ABOUT PRODUCTS RESOURCES QUOTES/ORDERING  
1-800-762-2478   Facebook Twitter Twitter 


 Abrasion
 Adhesion
 Application
 Color/Gloss
 Density
 Dispersion
 Drum Handling
 Drying Time/Gelation
 Film Flaws
 Film Thickness
 Hardness
 Impact & Flexibility
 Lab Apparatus
 Measuring Instruments
 Moisture/Air/Temp.
 Optical Instruments
 pH & Conductivity
 Publications
 Surface Profile
 Surface Tension
 Viscosity
Home  >>  Products  >>  Hardness  >>  Koenig & Persoz Hardness Rocker
Koënig & Persoz Hardness Rocker

Koenig and Persoz Hardness Rocker

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. These instruments meet the requirements of ISO 1522, ASTM 4366, DIN 53157, and BS 3900: E8.

The Persoz test measures the time taken for the amplitude to decrease from 12° to 4°. The Koënig measures time taken from 6° to 3°.

The times taken in Persoz tests are approximately double those in Koënig tests and so the Persoz has a greater degree of discrimination. The Persoz does, however, tend to skid on harder surfaces.

 




FEATURES TECHNICAL DATA PRICE LIST
 

 

Features

top

The instrument is supported on a heavy cast iron base for stability. The apparatus must be leveled. The base is fitted with leveling screws, and a spirit level is mounted to the test panel support platform. The mechanism to support the test panels is common to both tests. A platform, onto which the test panel is placed, is lifted, by means of a remote lever. As it is lifted, the bearings of the pendulum come into contact with the test surface and the weight of the pendulum is taken by the sample.

In addition to the zero point, the scale is marked at the angles relevant to the test specifications, i.e. 12 and 4, or 6 and 3, or all four angles. At these limits, a photo-sensor is accurately positioned to register swings of the pendulum. The pendulum is cocked with a swinging arm. It is held in its start position by a lock pin, which is released by a flexible cable trigger.

The hardness of any given coating is given by the number of oscillations made by the pendulum within the specified limits of amplitude. The signals from the photo-sensor are registered by an automatic electronic counter, and the result of a test is shown on the digital display. The influence of surface smoothness, film thickness, temperature and relative humidity must all be carefully controlled, therefore, the instrument is housed in a perspex case.

 

Technical Data

top
Technical Data
  Persoz Koënig
Amplitude Limits: 12 - 4 6 - 3
Period of Oscillation: 1 sec 1.4 secs
Damping Time on Glass Plate: 420 secs 250 secs
Pendulum Weight: 500g ±0.1 200g ±0.2
Ball bearing Diameter: 8mm 5mm

 

Prices

top
Prices subject to change    Prices listed in US dollars for domestic shipments within US, Canada, & Mexico only    Export orders require quotations - click here for a quote     For more info call us 1-800-762-2478 or 954-946-9454.
Item Number Item Prices
HA-707/PK Pendulum Hardness Tester equipped for both tests $5,717.00
All models supplied with full operating and calibration instructions. 220/50Hz also available.



top

Call HAVE QUESTIONS?
    1-800-762-2478
Email PREFER TO EMAIL?
    gardner@gardco.com
  FIND PRODUCTS LEARN MORE ORDERING INFO ABOUT US
  By Category Email Registry How to Order Contact Info
  By Industry Trade Shows Request Quote History
  New Products Test Lab Info Order Form FAQ's
  Monthly Product Articles/Links Sales & Clearance Policies




  © 2018 Paul N. Gardner Company, Inc. | Contact | Policies Facebook  Twitter  YouTube  Blogger