Tachometer

Title

Tachometer

Subject

Speed Measurements

Description

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 revolutions per minute (RPM) on a calibrated analogue dial, but digital displays are increasingly common. The word comes from the Greek Ταχος, tachos, "speed", and metron, "to measure".

Source

Property of the W&L Physics & Engineering Department

Files

http://s3.amazonaws.com/omeka-net/2253/archive/files/3f7d02e06a1b7aa15b29ab562a073b17.JPG

Citation

“Tachometer,” Digital Exhibits at Washington and Lee University Library, accessed September 22, 2017, http://omeka.wlu.edu/items/show/202.