The most common application of rod designs is in hydraulic actuators. The placement inside the pressurized portion of the hydraulic cylinder requires the same pressure resistance from the position sensors as from the hydraulic cylinder itself. In practice, these pressures reach up to 1000 bar. The electronics are placed in a housing made from aluminum or stainless steel, the waveguide in a pressure-resistant pipe out of non-magnetic stainless steel which is closed by a plug welded on its front side and a flange on the opposite side which seals the high pressure section with an O-ring seal. A position sensor ring with inlayed magnets glides above the pipe or rod to mark the position which is to be measured.
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