Gefran has equipped the latest generation of its magnetostrictive displacement transducers with its own Hyperwave technology. Thanks to a modified arrangement of the receiver coil, the longitudinal wave component is mechanically suppressed and only the desired torsional signal component is included in the measurement. As a result, the signal-to-noise ratio of the Hyperwave sensors is 15 times better than that of previous models. This makes the signal much more stable against vibrations and shock and guarantees high EMC immunity of the non-contact position transducers as well as their consistently precise and continuous operation. In addition, these sensors guarantee high repeat accuracy with a very low non-linearity error. They are suitable for a wide range of temperatures from minus 30 to plus 90 degrees Celsius and are particularly reliable even at extreme values.

High vibration tolerance
In detail, the new magnetostrictive displacement transducers are characterized by a high tolerance to vibrations and shocks. The position is determined by the interaction of two magnetic fields: The first magnetic field is generated by a current pulse along the entire sensor and interacts with the second, consisting of the position magnet, which is attached to the moving axis. The magnetostrictive mode of operation without mechanical contact makes the system virtually wear-free, significantly reducing downtimes and ensuring an almost unlimited service life. The devices are also equipped with a waterproof housing in accordance with protection class IP67. Thanks to these properties, the non-contact magnetostrictive displacement transducers are ideally suited for use in demanding industrial environments.

Profile or rod
The manufacturer offers the non-contact displacement transducers in either profile or rod design. The profile type can be used universally and can be easily mounted directly on the structure to be measured using brackets. The position sensor is either free or guided. In the rod design made of stainless steel, these displacement transducers are primarily used in hydraulic cylinders with operating pressures of up to 350 bar to record the position of the piston in real time. Thanks to a magnetic float design, they can also be used as level sensors. Both designs are available with analog signal or digital interfaces (such as SSI or fieldbuses such as CANopen, Profibus, ProfiNET). The large selection of analog outputs enables the direct measurement of displacement and speed as well as inverse measurement with the highest precision and maximum repeat accuracy.

Both types are available in three different versions: General with a measuring range of up to 1,500 millimetres, Plus up to 2,500 millimetres and Advanced up to 4,000 millimetres. Typical applications include dancer control (basic version), presses (Plus versions) and injection molding machines, wind turbines or dam gates (Advanced version). dsc