The Morehouse Ring Dynamometer is an instrument designed to measure mechanical forces. Its applications include the checking of mechanical and hydraulic presses, universal testing machines, Brinell hardness testers and other force measurement systems.
The ring dynamometer consists primarily of an elastic steel ring and a precision dial indicator. When force is applied to the ring, a change in diameter, or deflection, occurs. This deflection is measured by the indicator in terms of divisions, which is translated into force by means of a calibration.