MHLS-300 Portable Leeb Hardness Tester

The MHLS-300 is a portable Leeb hardness tester from Laizhou Jincheng Industrial Equipment Co., Ltd. for routine metal material evaluation, materials laboratory work, and technical education. Using the Leeb rebound method, it enables users to measure accessible metal components without moving large castings, shafts, forgings, welded structures, or installed equipment to a bench-top tester.

Why portable Leeb testing is useful

Mobile testing: supports hardness checks on workpieces that are large, installed, or difficult to transport.
Practical instruction: gives students and trainees a direct way to learn impact testing principles and result comparison.
Documented measurements: stores test records for laboratory batches, training exercises, and internal review.

Parameter	Specification
Measurement method	Leeb rebound hardness testing
Measurement accuracy	±6 HLD
Hardness conversions	HRC, HRB, HB, HV, HSD and MPa reference values
Compatible impact devices	D, DC, DL, C, D+15 and G; standard configuration includes D type
Data and display	Up to 1,000 records, USB transfer, 160 × 128 backlit LCD
Size and power	154 × 82 × 26 mm; approximately 230 g; 4.5 V, three AAA batteries

Testing, Teaching and Record Management Capabilities

Designed for routine measurement rather than replacing every fixed hardness method, the MHLS-300 combines a standard D impact device, reference block, directional compensation, and digital record handling. This configuration helps laboratories and training teams establish repeatable operating steps while selecting test conditions appropriate to the material and component geometry.

Flexible test positioning

Full-direction settings compensate for horizontal, vertical, upward, and downward measurements, helping users work with accessible surfaces in different orientations.

Reference and scale review

The supplied hardness reference block supports operation practice and basic verification activities. Converted scales assist comparison with technical records when applicable conversion tables are used.

Digital measurement records

Storage for up to 1,000 readings and USB hardness data transfer support result review, report preparation, classroom exercises, and digital archiving. A wireless miniature printer is optional.

Suitable users and evaluation considerations

The MHLS-300 is suited to materials laboratories, technical colleges, universities, research teams, manufacturing training departments, and inspection groups that need portable metal hardness measurement. It is particularly useful for demonstrations, preliminary material comparison, and routine testing of suitably supported metal workpieces.

Leeb test results should be evaluated with regard to material type, surface preparation, component rigidity, thickness, curvature, impact device selection, and measurement direction. For formal quality-control work, users should follow applicable standards, material specifications, and approved laboratory procedures. With its practical portable design, Laizhou Jincheng MHLS-300 provides a clear and organized instrument platform for hardness education and routine metal evaluation.