König Persoz Pendulum Hardness Tester

A pendulum resting on a coated surface is set into oscillation, and the time for the oscillation amplitude to decrease by a specified amount outlined in this International Standard is measured. The shorter the damping time, the lower the hardness.
Two test procedures are discussed in detail: the König and Persoz methods. (The Persoz and König methods differ in the period and amplitude of the oscillation. The Persoz test measures the time taken for the amplitude of oscillation to decrease from 12° to 4°, while the König test measures from 6° to 3°.)
Although both Pendulum Hardness Tester instruments operate on the principle that the amplitude of oscillation of a pendulum touching a surface decreases more rapidly on softer surfaces, they vary in dimensions, period, and amplitude of oscillation.
The QualiPHT König Persoz Pendulum Hardness Tester is the newest product compliant with the following National and International Standards: ISO 1522; ASTM D4366; BS 3900-E5; DIN 53157; NBN T22-105; NF T30-016.
It’s a user-friendly instrument and is available in three model types: Persoz, König, and a combined Persoz and König model.