Automatic Standardized IRHD-M Hardness Testing
The LNP® Universal Tester is a precision benchtop hardness tester designed for the automatic determination of hardness in elastomers, rubber, plastics, and other synthetic materials using the IRHD-M method in accordance with ISO 48 and DIN ISO 48.
Measurement at the Touch of a Button
Once the sample has been positioned and the test program started, the instrument automatically controls the movement of the measuring head, the timing of the test sequence, and the evaluation of the result. The automated procedure minimizes operator influence and helps ensure consistent test conditions for both individual and series measurements.
For Small and Geometrically Complex Components
The IRHD-M method is particularly suitable for small and thin products such as O-rings, seals, diaphragms, coatings, and technical elastomer components. Depending on the sample geometry, the system can be expanded with a camera, linear axes, a rotary table, or special fixtures.
Documentation and Quality Control Integration
The system includes software for test control, result recording, and documentation, as well as a convertible notebook running Windows. On request, the instrument can also be equipped with integration into a quality management database, a scanner, label printer, or additional automation equipment.
LNP® Universaltester is a fully automated benchtop system for standardized hardness testing of elastomers, rubber, and plastics using the IRHD-M method. A high-precision measuring head, motorized Z-axis, granite base, and dedicated software provide stable conditions for laboratory quality control and series measurements.
The Universal Tester combines a standardized test sequence, automatic measuring-head movement, and software-based result processing in a single workstation. The configuration can be expanded according to sample geometry, the number of measurement points, and the required level of automation.
Once the sample has been positioned and the program started, the instrument automatically controls the movement of the measuring head, the load timing sequence, and the calculation of the resulting hardness value.
The supplied software provides test control, result recording, and documentation. Integration with a quality management database can be added on request.
For multi-point measurements or geometrically complex parts, the system can be equipped with a camera, linear axes, a rotary table, angle adjustment, or specialized fixtures.
The benchtop system design and automatic measuring cycle are intended for repeatable evaluation of small elastomer and plastic products.
Automatic control of movement, force, and timing reduces deviations associated with manual test execution.
The IRHD-M method is suitable for O-rings, seals, coatings, and other products for which conventional Shore hardness testing is difficult or unsuitable.
The software supports systematic recording, evaluation, and documentation of both individual and series tests.
Optional axes, a rotary table, camera, and fixturing elements allow the workstation to be adapted to specific products and measurement tasks.
IRHD-M is the micro-scale version of the International Rubber Hardness Degree method, intended primarily for small and thin samples made of elastomers, rubber, and suitable plastics.
A spherical indenter first applies a preliminary force, followed by a defined main force. The resulting hardness is determined from the difference between the indentation depths reached.
Sample geometry and thickness can affect the result. Special fixtures or rotary positioning elements can be used for complex shapes.
The values correspond to the standard configuration of the LNP® Universal Tester IRHD-M, order number 034332.
| Tested Materials | Elastomers, rubber, plastics, and synthetic materials |
|---|---|
| Test method | IRHD-M according to ISO 48 / DIN ISO 48 |
| Resolution IRHD | 0,01° |
| Level of Automation | Fully automatic measurement |
| Measuring Head Lowering Speed | 3,2 mm/s |
| Maximum Sample Dimensions X × Y × Z | 250 × 200 × 250 mm |
| Instrument Dimensions X × Y × Z | 250 × 350 × 550 mm |
| Control Unit Dimensions X × Y × Z | 150 × 200 × 80 mm |
| Instrument Weight | Approx. 29 kg |
| Order Number | 034332 |
The standard configuration includes a complete measurement workstation. Additional components are selected according to sample geometry, the required level of automation, and the preferred method of data management.
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