As a high-performance hardness-testing instrument, the pen-type Leeb hardness tester is engineered to satisfy diverse hardness measurement requirements across many industries, especially for on-site and portable inspection scenarios. Manufactured by Mikrosize, a trusted provider of reliable testing solutions, every unit of this Leeb hardness tester meets stringent quality standards and professional technical specifications.
All models in this series are fitted with a D-type impact device. Featuring a brand-new overall design focused on portability and ease of use, the compact instrument supports partial one-handed operation. Operators can easily carry and deploy it in confined spaces or outdoor work sites. Whether testing mechanical parts inside factory workshops or inspecting equipment components in the field, this tester delivers consistent, stable performance.
It is equipped with a large high-contrast dot-matrix OLED display, paired with a redesigned user interface and responsive button controls. Measurement readings, material selections and operational prompts remain clearly visible even under low-light conditions, greatly improving convenience for on-site inspections.
For data transmission and processing, this pen-type Leeb hardness tester includes built-in Bluetooth capability. Test data can be printed in real-time via a compact Bluetooth printer, so users can obtain hard-copy test reports immediately for record-keeping and report compilation. Data may also be sent to an optional dedicated mobile detection app for storage, analysis and further post-processing. This capability brings significant value to large-scale test projects requiring centralized data management.
What differentiates this series from standard models is its enhanced professional suitability for the power-generation industry. Building upon the standard version, it adds nine dedicated hardness test modes for high-alloy steel materials widely used in power facilities. These test modes fully comply with the industry standard DL/T 1845-2018, Leeb Hardness Test Method for High Alloy Steel in Power Equipment. This makes the instrument an essential tool for power plants, electrical equipment manufacturers and field maintenance teams.
Based on feedback from industry end-users, Mikrosize has optimized these functions to achieve accurate hardness measurements for high-alloy steel components including turbines, generators and process pipelines, delivering trustworthy data to support equipment safety evaluations.
Another core advantage is its custom material conversion function. Conventional Leeb hardness testers frequently suffer from inaccurate readings and large measurement errors when relying on factory-preloaded conversion tables, particularly for non-standard or specialty materials. To address this pain point, this tester allows users to create custom hardness conversion tables through comparative testing. By correlating instrument readings against certified reference values for given materials, operators can calibrate conversion logic to achieve high measurement accuracy for those specific materials. This greatly expands the instrument’s application coverage, ranging from common metals such as carbon steel and aluminum alloy, to specialty materials used in aerospace and automotive manufacturing.
Working Principle
This pen-type Leeb hardness tester is a precision measurement device operating on the rebound principle of the impact body. Driven by elastic force, an impact body of defined mass strikes the specimen surface at a set speed. At 1 mm distance from the specimen surface, high-precision sensors capture both the impact speed (VA) and rebound speed (VB) of the impact body. The Leeb hardness value (HL) is calculated with the formula below:
HL = 1000 × VB / VA
Where: HL = Leeb hardness value (primary measured parameter) VB = Rebound speed of the impact body (detected by internal high-precision sensors) VA = Impact speed of the impact body (calibrated during production to guarantee consistent performance)
Thanks to this measurement principle, the tester can perform rapid, non-destructive hardness tests for various metal specimens. Its test results correlate closely with those obtained from laboratory-grade testing equipment. Mikrosize developed this product to bridge the gap between convenient on-site operation and laboratory-level measuring accuracy.
Product Features
Excellent Portability & Ergonomics Compact and lightweight, the unit fits easily inside toolboxes or backpacks. Support for one-handed operation reduces operator fatigue during extended testing tasks.
High-Quality Display The 128 × 64 dot-matrix OLED screen delivers outstanding contrast and readability. Measured values, material names and battery status stay legible under bright sunlight as well as dim indoor surroundings.
Custom Material Conversion Function As described above, users can generate proprietary hardness conversion tables through comparative tests. This resolves inaccuracies caused by pre-installed tables and enables reliable testing for specialty materials used in niche industrial sectors.
Automatic Impact-Direction Recognition Built-in sensors automatically detect common impact orientations including vertical, horizontal and downward-facing testing. No manual angle adjustment is required, ensuring dependable readings regardless of test orientation and boosting on-site work efficiency.
Data Storage It stores averaged results for up to 100 measurements. Historical records can be reviewed without connecting external devices — ideal for consecutive batch-specimen testing.
Hardness Limit Alarm Users can configure upper and lower hardness thresholds. When measured results go beyond preset limits, audible and visual alerts trigger, helping operators quickly identify non-conforming samples in batch inspection work.
Multi-Scale Hardness Conversion The tester supports alternative hardness-scale conversion tables for Rockwell, Brinell, Vickers and more. Users can cross-reference readings against international standards, making the instrument suitable for global-scope projects.
Reading Calibration Software-supported reading calibration allows users to calibrate the instrument conveniently with standard test blocks, preserving long-term measuring accuracy. Mikrosize provides detailed calibration guidance to assist correct on-site operation.
Wireless Data Output Beyond Bluetooth printing, Bluetooth connectivity (optional) links the tester to the dedicated smartphone measurement app. The app offers advanced capabilities including data plotting, automated report generation and cloud data storage to extend overall instrument functionality.
Intelligent Power Management An adjustable auto-shutdown feature helps conserve battery power when the unit is idle. Auto-shutdown delay can be set between 1 minute and 10 minutes, or the function can be fully disabled.
Long-Endurance Built-in Battery Powered by a memory-effect-free built-in rechargeable lithium-ion battery with Type-C charging port. It can be conveniently recharged with ordinary phone chargers or portable power banks. A full charge delivers up to 8 hours of continuous testing to satisfy full-day on-site working demands.
As a leading hardness-testing solution from Mikrosize, this pen-type Leeb hardness tester combines portability, accuracy and broad applicability. It serves as an ideal choice for power-generation, machinery, automotive, aerospace and other industries. Whether deployed for routine maintenance, quality inspection or product development, it delivers reliable and efficient hardness-testing performance.
