Tilt sensors

General information

Deflection or bending of (super) structures can provide invaluable information related to its structural integrity. A bridge for example experiences the dynamic loads of passing trucks and lorries which will cumulate stress and strain over time. As a result the bridge will slowly deform (e.g. compaction, deflection and/or bending). These changes of the bridge shape and structure are so slow and subtle that they often remain unnoticed by maintenance engineers. However, such long term deformation is anything but harmless! If undetected a collapse is just a matter of when.

Most of Europe´s bridges are built in the 1960´s and 1970´s. In those days the use of reinforced concrete was very common. In current time, i.e. 50 to 60 years later, these bridges are deteriorating at a rapid rate and the majority of bridges in use are considered deficient by today´s design standards. A widespread failure in bridges across Europe is imminent. The collapse of the Morandi bridge in Genoa (Italy) at an age of 51 years, is expected to be merely the first major incident. The Morandi bridge has highlighted the importance of preventive monitoring systems, which are able to identify structural problems at an early stage and by doing so guaranteeing the public safety.

Somni strongly believes that sensors based on fiber optics can make the difference. Fiber optic sensing technology, as used by Somni, is free from corrosion, has long-term stability, and allows continuous monitoring. Furthermore, it is free from electromagnetic interferences, avoiding undesirable noise, while having a very low signal transmission loss that allows very remote monitoring. The number of potential failure modes inside the sensor is reduced to a bare minimum owing to the long term sensor reliability. Incorporating extra redundancy in the sensor system ensures very low failure rates or loss of monitoring data.


TI 500 T

The TI 500 T sensor of Somni Solutions is used for monitoring small changes in deflection angles (tilt) with high accuracy and unprecedented stability. This sensor is particularly suitable for monitoring of large structures and objects such as bridges. The TI 500 T tilt sensor is unique in its kind with a high sensitivity per unit angle deflection and a total measuring range of 10 degrees. The intrinsic temperature compensation mechanism allows to resolve very small angle changes of 0.002 degrees.

All sensors are packaged in a rugged stainless steel housing offering maximum protection against harsh environments.

  • >550pm/deg sensitivity

  • +/-5 deg range

  • excellent long term stability

  • temperature & drift compensated

  • 1 and 2 axis

  • various mounting brackets available

Additional information

Demonstration of our tilt sensors


Let's Work Together

Rik Knoppers


Eric Meijer


Remco Nieuwland