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Home » Products » PENDULUM HARDNESS TESTER » PENDULUM HARDNESS TESTER

PENDULUM HARDNESS TESTER

PENDULUM HARDNESS TESTER
PENDULUM HARDNESS TESTER
Product Code : 622
Product Description

As a leading exporter and supplier, we are instrumental in offering our clients a wide range of Pendulum Hardness Tester. These testers are specially designed to evaluate the hardness of pain and related coatings in science and industrial labs. We make sure that, these devices are sourced from reliable vendors who design them by using top quality materials and modern technology. Our Pendulum Hardness Tester is offered to the clients at a reasonable price.

Features:

  • Easy to use
  • Zero maintenance
  • Modular design

Further Details:

Description

The instrument consists of a pendulum which is free to swing on two balls resting on a coated test panel. The pendulum hardness test is based on the principle that the amplitude of the pendulum's oscillation will decrease more quickly when supported on a softer surface. The hardness of any given coating is given by the number of oscillations made by the pendulum within the specified limits of amplitude determined by accurately positioned photo sensors. An electronic counter records the number of swings made by the pendulum. A transparent acrylic case excludes droughts.

Standard hardness tests relate oscillation damping to surface hardness. The Konig test for hard coatings measures the time taken for the amplitude to decrease from 6
o to 3o. The Konig pendulum is triangular with an adjustable counterpoise and swings on two ball bearings of 5mm diameter which rest on the test surface. The counterpoise is used to adjust the period of oscillation to the specified 1.4 seconds. The Persoz test for soft coatings measures the time for the amplitude to decrease from 12o to 4o. The Persoz pendulum is a square frame with a pointer. It is supported on ball bearings of 8mm diameter and the overall weight is greater than the Konig pendulum. The times taken in Persoz tests are approximately double those in Konig tests and so the Persoz has a greater degree of discrimination. The Persoz does, however tend to skid on harder surfaces.

The influence of surface smoothness, film thickness, temperature and relative humidity must all be carefully controlled

Specification

 

Persoz

Konig

Amplitude limits

12o to 4o

6o to 3o

Period of oscillation

1 s

1.4 s

Damping time on glass

420 s

250 s

Pendulum weight

500g

200g

Ball bearing diameter

8mm

5mm

Standards

ASTM D4366-95

Standard Test Methods for Hardness of Organic Coatings by Pendulum Damping Tests

BS EN ISO 1522:2001,
BS 3900-E5:1998

Paints and varnishes. Pendulum damping test

DIN 53157

Pendelhrte nach Knig gem

NFT 30-016

Persoz pendulum


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