Pendulum Hardness Tester

For Coatings

This method evaluates hardness by measuring the damping time of an oscillating pendulum. The pendulum rests with 2 stainless steel balls on the coating surface. A physical relationship exists between oscillation time, amplitude and the geometric dimensions of the pendulum. The viscoelastic behavior of the coating determines its hardness.

When the pendulum is set into motion, the balls roll on the surface and put pressure on the coating. Depending on the elasticity, the damping will be stronger or weaker. If there are no elastic forces, the pendulum will damp stronger. High elasticity will cause weak damping.

Two types of pendulums were standardized for this test method:

Pendulum Hardness Tester

According to ASTM D 4366, & DIN EN ISO 1522

Simple laboratory measuring instrument for hardness measurements in accordance with the König and Persoz methods.

• Automatic counter with acoustic signal when the deflection is below 3° (König) or 4°  (Persoz) respectively
• Registration of pendulum deflection by means of 2 light barriers
• Digital counter
• Changeable from König to Persoz by means of a third light barrier
• Selector switch for display in seconds or number of oscillations

Replacement & Accessories:

For further information or to place an order for the Pendulum Hardness Tester For Coatings CLICK HERE, call us Toll-Free at: 1.877.884.TEST, or click on the "HOW TO ORDER" Button