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Electromagnetic sensors exploit the magnetostrictive effect of certain ferromagnetic materials. In a ferromagnetic material, magnetostriction results in anisotropic deformation when subjected to a magnetic field.
Corrosion sensor in reinforced concrete.
In-situ measurement of the humidity gradient inside the concrete.
Platinum thermometer resistant to radiation.
It is therefore possible to measure different physical quantities by measuring the variation of the magnetic permeability. These sensors can sometimes be an alternative to conventional sensors.
Concrete water content sensor by TDR: HydraPter
- Water content measurement in fresh and hard concrete
- Can follow the evolution of the water content with time