Shumei KQ-500JL Precision Gauge Block Ultrasonic Cleaner

Overview

The Shumei KQ-500JL Precision Gauge Block Ultrasonic Cleaner is an engineered solution for high-fidelity cleaning of precision metrology artifacts—specifically gauge blocks, slip gauges, and other hardened steel or carbide reference standards requiring non-abrasive, particle-free surface preparation. It operates on the principle of cavitation-induced micro-scrubbing at a precisely stabilized ultrasonic frequency of 40 kHz ±1 kHz, optimized to generate controlled implosion energy without inducing surface pitting, micro-scratching, or dimensional alteration in calibrated artifacts. Unlike general-purpose cleaners, the KQ-500JL integrates frequency-specific tuning and dedicated mechanical fixtures—including a stainless-steel gauge block support rack—to maintain part orientation, minimize contact stress, and ensure uniform acoustic field distribution across all surfaces. Its 22.5 L tank volume accommodates standard grade 0 and grade 1 gauge block sets (up to 100 mm length), while the 304 stainless-steel construction ensures long-term corrosion resistance against aqueous cleaning solutions and mild alkaline detergents commonly used in metrology labs.

Key Features

• Microprocessor-controlled operation with digital LED interface for precise parameter setting and real-time monitoring of temperature, time, power, and liquid level.
• Stabilized 40 kHz ultrasonic transduction system featuring high-Q piezoelectric transducers with low resonant impedance and improved electroacoustic conversion efficiency (>92% typical).
• Integrated heating module (800 W) enabling programmable temperature control from ambient to 80 °C, supporting both cold and warm ultrasonic cleaning protocols per ISO 3664 and VDI/VDE 2634 guidelines.
• Comprehensive safety architecture including automatic shutdown upon low liquid level detection, over-temperature, over-voltage, over-current, and dry-run conditions.
• Acoustically damped lid reduces operational noise to <60 dB(A), meeting ISO 7779 requirements for laboratory ambient noise compliance.
• Manual inlet and drain valves allow controlled fluid exchange—critical for minimizing particulate reintroduction during rinse cycles in cleanroom-adjacent environments.
• Self-tuning circuitry with automatic frequency sweep and real-time tracking maintains optimal resonance under varying load and solution viscosity conditions.

Sample Compatibility & Compliance

The KQ-500JL is validated for use with Grade 0, Grade 1, and Grade 2 gauge blocks conforming to ISO 3650 and ANSI B89.1.9. It supports cleaning in deionized water, low-foaming alkaline solutions (pH 9–11), and ethanol-based rinses—compatible with ASTM D1193 Type II water specifications. All wetted parts are constructed from electropolished 304 stainless steel, eliminating leachable metals that could contaminate calibration surfaces. The unit meets CE electromagnetic compatibility (EMC) Directive 2014/30/EU and Low Voltage Directive 2014/35/EU. While not certified to GLP or GMP out-of-the-box, its digital logging capability (time-stamped parameter records) supports audit-ready documentation when integrated into lab quality management systems compliant with ISO/IEC 17025.

Software & Data Management

The KQ-500JL operates via embedded firmware without external PC dependency. All operational parameters—including start time, duration, set temperature, actual temperature, ultrasonic power level, and liquid level status—are retained in non-volatile memory and displayed in real time. Though it lacks USB or Ethernet connectivity, the unit supports manual traceability: users may log settings and cycle outcomes in paper-based or LIMS-integrated electronic batch records. The digital display includes visual indicators for fault conditions (e.g., “LOW” for low level, “OVHT” for over-temperature), facilitating rapid troubleshooting consistent with ISO/IEC 17025 clause 7.7 on equipment malfunction response.

Applications

• Cleaning of gauge blocks prior to interferometric calibration (per ISO 5725 and JIS B 7504).
• Removal of fingerprint residues, hydrocarbon films, and polishing compound traces from precision-ground surfaces.
• Preparation of master artifacts for laser interferometry, coordinate measuring machine (CMM) probe qualification, and optical flat verification.
• Supporting ISO/IEC 17025 accredited laboratories in maintaining artifact integrity across calibration intervals.
• Use in metrology departments of aerospace OEMs, national measurement institutes, and third-party calibration service providers where traceable, repeatable cleaning is required.

FAQ

Is the KQ-500JL suitable for cleaning tungsten carbide or ceramic gauge blocks?
Yes—its 40 kHz frequency and low-cavitation-energy profile are compatible with brittle materials when operated within recommended temperature and time limits (≤60 °C, ≤10 min immersion).
Does the unit support validation documentation for ISO/IEC 17025 audits?
It provides real-time parameter visibility and fault logging; full validation requires user-generated IQ/OQ protocols aligned with internal SOPs and manufacturer specifications.
Can the ultrasonic frequency be manually adjusted?
No—the unit operates at a fixed nominal frequency of 40 kHz with ±1 kHz tolerance; frequency stability is maintained automatically via closed-loop tracking.
What cleaning solutions are recommended for gauge block maintenance?
Deionized water with 1–2% low-foaming alkaline detergent (e.g., Alconox® Liquinox®) or anhydrous ethanol for final rinse—avoid chlorinated or acidic solvents.
Is the tank geometry optimized for uniform energy distribution?
Yes—the 500 × 300 × 150 mm inner dimensions and transducer placement pattern follow ASTM E1595 beam uniformity guidelines for critical cleaning applications.