Shumei KQ-500DE Benchtop Digital Ultrasonic Cleaner, 22.5 L Capacity

Overview

The Shumei KQ-500DE is a benchtop digital ultrasonic cleaner engineered for reproducible, high-efficiency cleaning of precision components, laboratory glassware, optical elements, and small-scale industrial parts. It operates on the principle of ultrasonic cavitation—where high-frequency mechanical vibrations (40 kHz) generate microscopic implosive bubbles in a liquid medium, producing localized shockwaves and microstreaming that dislodge particulate contaminants, organic residues, and biofilms from surfaces without mechanical abrasion. Designed for routine use in analytical laboratories, QC/QA facilities, electronics manufacturing support labs, and research environments, the KQ-500DE delivers consistent energy delivery across its 22.5 L stainless steel tank, supporting both aqueous and mild solvent-based cleaning protocols.

Key Features

• Microprocessor-controlled digital interface with simultaneous real-time display of ultrasonic power (%), elapsed/remaining time (min), set/actual temperature (°C), and liquid level status.
• 304 stainless steel tank and transducer housing ensure long-term corrosion resistance and compatibility with common cleaning solutions including alkaline detergents, ethanol/water mixtures, and low-concentration acidic rinses.
• Adjustable ultrasonic power output (40–100% of 500 W nominal) enables optimization for delicate substrates (e.g., MEMS devices or coated optics) or robust particulate removal (e.g., metal shavings or solder flux).
• Programmable heating system maintains precise bath temperatures between ambient and 80 °C, facilitating enhanced solubilization of waxes, greases, and thermally labile organics while remaining compatible with standard plastic baskets and silicone fixtures.
• Integrated frequency-sweeping circuitry minimizes standing wave formation and hot-spotting, improving spatial uniformity of cavitation intensity across the entire tank volume.
• Comprehensive safety architecture includes automatic shutdown triggers for over-temperature, over-voltage, over-current, low water level, and dry-run conditions—fully logged in non-volatile memory for traceability.
• Acoustically damped hinged lid reduces ambient noise and prevents solvent evaporation during extended cycles; manual inlet and drain valves allow controlled fluid exchange without disassembly.

Sample Compatibility & Compliance

The KQ-500DE accommodates a wide range of sample geometries via standard 304 stainless steel baskets (optional accessories), accommodating items up to 300 × 150 × 120 mm (L × W × H). Compatible with ASTM D2606 (standard practice for ultrasonic cleaning of metal parts), ISO 13485-aligned maintenance logs, and GLP-compliant documentation workflows when paired with external audit trails. While not certified for sterile processing per ISO 17664 or EN 13060, it meets general-purpose cleaning validation requirements for pre-sterilization preparation in non-critical device manufacturing and analytical sample prep. No FDA 21 CFR Part 11 compliance is claimed for onboard controls; however, external data logging systems may be integrated via RS-232 or analog output interfaces (available on request).

Software & Data Management

The unit operates via embedded firmware without external PC dependency. All operational parameters—including start time, duration, power setting, target temperature, and fault event timestamps—are retained in internal EEPROM memory for post-cycle review. Optional RS-232 serial communication supports remote parameter configuration and event log export to laboratory information management systems (LIMS) or electronic lab notebooks (ELN). Audit-ready operation requires manual recording of batch IDs, solution lot numbers, and cycle verification checks per internal SOPs; no built-in electronic signature or user-role access control is provided.

Applications

• Routine decontamination of volumetric flasks, pipettes, crucibles, and HPLC sample vials prior to calibration or analysis.
• Removal of polishing compounds and surface oxides from metal calibration standards and reference artifacts.
• Cleaning of printed circuit boards (PCBs), semiconductor wafer carriers, and microfluidic chips prior to metrology or bonding steps.
• Preparation of TEM grids, AFM tips, and optical lenses requiring sub-micron particle-free surfaces.
• Supporting ASTM E1297 and ISO 14644-1 cleanroom component qualification through repeatable, documented cleaning cycles.
• Extraction assistance in solid-phase sample prep workflows, including residual pesticide removal from botanical matrices.

FAQ

What is the maximum recommended operating temperature for aqueous solutions in the KQ-500DE?
The heater is rated for continuous operation up to 80 °C; however, sustained use above 60 °C with water-based solutions may accelerate tank corrosion and reduce transducer lifespan. For prolonged high-temperature cycles, deionized water or inhibited coolants are advised.
Can the KQ-500DE be used with flammable solvents such as acetone or IPA?
No. The unit lacks explosion-proof certification, intrinsically safe circuitry, or vapor containment features. Only non-flammable, low-volatility cleaning media compliant with IEC 61000-6-3 EMC guidelines should be employed.
Is the ultrasonic frequency fixed at 40 kHz, or does it vary during operation?
The nominal center frequency is 40 kHz, but the auto-sweep function continuously modulates ±1.5 kHz around this value to prevent node formation and ensure uniform energy distribution throughout the bath volume.
How often should the transducers be inspected for performance drift?
Under normal usage (≤4 hrs/day), baseline performance verification—measuring cleaning rate using standardized aluminum foil erosion test per ASTM D2606—is recommended every 6 months or after 500 operating hours.
Does the unit include a degassing mode?
Yes. A dedicated 3-minute degas cycle removes dissolved air from fresh solutions prior to initiating cleaning, significantly improving cavitation efficiency and reducing initial bubble interference.