The EMS 755 consists of a sieve clamp, an oscillation system and a special control module for setting the amplitude. The sieve clamp is firmly connected to the armature which is resiliently coupled with an oscillator coil. By means of the electronic control module the field tension of the oscillator coil can be changed and thus the intensity of the magnetic field controlled This modifies the amplitude of the sieve clamp in horizontal direction. In addition to the horizontal movement the suspension of the oscillator part ensures a vertical oscillating movement. This causes the remaining larger particles in the sieve openings to be released and the sieve itself to be opened again.

The adjusted intensity by means of the control module determines the mechanical energy acting on the sieve. An additional power switch guarantees an interruption as well as a re-start of the EMS 755 with the same intensity as far as the intensity had not been changed before at the control module. The EMS 755 can be mounted onto the stand (diameter 15 mm) by means of the integrated stand clamp which can easily be positioned at any distance to the ground. The device can easily be handled, conveniently be operated and shows a high stability and reproducibility of the oscillator intensity.