English Product Name
| Brand | Biaozhuo |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | LKY-005 |
| Price | USD 2,380 (FOB Shanghai) |
| Measurement Range | 0–100 mm |
| Repeatability | ±0.05 mm |
| Resolution | 0.01 mm |
| Maximum Permissible Error | ±(0.03 + 0.003L) mm (calibrated against Grade 2 gauge blocks) |
| Compliance | JJG 146–2003 (Chinese National Verification Regulation for Gauge Blocks) |
Overview
The Biaozhuo LKY-005 Computerized Gauge Block Comparator is a precision metrology instrument engineered for comparative measurement of gauge blocks up to 100 mm in length. It operates on the principle of frequency-modulated inductive displacement sensing—where dimensional variation induces a proportional shift in resonant frequency of a high-stability LC oscillator circuit—enabling sub-micrometer-level resolution in controlled laboratory environments. Designed in strict accordance with JJG 146–2003, the system supports both full primary verification (main inspection) and statistical sampling verification (spot checking) of Grade 3 to Grade 5 gauge blocks per ISO 3650 and GB/T 6093. The comparator integrates a rigid cast-iron base, thermally stabilized measurement platform, and dual-positioning kinematic fixtures to minimize Abbe error and thermal drift—critical for maintaining traceability to national standards (e.g., NIM, China National Institute of Metrology). Its architecture prioritizes mechanical stability over speed, making it suitable for calibration laboratories operating under GLP conditions where measurement uncertainty budgets must account for environmental control, sensor linearity, and operator-induced variability.
Key Features
- Frequency-based inductive transducer with digital signal conditioning, delivering 0.01 mm resolution and ≤0.05 mm repeatability across the full 0–100 mm range
- Cast-iron workbench with seven-rib structural reinforcement, minimizing thermal expansion effects and enhancing long-term geometric stability
- Kinematic support cradle with precision-ground V-grooves and adjustable clamping arms—ensuring zero-scratch contact and repeatable center-point alignment during both central height and variation measurements
- Dual independent positioning systems: one for nominal center-height evaluation, another for lateral scanning to determine face parallelism and variation (Δh)
- Optically transparent acrylic thermal shield (≥92% light transmission, low thermal conductivity) that reduces convective air currents and maintains ambient temperature uniformity around the gauge block during measurement cycles
- Unit-switching capability between metric (mm) and imperial (inch) modes—fully integrated into data output templates without recalibration or firmware reset
Sample Compatibility & Compliance
The LKY-005 is validated for use with steel and carbide gauge blocks conforming to ISO 3650:2019 and GB/T 6093–2001, covering nominal lengths from 0.5 mm to 100 mm. It supports Grade 3 (±0.25 µm), Grade 4 (±0.4 µm), and Grade 5 (±0.8 µm) tolerance classes as defined in JJG 146–2003. All measurement protocols—including reference block pairing, temperature compensation (based on calibrated lab ambient readings), and deviation reporting—align with mandatory procedures outlined in the regulation. While not certified to ISO/IEC 17025:2017 out-of-the-box, the system provides audit-ready digital records (timestamped, user-logged, version-controlled) compatible with laboratory quality management systems requiring traceability to CMC (Calibration and Measurement Capability) statements.
Software & Data Management
The proprietary Windows-based software suite (v3.2.1, 64-bit compatible) includes embedded calibration database management, automated pass/fail logic per JJG 146–2003 limits, and dynamic end-of-life alerting when measured deviations exceed 85% of maximum permissible error. Raw sensor data, temperature logs, and operator metadata are stored in encrypted SQLite format with SHA-256 hashing. Export functions generate compliant reports in editable Word (.docx) format—including Primary Inspection Records, Sampling Verification Sheets, Verification Certificates (with optional digital signature fields), and uncertainty budget summaries (k = 2). The software enforces sequential workflow control (no concurrent task execution), prevents unsaved exit via graceful shutdown prompts, and maintains full audit trail of all user actions—including login sessions, parameter modifications, and certificate issuance events.
Applications
This comparator serves as a core verification tool in metrology labs performing in-house calibration of working standards used in mechanical engineering QA/QC, aerospace component inspection, and machine tool setup validation. Typical use cases include: periodic verification of master gauge blocks prior to CNC fixture calibration; acceptance testing of newly purchased grade-specific blocks against supplier certificates; inter-laboratory comparison exercises under CNAS (China National Accreditation Service) frameworks; and educational demonstrations of length metrology principles including Abbe error, thermal expansion correction, and uncertainty propagation in comparative measurement. Its design excludes high-throughput production-floor deployment but excels in environments where measurement integrity, regulatory documentation, and long-term repeatability outweigh cycle-time requirements.
FAQ
Does the LKY-005 comply with international calibration standards such as ISO/IEC 17025?
The instrument itself is not accredited, but its measurement methodology, documentation outputs, and traceability chain fully support compliance with ISO/IEC 17025:2017 Clause 6.4 (Equipment) and Clause 7.7 (Uncertainty of Measurement) when operated within a certified laboratory’s documented procedures.
Can the system be integrated into an existing LIMS or MES environment?
Yes—via configurable CSV/XML export modules and ODBC-compliant database drivers. Custom API integration requires coordination with Biaozhuo’s technical support team for protocol mapping and field validation.
What environmental conditions are required for optimal performance?
Laboratory temperature must be maintained at 20.0 ±0.5 °C with humidity <65% RH; air velocity <0.2 m/s near the workbench; and vibration isolation compliant with ISO 25378 Class 2 recommendations.
Is firmware or software update support available post-purchase?
Biaozhuo provides free minor-version updates (v3.x) for three years from date of shipment. Major version upgrades (v4.x+) require a valid maintenance agreement.
How is traceability to national standards established?
Each unit ships with a factory calibration certificate referencing NIM-traceable Grade 2 gauge blocks. Users must perform initial verification using their own accredited reference standards before first use.
