Test Sieve Shaker

''EFI'' Test sieve shaker introduced to accurately reproduce the circular and tapping motion given testing sieves in hand-sieving. Uniform, mechanical action assuring dependable, comparable tests. The Ro-Tap has become the unquestioned standard of comparison in all laboratories.
Sieve shaker designed to Back and forth lateral motion is combined with up and down and tilting motions to cause test material to travel in an orbit on the sieve surfaces. This forced travel assures full use of sieve mesh area without precise leveling of the tester. The Tester holds 6 full-height sieves and pan or 13 half-height sieves and pan.