The plaromaster® MR are the worlds leading variable-speed gearboxes in the explosion-proof area according to ATEX 95. They use the principle of elasto-hydrodynamic power transmission and are infinitely adjustable from and to zero speed, even with the highest starting or breakaway torques. They can be operated manually by means of a hand wheel. Due to the characteristics of the system, they cannot slip through complex and costly ATEX external monitoring is not necessary.