SHIMPO DT-105A

Accurate up to 0.006 +/- 1% Digit (6 RPM Max) (10,000 to 25,000 RPM), 0.001 RPM Resolution, Contact Tachometer 7.185 Inch Long x 2.3622 Inch Wide x 1.811 Inch Meter Thick, 0.1 to 25,000 RPM Measurement