For extremely accurate belt tension measuring, the Gates Sonic Tension Meter is an electronic device that measures the natural frequency of a free stationary belt span and instantly computes the static belt tension based upon the belt span length, belt width and belt type.
Features:
Can be used for synchronous and V-belts
Uses sound waves instead of force/deflection
Results are repeatable with any operator
Portable, lightweight and easy to use
Fast. Calculates tension in seconds
Can be used in almost any environment
Model 508C runs on two AAA batteries