Certified
samples
for Shore A
hardness
Gibitre Instruments provides certified samples for Shore A hardness verification
Standards the instrument complies with:
ASTM D2240; ISO 868; ISO 48-4;
ASTM D2240; ISO 868; ISO 48-4;
Gibitre Instruments’ Certified Test Specimens enable routine verification of hardness testers between calibrations, in accordance with ISO 48-4:2018 (10.2), which prescribes weekly checks against standard rubber blocks. They also support verification programs aligned with ISO 868 and ASTM D2240 for Shore hardness. Because hardness is a key parameter for product conformity, these references help keep the measurement of rubber and other materials under control and reduce the risk of error.
A dedicated geometry allows handling without transferring heat to the measurement area, delivering stable, repeatable results. Each specimen bears an individual label for clear traceability and to prevent interchange. A wooden protective box shields the specimens from temperature fluctuations and sunlight, preserving performance over time.
Delivery includes a Calibration Report with full traceability to the certified instrument used for measurement. Selecting Gibitre specimens equips laboratories wit
Overview
The use of certified samples permits to perform periodical verification of the conformity of the reading of your hardness testers in the period between two calibrations.
According to ISO 48-4 Standard (par. 10.2):'Instruments in regular use shall be checked at least each week against standard rubber blocks.'
Periodical verification is useful considering the importance of hardness as a testing parameter.
Characteristics of the product
Gibitre test pieces
• have a shape that allows them to be manipulated and avoids transmitting the heat of the hand to the measuring zone
• are supplied with a wooden protection box that protects them from sudden changes in temperature and sunlight
• are supplied with a Calibration Report referring to the certified instrument used for the measurement.
Available Configurations
The following configurations are available:
• Complete box containing 3 specimens with approximate hardnesses of 40 - 50 - 60 - 80 - 90 Shore A points.
• Box containing one sample with hardness of your choice among those available.
Calibration Report
The samples are provided with Calibration Certificate with traceability to the hardness tester used for the measurements with Official Accredia Certificate issued by ISO 17025-Accredited Laboratory of Gibitre Instruments.
Unique Sample Identification
Specimens are individually identified by an identification label to ensure proper calibration traceability and avoid measurement errors.
Protection Box
The samples are provide with an insulated protection case that permits the protection of the samples from temperature variations and from the light.
Shape of the samples
The shape of the samples has been developed to permit easy handling without heat transmission to the test area
Protection Box
The wooden box ensures protection against light and temperature variations
Sample identification
The samples have unique identification code to permit the traceability of the calibration
Number of samples
The complete box includes 5 samples. Single samples can be provided
Calibration Report
The calibration report is issued by Gibitre Instruments and includes the traceability to the officially-calibrated hardness tester used for the measures
Duration of the Calibration
The reference blocks shall be recalibrated once a year (ref. ISO 48-4:2018 par. 10.4)
Gibitre Instruments
Via dell'industria, 18
Bergamo (Italy)
te. +39 035 461146
www.gibitre.it
info@gibitre.it
Copyright Gibitre Instruments
