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Micro-IRHD Laser Sample Positioning

Micro-IRHD Hardness tester with laser centring device for the automatic serial measure of O-ring and small rubber parts

Standards the instrument complies with:
Prove della gomma - Durezza in gradi internazionali IRHFIAT 50408
Rubber & Elastomers
Rubber, vulcanized or thermoplastic — Determination of hardness — Part 2: Hardness between 10 IRHD and 100 IRHDISO 48-2Standard Test Method for Rubber Property—International HardnessASTM D1415

Gibitre Automatic Hardness Check
is currently installed in
36 countries
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This instrument permits to perform automatically the measure of the micro irhd hardness of one test piece which has been placed on the sample holder.

• The instrument is supplied with laser centering device and motor-controlled sample holder for the displacement of the part to be measured.
• The sample holder moves the test piece under the laser centering tool and then places the optimal test point of the part under the micro-irhd testing unit.
• The positioning and hardness measuring is performed automatically without intervention of the operator.
This instrument is ideal to obtain quick and repeatable results when small parts are tested which are difficult to be centered manually.

Use of the Instrument 
The sliding sample-holding device of this instrument permits to test one single part and requires the manual replacement of the part at the end of the test.

To perform the test you simply need to:
• Place the part to be tested across the test line of the motor-controlled sample holder
• Insert the identification of the product
• Press start
• Wait for the sample holder to moves back to the start position when the sample has been tested.
• Remove the tested part and put the next one to be tested on the sample holder
• The results obtained can be printed and saved.

Indentor with Ruby Sphere 
Gibitre is the only world manufacturer of Micro-irhd hardness testers that uses a Ruby ball indentor for Micro-irhd hardness testers.
This technological choice guarantees:
• perfect sphericity
• perfect surface finish
• very low wear of the ball even in very demanding conditions of use

HardnessCheck Software 
The software is optimized for the automatic execution of tests and allows:
• Quick identification of products
• Automatic configuration of the instrument according to the product
• Automatic comparison with the tolerance limits set for the product
• Saving of Results, Curves and outcomes in the SQL database
• Statistic analysis
• Preparation of customized reports in language

Part Scan Function: Measure automatically parts with non-symmetrical shape 
The Part Scan Function allows you to choose the position in which the automatic hardness measurement must be carried out even for very complex parts.
The measurement position is associated with the product code and reused for subsequent measurements.
Calculated Results: IRHD Hardness 
The software allows you to prepare customized test procedures that include all the calculations required by the standards and product specifications. The dedicated page describes all the available calculations.
Accredia Calibration of the instrument 

Gibitre Instruments is Accredited Accredia laboratory according to ISO 17025 Standard

The instrument can be supplied with an ACCREDIA calibration certificate issued by the Accredia laboratory of Gibitre instruments.
The calibration is carried out according to the Technical Procedure approved by Accredia and in compliance with the requirements of the ISO 48-2 standard.
The Calibration refers to:
• Dimensions of the Indentor and Annular foot
• Forces applied by the indentor and the annular foot
• Displacement of the indenter
• Duration of the test

Management of Test Results 
The results and test curves of all the tests carried out are saved in the Gibitre SQL database and are available through the Datagest program.

Datagest is the Laboratory Information Management System (LIMS) which is always installed in combination with all Gibitre instrument-control programs.
The program is the collector for all the test result produced with the instruments connected and permits to manage the common Archives used by the instruments (Product List, Customer List, Tolerance limits, Order List, etc)

Industry 4.0 integration 
The instrument and the software have been specifically developed to optimize integration with other environments.
The database in SQL format and the Gibitre_Company_Connect program allows you synchronize your company management software with Gibitre database and to speed up the identification of the tests and to use bar-code readers or similar devices.
The automatic logging service permits to send alarm information to the cloud-service platform of Gibitre Instruments in order to optimize the reaction times of the Service Support.

Test report 
Can be printed or saved to pdf in one of the available languages. The format of the Test Report can be customized by the user.

Example of Test Report (Micro IRHD)

Example of Test Report: IRHD+Hysteresis
Tolerance Limits 
The Datagest program allows you to define specific tolerance limits for each Product, Customer, Test Procedure and Aging Treatment.
For each result to be calculated, tolerance limits and alarm limits can be defined.
The comparison between the results and the tolerance limits is carried out automatically at the end of each test: the test results are colored (Green, Yellow or Red) based on the outcome of the comparison with the limits.
The outcome of the check is saved in the database together with the results.

Statistics of ongoing tests 
The programs automatically process the statistical analysis of the tests in progress by calculating:
• Maximum
• Minimum
• Average
• Median
• Standard deviation
• Cp
• Cpk
In addition, the Gaussian curve relative to the results is shown together with the tolerance limits to immediately highlight the progress of the tests in progress.
The Datagest program allows you to process more detailed statistics related to the saved results and to represent X and R Charts by grouping data by order, batch, batch, date, etc.
Technology of Micro-IRHD device  
The micro-irhd testing units produced by Gibitre measure the force applied to the sample using a load cell.
This technology, widely used for the hardness testers for metals, permits to eliminate the effect of friction in the application of the force and improves the test repeatability.

Characteristics of the laser centering device and of the sample-positioning system 
The laser sensor used is class 2 type and has 0.002 mm reading resolution.
The sample positioning disk permits to set the position of the test piece with 0.005 mm accuracy.
The combination of accurate measuring and sample positioning devices ensures a very high repeatability of the results obtained even when very small parts are tested.

Safety devices 
The instrument includes safety devices to eliminate potential risks during the automatic working.
• Test stops in case of incorrect sample centring
• Test stops in case of overload of the indentor
• Test stops in case of missing laser reading or sample positioning reading.

The instrument is supplied with CE Labelling

Hardware requirements 
• Programs can be installed on standard PCs with WINDOWS 7, 8 or 10 OPERATING SYSTEMS.
• The CONNECTION between the instruments and the PC is made using the USB CABLE supplied with the instrument.
• The programs are COMPATIBLE WITH ANTIVIRUS, and other programs installed on the PC.

Language Selection 
All the programs produced by Gibitre are multi-language and allow the operator to select the language of use.
The test report can be produced in the desired language regardless of the language of use of the program.
The languages available at the moment are: Italian, English, German, French, Portuguese, Russian, Chinese, Japanese, Turkish, Polish, Czech

Development and production 
The instrument is totally developed and produced in the plant of Gibitre Instruments in Italy.
All the mechanical parts are produced in the company workshop using modern CNC machines.
Components and sensors from well-known brands are selected in order to ensure the maximum reliability in the measures
Internal trained personnel takes care of all the production stages: assembly, start-up, calibration, packing, shipment and installation.

Technical specifications
Reference Standards
Standards the instrument complies with:  FIAT 50408; ISO 48-2; ASTM D1415;  
Instrument Characteristics
Test modality   Serial automatic testing of the parts placed across the test line of the sample holding disk  Unit of measure  IRHD-M (micro)  Resolution  0.01 irhd point  Laser Device  Class 2 laser sensor
Resolution: 0.002 mm
Sample thickness  Between 1 and 20 mm  Instrument Control  With Gibitre-Hardness software  
Tolerance verification   Comparison of test results with the tolerance limits set for the product  Results storage  Test Results and curves are saved in the SQL database which is installed together with the software.  Graphs   Rubber Relaxation curve (hardness versus test) time in linear and logarithmic axes  Data analysis   Mean, std. Dev., min, max, Cp, Cpk of test results. X-Chart and Gaussian distribution  Calculated Results  • IRHD Hardness
• Thickness of the sample
• Angle coefficient of hardness relaxation curve
• Hysteresis (sample return after set time from load removal)
• Correction of hardness according to the thickness of the sample 
Software usage Languages  Italian, English, French, Spanish, German, Portuguese, Russian, Chinese, Japanese, Turkish, Polish, Czech 
Safety Devices
Labelling  CE Labelling 
Calibration  Electronic calibration
Report with traceability to primary references
ACCREDIA calibration Certificate (optional)
Technical specifications
Power supply  110-240 V, 50/60 Hz, 15 W, single phase  Dimensions  (W x D x H) 470 x 350 x 600 mm  Weight   37 Kg 
Personal computer
Personal computer  Minimum Configuration: Intel Core I3 2 GB RAM.
Compatible Operating Systems: Windows 7, 8 and 10;
Connection to the instrument via USB Cable (included) 
Product leaflet

General catalogue

Calibration certificate


Which is the difference between Shore A and IRHD Hardness test results?
Test results of tests performed with IRHD (ISO 48-2) are are similar to the ones obtained with Shore A test (ISO 48-4), especially for low hardness. However, they are not strictly the same. Indeed, depending on the shape of the part, we can regularly notice 2 to 5 points hardness difference between Shore A and IRHD measurement done on the part. This difference can even be extended to 10 points difference in extreme cases. In general, IRHD results are lower to Shore A results. That is why it is common to use “75 Shore A compounds” to obtain “70 IRHD part”. For example, parts moulded with a “70 Shore A compound” can give finished parts with a hardness from 62 to 65 IRHD, and therefore out of the 70±5 IRHD tolerance. The correct method to obtain the expected result in terms of IRHD hardness is to measure the result obtained at the end of the transformation process, compare it with the tolerance limits and correct the compound formulation by the number of points necessary to 'center' the result. This operation must be carried out for each mixing recipe and for each transformation process.
How should I correct the Shore A hardness of the compound to obtain the requested IRHD Hardness of my finished part?
The correct method to obtain the expected result in terms of IRHD hardness is to measure the result obtained at the end of the transformation process, compare it with the tolerance limits and correct the compound formulation by the number of points necessary to 'center' the result. This operation must be carried out for each mixing recipe and for each transformation process.
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