Olympus LEEB140 Portable Leeb Hardness Tester

Overview

The Olympus LEEB140 Portable Leeb Hardness Tester is an industrial-grade, handheld hardness measurement instrument engineered for field and shop-floor applications where conventional benchtop hardness testers are impractical. It operates on the Leeb rebound principle—measuring the ratio of impact velocity to rebound velocity of a tungsten carbide impact body dropped onto a prepared metal surface under controlled spring force. This non-destructive, single-point dynamic method delivers rapid hardness estimates correlated to standard static scales (HB, HRC, HV, HRB, HS) without requiring surface preparation beyond basic cleaning and minimal roughness control (Ra ≤ 6.3 µm). Designed for metallurgical QA/QC, in-service component inspection, weld verification, and scrap sorting, the LEEB140 meets the metrological requirements of ISO 16859 and ASTM A956 for portable Leeb instruments, ensuring traceable, repeatable results across diverse metallic substrates including steels, cast irons, aluminum alloys, copper, and titanium.

Key Features

• Integrated high-speed thermal printer enables immediate hardcopy output with timestamp, operator ID, sample identification, and hardness value—supporting audit-ready documentation per GLP and ISO 9001 requirements.
• Multi-scale conversion engine compliant with DIN 50156-1 and ASTM E140, providing real-time simultaneous display of Leeb (HL), Brinell (HB), Rockwell B/C (HRB/HRC), Vickers (HV), and Shore (HS) values from a single impact event.
• Ruggedized magnesium alloy housing rated IP54 for dust and water resistance, tested to MIL-STD-810G for shock (1.5 m drop onto concrete) and vibration (10–55 Hz, 1.5 mm amplitude).
• Full Chinese-language graphical LCD with intuitive menu navigation—no external PC or software required for basic operation; supports calibration certificate export via USB interface.
• Onboard statistical functions: mean, standard deviation, max/min, and tolerance band alerting—user-definable pass/fail thresholds trigger visual and audible indicators during sequential measurements.
• Rechargeable lithium-ion battery (7.4 V, 2200 mAh) provides ≥ 8 hours of continuous operation or > 5,000 test cycles per charge; battery status and low-power warning integrated into UI.

Sample Compatibility & Compliance

The LEEB140 is validated for use on homogeneous, non-porous metallic materials with minimum thickness ≥ 10 mm (or ≥ 3× indentation depth) and surface curvature radius ≥ 30 mm. It is unsuitable for thin sheet metal (< 3 mm), plated coatings, case-hardened layers < 0.8 mm deep, or highly elastic polymers. Calibration verification follows ASTM E10 and ISO 6506-3 using certified reference blocks traceable to NIST or PTB. Device firmware complies with IEC 61326-1 for electromagnetic compatibility in industrial environments and supports FDA 21 CFR Part 11–compatible data logging when paired with Olympus-certified PC software (optional).

Software & Data Management

While fully functional as a standalone instrument, the LEEB140 interfaces with Olympus Hardness Manager v3.2 (Windows-based) via micro-USB for advanced reporting, SPC charting, and database archiving. Software enables batch report generation (PDF/CSV), calibration history tracking, user access levels (admin/operator), and electronic signature capture. All printed reports include unique serial number, firmware version, calibration date, and measurement uncertainty estimate per GUM (Guide to the Expression of Uncertainty in Measurement). Audit trails record every parameter change, print command, and calibration event with immutable timestamps.

Applications

• In-field verification of heat-treated components (gears, shafts, turbine blades) prior to installation.
• Weld seam hardness mapping across HAZ (heat-affected zone) to assess post-weld heat treatment efficacy.
• Scrap yard sorting of ferrous/non-ferrous alloys based on hardness correlation to grade (e.g., distinguishing AISI 1045 from 4140 steel).
• Preventive maintenance inspections of rolling mill rolls, crusher jaws, and hydraulic cylinder rods.
• Third-party inspection services requiring ISO/IEC 17025-compliant on-site hardness certification.

FAQ

What standards does the LEEB140 comply with for Leeb hardness testing?
It conforms to ISO 16859:2013 and ASTM A956-22 for portable hardness testers using the Leeb rebound method.
Can the LEEB140 measure hardness on curved surfaces?
Yes—provided the curvature radius exceeds 30 mm; optional convex/concave support feet (sold separately) extend usability down to R10 mm.
Is calibration certificate included with shipment?
Each unit ships with a factory calibration certificate traceable to JCSS (Japan Calibration Service System) and valid for 12 months.
Does the thermal printer require ink or ribbons?
No—it uses dry thermal paper (57 mm width); no consumables other than paper rolls are needed.
How is measurement repeatability ensured on rough or oxidized surfaces?
The device applies automatic surface condition compensation based on impact energy loss analysis; however, ISO 16859 recommends surface grinding to Ra ≤ 3.2 µm for highest accuracy.