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The torsion ring load cell is based on the principle of conical deformation that occurs when a cylinder is subjected to a torsional (twisting) load at its mid section.
The deformation causes an expansion of the cylinder diameter at one end, and a corresponding contraction at the other end. Therefore, if spiral strain gauges are placed on the end surfaces of the cylinder, these strains can be measured and are exactly proprtional to load.
Application
The torsion ring load cell often takes the form of a low profile high stiffness design, and is usually made from stainless steel with welded diaphragms to make it suitable for outdoor applications or washdown applications (eg in the food industry).
Multiple load cell outputs are wired in parallel and their outputs are then summed to give the total load result. In the case of floor scales and other applications where the load can be positioned off-center, then it may be necessary to trim the outputs of the individual load cells so that the load result is the same, regardless of load position on the scale. Such devices are known as summing junction boxes or trimming boxes, and can be found in the OTHER PRODUCTS selection on the Mantracourt website.
The output of such load cells is usually in the region of 2 mV/V at full load, which makes them suitable for use with any of Mantracourt's strain gauge amplifiers, digitisers and controllers.
