Olympus T-U2 Portable Ultrasonic Contact Impedance Hardness Tester
| Brand | Olympus |
|---|---|
| Origin | Japan |
| Model | T-U2 |
| Measurement Principle | Ultrasonic Contact Impedance (UCI) |
| Portability | Handheld, Battery-Powered |
| Compliance | ASTM A1038, ISO 17643, DIN 50159-2 |
| Hardness Scales | HV, HB, HRC, HRB (converted) |
| Indentation Load | 10 N (standard), optional 3 N / 5 N / 20 N |
| Probe Frequency | 98 MHz |
| Resolution | 1 HV |
| Repeatability | ±1.5 HV (under controlled conditions) |
| Operating Temperature | 0–40 °C |
| Battery Life | ≥12 hours (Li-ion, rechargeable) |
| Data Storage | Internal memory for ≥2,000 readings |
| Interface | USB-C, Bluetooth 5.0 |
Overview
The Olympus T-U2 is a handheld ultrasonic contact impedance (UCI) hardness tester engineered for precision, portability, and non-destructive evaluation of metallic and ceramic materials in field, workshop, and quality control environments. Unlike conventional indentation methods (e.g., Vickers or Rockwell), the T-U2 operates on the UCI principle: a diamond-tipped probe vibrates at a resonant frequency (98 MHz) under a precisely controlled static load (10 N standard). Upon contact with the test surface, the mechanical impedance of the material alters the probe’s resonance frequency. This shift is quantitatively correlated to hardness via calibrated algorithms traceable to national metrology institutes. The method requires no surface preparation—measurements are valid on as-received castings, machined gears, thin-walled tubing (≥1 mm thickness), electroplated layers (>25 µm), curved surfaces (R ≥ 3 mm), and heat-treated components where traditional testers fail due to geometry or accessibility constraints.
Key Features
- True portable architecture: Weighing under 1.2 kg with integrated Li-ion battery supporting ≥12 hours of continuous operation and rapid USB-C charging.
- Multi-scale hardness conversion: Direct readout in HV, HB, HRC, and HRB, with user-selectable calibration curves per material group (steel, stainless, aluminum, titanium, carbides).
- Load-flexible probe system: Interchangeable spring-loaded probes for 3 N, 5 N, 10 N, and 20 N loads—enabling optimized testing of soft coatings, hardened surfaces, and brittle substrates without cracking or pile-up.
- High-resolution measurement: 1 HV resolution with repeatability ≤±1.5 HV (per ASTM A1038 Annex A1, verified on certified reference blocks).
- Ruggedized industrial design: IP54-rated enclosure, shock-absorbing elastomer housing, and sapphire window protecting the probe tip from accidental impact.
- Real-time statistical analysis: On-device calculation of mean, standard deviation, min/max, and histogram distribution across user-defined batches.
Sample Compatibility & Compliance
The T-U2 is validated for use on ferrous and non-ferrous metals, sintered carbides, and structural ceramics. It meets the technical requirements of ASTM A1038–22 “Standard Test Method for Ultrasonic Contact Impedance Hardness Testing” and ISO 17643:2015 “Non-destructive testing — Ultrasonic hardness testing — Method for metallic materials.” Its measurement uncertainty profile aligns with ISO/IEC 17025:2017 for hardness testing laboratories. For regulated industries, the instrument supports GLP-compliant data integrity through timestamped, operator-ID-tagged records and audit-trail-enabled firmware (optional upgrade for FDA 21 CFR Part 11 compliance).
Software & Data Management
Olympus’ dedicated T-U2 PC software (Windows/macOS) enables full traceability: raw frequency shift data, load history, environmental logs (temperature/humidity), and image-captured test locations (via optional camera module). Export formats include CSV, PDF reports (with company logo, QA stamp, and signature fields), and XML for LIMS integration. Bluetooth 5.0 facilitates wireless synchronization with mobile QA apps and enterprise MES platforms. All stored measurements retain full metrological metadata required for ISO 9001 internal audits and third-party accreditation reviews.
Applications
- On-site verification of case depth and surface hardening uniformity in automotive transmission gears and camshafts.
- In-process monitoring of electroless nickel plating hardness on aerospace aluminum substrates (ASTM B733).
- Quality acceptance testing of welded joints in pipeline construction where Brinell testing is impractical.
- Hardness mapping of turbine blade root sections with complex 3D contours.
- Receiving inspection of cold-drawn stainless steel tubes (ASTM A269) without sectioning.
- Research-grade correlation studies between UCI hardness and tensile yield strength in additively manufactured alloys.
FAQ
What standards does the T-U2 comply with for hardness testing?
ASTM A1038–22, ISO 17643:2015, and DIN 50159-2. Calibration certificates are issued against NIST-traceable reference blocks.
Can the T-U2 measure hardness on curved or rough surfaces?
Yes—valid down to radius of curvature R ≥ 3 mm and surface roughness Ra ≤ 6.3 µm. Optional curvature compensation algorithms are available for radii < 10 mm.
Is operator training required for ISO/IEC 17025 compliance?
Yes. Olympus provides certified training modules covering measurement uncertainty estimation, probe maintenance, and GUM-based reporting per ISO/IEC 17025 Clause 7.8.
How is data integrity ensured during export to QA systems?
All exported files contain embedded digital signatures, hash-verified metadata, and immutable timestamps synchronized to UTC via NTP upon connection.
Does the T-U2 support third-party calibration services?
Yes—authorized service centers worldwide perform accredited recalibration per ISO/IEC 17025, including probe resonance verification and load cell traceability to national standards.
