Tilt Meter - Inclination sensor

Inclination sensor

The FBGTi-01 Tilt Meter is an inclination sensor based on Fiber Bragg Gratings (FBGs). The Tilt Meter is designed to measure small variations of angle towards the vertical without the need for temperature compensation. This sensor is completely passive, offering inherent insensitivity to environmental induced noise.

The FBGTi-01 Tilt Meter features good linearity, no hysteresis and effective temperature compensation by using two FBGs in an innovative push-pull configuration. The sensor’s total fiber optic design ensures intrinsic immunity to electric sparks and EMI/RFI. The Tilt Meter combines compact size, high resistance to corrosion and harsh environments with long-term reliability. It is protected against rain and moisture as IP68 glands are used in the buffer/sensor connections. It’s also suitable for remote sensing being possible to locate it several kilometers away from the measurement unit. It offers intrinsic multiplexing capability that allows the concatenation of a large number of sensors in a single optical fiber. This sensor is therefore particularly suitable for difficult-to-reach locations and scale sensing networks.


  • Robustness
  • Completely passive
  • High multiplexing capability
  • Remote sensing
  • Self-referenced
  • Temperature compensated


The fiber optic Tiilt Meters FBGTi-01 can be used in a large range of monitoring applications, such as in slopes and bridge pillars.


Sensitivity 500 pm/deg
Measurement range 10 deg (±5 deg)
Resolution 0.002 deg
Maximum calibration error 0.05 deg
Operation temperature -20 to 80 °C
Materials Stainless steel
Dimensions 220 x 140 x 42.5 mm
Weight 3.3 kg

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