SmartBars are robust FBG sensors packaged to withstand embedment within concrete, bitumen and other construction materials. Smart Fibres have developed and deployed several designs of SmartBar to suit particular applications such as road pavement monitoring and concrete pillar compression. Our SmartBar embedded rebar sensors are being used to monitor supporting pillars in high rise residential buildings during construction and throughout their lifetime.

SmarBar sensors are available in a variety of gauge lengths, with or without temperature compensation, and can be connected in multiple sensor strings.

  • Long gauge FBG strain sensor
  • Zero power, EMI immune, intrinsically safe
  • Multiple km signal integrity
  • Suitable for embedment in inhomogeneous construction materials
  • Highly stable
  • Temperature compensation option
  • High multiplexing capability

Related FAQs

FAQ. What is the warranty period for Smart Fibres equipment?

All of our fibre optic sensors come with a standard one year warranty. This warranty can be increased on a year by year basis. Extended warranty is available at the time of initial purchase on request.

FAQ. How do I calculate which wavelength to use for my FBGs to maximise the number of sensors on a particular channel?

Smart Fibres has created a wavelength budget calculation tool for FBG wavelength selection.

Please Email Us or call +44 1344 484111 with details of your application and we can help you create a wavelength budget.

FAQ. How do I compensate for the thermal effect on the strain measuring FBG?

We recommend that a second FBG, which is completely isolated from strain, is fitted close to the strain measuring FBG. Temperature compensation can be achieved in 2 methods, loose FBG or a strain isolated coupon with a known CTE. Our SmartSoft software includes a utility to automate this temperature compensation process.

FAQ. What fibre type is used in your systems?

Single mode fibre with a 9 µm core, 125 µm cladding, and a 155 µm Polyimide or 245 µm Acrylate coating. Optical Fibers with pure silica core, bend tolerant and small core e.g. 6/125 or 4/125, can also be used but with some optical power losses. Multi mode fibre cannot be used.

FAQ. Can we put different sensor types on the same fibre?

Yes, Smart Fibres’ WDM products allow the user to combine different sensors types, e.g. temperature, strain and vibration all on a single fibre.