operameter

from The Century Dictionary.

• noun An instrument for indicating the number of movements made by a part of a machine, as the turns made by a shaft, the oscillations of a working-beam, the delivery of sheets from a printing-press, or the reciprocations of a cross-head, etc., in a stated interval of time.

from the GNU version of the Collaborative International Dictionary of English.

• noun An instrument or machine for measuring work done, especially for ascertaining the number of rotations made by a machine or wheel in manufacturing cloth; a counter.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun archaic An instrument or machine for measuring work done, especially the number of rotations by a machine or wheel in manufacturing cloth.