ERC50 Electronic Revolution Counter with built in encoder and digial display.
Mechanical Engineers Rocks. - A tachometer(revolution-counter, Tach,rev- counter,RPM gauge) is an instrument measuring the rotation speed of a shaft or disk, as in a motor or other machine. The device usually displays the
Mechanical Rotating Speed Meter, Mechanical Resettable Revolution Counter, Clockwise Turn Counter-Clockwise Turn, and Turning Number or Winder | Walmart Canada
IVO Mechanical Revolution Counter With Key Reset - U300