The systems for thickness measurement TMS from ELOVIS work on the basis of non-contact edge detection in reflection. The measurement can be carried out during the movement of the material to be measured or when the object to be measured is stationary. Measurement objects are e.g. strand goods, web and strip goods, plates and piece goods. The high-precision measurement is used for production monitoring as well as process optimisation and documentation of the delivery condition of the produced goods. TMS systems are maintenance-free, permanently calibrated and measure largely independent of the material. TMS systems are used, for example, to measure the thickness of strips, profiles, pipes, plates, beams, bolts, rolls made of a wide variety of materials.