The Electrodynamometer is made of a squirrel-cage rotor fitted in a dc-excited stator. Mechanical loading is achieved by increasing the stator field current, which generates eddy currents in the driven rotor. The stator is trunnion-mounted on ball bearings and rotates against a helicoidal spring to oppose braking torque.

The front-end bell is provided with a circular scale that indicates the torque developed. The circular scale is graduated in Imperial units (lbf⋅in). A damper lever is located underneath the dynamometer to prevent oscillation if the power supply is applied while the dynamometer is turning. To measure the torque, this lever can be pushed to adjust and read the torque. The Electrodynamometer is electrically powered from standard fixed ac line supply.

The Electrodynamometer can be coupled to a 0.2 kW drive motor through the use of the Timing Belt, Model 8942. The faceplate can be lowered to provide access to the inside for coupling the Electrodynamometer to the drive motor. When closed, the faceplate is secured by two quick-lock fasteners.

A variant of the model expressing values in the International System of Units (SI) is also available (see Model 8911-1).