MHLS-300 Digital Leeb Hardness Tester for Measurable, Traceable Inspection

The MHLS-300 portable Leeb hardness tester is a digital instrument for hardness measurement and inspection data management of metal materials and components. Developed by Laizhou Jincheng Industrial Equipment Co., Ltd., it uses the Leeb rebound method to support laboratory checks, production quality control, third-party inspection, equipment maintenance, and technical training where workpieces cannot be conveniently moved to a benchtop tester.

Why data management matters

Inspection teams often need more than a single reading. MHLS-300 stores up to 1,000 measurement records and transfers results by USB, providing a practical basis for result review, report preparation, and quality-file archiving.

Multi-scale result viewing

Measures Leeb hardness and automatically converts applicable results to HRC, HRB, HB, HV, HSD, and MPa tensile-strength reference values, reducing manual conversion during routine inspection.

Adaptable field measurement

The standard D impact device supports common metal parts. The host recognizes compatible D, DC, DL, C, D+15, and G devices to match different surfaces, geometries, and access conditions.

Direction-compensated operation

Full-direction settings and direction compensation help inspectors record measurements on horizontal, vertical, upward, downward, and other accessible surfaces of installed components.

Configuration, Technical Parameters, and Suitable Applications

MHLS-300 is suited to castings, forgings, shafts, gears, valves, flanges, welded structures, large moulds, and in-service metal equipment. Its compact body supports inspection at multiple locations, while its digital record functions help quality departments organize batch results after field work.

Parameter	MHLS-300 Specification
Measurement method / accuracy	Leeb rebound hardness testing; ±6 HLD
Data management	Up to 1,000 records; USB data transfer; optional wireless mini printer
Display / impact devices	160 × 128 backlit LCD; compatible with D, DC, DL, C, D+15, and G devices
Portable design	154 × 82 × 26 mm; approximately 230 g; 3 AAA batteries, 4.5 V
Operating environment	-10 to 40°C; 20% to 85% RH

Standard package

Display unit, D impact device, standard test block, USB cable, small support ring, cleaning brush, and portable carrying case.

Selection considerations

Before use, confirm material type, required hardness scale, workpiece mass and rigidity, surface condition, curvature, and measurement position. Converted values and MPa references should be evaluated against applicable material conversion tables, test standards, and internal quality procedures.

Laizhou Jincheng MHLS-300 combines portable metal hardness testing with structured result retention, making it a practical instrument for organizations that need accessible field measurement and a clearer path from test reading to inspection documentation.