleration.

Protected as IP68 rated devices

The IP68 rating guarantees complete dust tightness and protection against the effects of long immersion in water.

Immune to EMI/RFI

The sensor operates in harsh environments and hazardous areas. The technology is passive, explosion safe, and immune to electromagnetic/radio frequency interference.

Intrinsic multiplexing capability

Thanks to the intrinsic multiplexing capability, many accelerometers can be linked by a single optical fiber.  This makes them suitable for inaccessible locations and large scale sensing networks.

Insensitivity to environmental induced noise

The sensor is inherently insensitive to environmental noise and is therefore suitable for measurements that could be distorted by ambient sound.

Robust aluminum case design

The aluminum case and input/output fiber optic armored cables make the accelerometer suitable for outdoor installations under severe conditions and without extra protection.

Low installation costs

Installation and cabling for such sensor networks are much less expensive and less cumbersome than comparable electronic gauge networks.


The sensor can be used alone or incorporated into a large sensing networks.

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