Before revision: An electronic counter records the number of swings made by the pendulum .Pendulum Hardness Tester Construction 250px|Persoz pendulum device The pendulum consists of balls which rest on the coating under test and form the fulcrum.
After revision: An electronic counter records the number of swings made by the pendulum Construction 250px|Persoz pendulum device The pendulum consists of balls which rest on the coating under test and form the fulcrum.