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Pendulum Hardness Tester

Test method in accordance with: ASTM D 4366, DIN 53 157, ISO 1522, SNV 37 112, NFT 30 016.

Pendulum Hardness Tester Evaluation of the hardness of paints and related coatings in accordance with standards. The procedure as per König is based on the measurement of the damping of a pendulum oscillating on the paint film. The application of this procedure is subject to the following conditions:
  • substrate must not deform or vibrate under load of pendulum

  • film thickness of at least 30μm (1.2 mils) to minimize substrate influences

  • paint films to be compared must not deviate more than 10% in their film thicknesses

  • surface of coating must be smooth and free of disturbances. Coarse pigment agglomerations, poor leveling properties, dust, etc. cause false measurements.
The principle of the pendulum hardness test is based on the fact that the amplitude of oscillations of a pendulum resting on a sample decreases more rapidly the softer the films. The time in seconds (damping time) for the pendulum deflection to slow down to a specific value is taken as the hardness of the coating. The test methods are standardized as per König and Persoz.


 

Specifications   König Persoz
Weight: 200g ±0.2 500g ±0.1
Ball Diameter: 5mm/0.2 in. 8mm/0.3 in.
Deflection: Start 6° 12°
End 3° 4°
Period of Oscillation (1 Oscillation): 1.4 s 1 s
Damping Time: 250 x ±10 s 430 s ±10 s

 

Components

Base unit with protective cover, cable release, glass plate, spirit level, mains cable and screw driver König pendulum — Cat. No. HA-5856

 

Available items
Item Number Item
HA-5854 Pendulum Hardness Tester König with digital counter, LED indication, protective cover third light barrier with switch for quick change of measuring method, acoustic signal at end of test, and switch for choice of values oscillation or seconds
HA-5855 Pendulum Hardness Tester Persoz with digital counter, LED indication, protective cover third light barrier with switch for quick change of measuring method, acoustic signal at end of test, and switch for choice of values oscillation or seconds
HA-5856 König Pendulum, optional (Specify current)
HA-5857 Persoz Pendulum (Specify Current)
HA-5860 Cable Release

 

 

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