The strain gauge (DMS) rests on the principle, that a part is mechanically deformed and this deformation is relayed by a meander-formed wire (=DMS). Through the strainingof the wire, a varying electric resistance occurs, which consequently represents the measurement of the materials mechanical deformation.
This procedure is frequently used for tension- and pressure measurements and appears to be simple in its application to determine a torque value, the DMS-gauge is generally arranged 45-degrees to the torsion axis and the electrical resistance is obtained by using several gauges.
The usable linear area between the torque and the resistance change is not as large as with the Piezo transducer. They are made to correspond with the respective torque-ranges of our screwdrivers. Because of the rather large spread and many different standard available components, this is a relative low-cost solution.
Our products are located in PDF Product Catalog D 3020.
The torque-transducer are suitable for the use in stationary measuring platforms as well as in mobile torque-wrenches in inline or angle-head design. The transducers are designed to connect with the corresponding measuring electronic.
The torque-wrenches additionally allow the on-site testing of stationary screwdriverswithout the need to remove them from an automatic screwdriving station. The torque wrenches are equipped with lateral flats on the measuring-head, so that they can be clamped into a vice.
Together with the suitable measuring instrument, these torque wrenches may also be used for the testing of made connections by re-tightening (or loosening) of the connection. DEPRAG torque measuring systems combine the application-variety of conventional torque wrenches with the precision and the capabilities of today's most modern electronic measuring technology.