Shumei KQ-400VSM Dual-Frequency Low-Noise Ultrasonic Cleaner for Medical & Laboratory Use

Overview

The Shumei KQ-400VSM Dual-Frequency Low-Noise Ultrasonic Cleaner is engineered for precision cleaning of delicate medical instruments, surgical tools, laboratory glassware, and analytical components requiring high-reproducibility decontamination without mechanical abrasion. It operates on the principle of cavitation—generated by two independently selectable ultrasonic frequencies (33 kHz and 40 kHz)—to produce controlled microbubble implosion within the cleaning solution. This dual-frequency capability enables optimized removal of diverse contaminant types: lower frequency (33 kHz) delivers higher-energy cavitation suitable for robust particulate or organic residue removal, while higher frequency (40 kHz) provides finer, more uniform energy distribution ideal for sensitive surfaces such as endoscopes, microfluidic devices, or coated optics. The unit integrates a fully sealed 304 stainless steel tank formed via one-piece deep-drawing, eliminating weld seams that could harbor biofilm or compromise corrosion resistance—critical for compliance with ISO 15883 and AAMI ST35 standards in healthcare reprocessing environments.

Key Features

• True dual-frequency operation (33 kHz / 40 kHz), switchable via intuitive LCD touch interface for application-specific optimization
• 0–100% ultrasonic power adjustment in precise 1% increments, enabling fine-tuned energy delivery to match load sensitivity and soil burden
• Integrated heating system (800 W) with digital temperature control from ambient to 80 °C, supporting enzymatic or alkaline detergent activation per ASTM F1913 protocols
• Extended timer range (0–24 h) with automatic shutdown and audible alert, facilitating unattended batch processing under GLP-aligned workflows
• Acoustically insulated lid and vibration-damped transducer mounting reduce operational noise to <65 dB(A), meeting OSHA-recommended exposure thresholds for continuous lab use
• High-Q piezoelectric transducers with low resonant impedance ensure >92% electroacoustic conversion efficiency and long-term stability under thermal cycling
• Overtemperature and overcurrent protection circuits comply with IEC 61010-1 safety requirements for laboratory electrical equipment

Sample Compatibility & Compliance

The KQ-400VSM accommodates a wide range of reusable medical devices—including laparoscopic trocars, dental handpieces, biopsy forceps, and chromatography vials—as well as standard laboratory ware (e.g., NMR tubes, cuvettes, pipette tips). Its 22.5 L capacity and 500 × 300 × 150 mm tank geometry support immersion of large or multi-tiered loads without compromising acoustic field uniformity. All wetted surfaces are electropolished 304 stainless steel, certified to ASTM A240 and resistant to common cleaning agents (e.g., neutral pH detergents, 0.5% sodium hydroxide, 3% hydrogen peroxide). The system supports validation documentation per ISO 13485 QMS requirements and is compatible with routine IQ/OQ protocols for regulated laboratories operating under FDA 21 CFR Part 820 or EU MDR Annex XIII.

Software & Data Management

While the KQ-400VSM operates via embedded firmware without external PC connectivity, its touch-based HMI logs all critical process parameters—including frequency selection, power setpoint, temperature profile, and elapsed time—for manual audit trail generation. Each cycle can be assigned a user-defined ID; settings are retained after power loss. For facilities requiring electronic records, optional RS-232 output (available upon request) enables integration with LIMS or MES platforms for automated data capture. All parameter changes trigger timestamped event logging, satisfying ALCOA+ principles for data integrity in GMP-compliant environments.

Applications

• Cleaning of stainless steel, titanium, and anodized aluminum surgical instruments prior to sterilization
• Removal of proteinaceous residues from endoscope channels and lumens
• Preparation of HPLC/GC sample vials and autosampler components to eliminate carryover
• Decontamination of electron microscopy grids and TEM specimen holders
• Routine maintenance of viscometers, rheometers, and particle size analyzers’ fluid pathways
• Supporting ASTM D2240 (durometer calibration) and ISO 48-4 (rubber hardness testing) sample preparation

FAQ

Is the KQ-400VSM compliant with international medical device reprocessing standards?
Yes—it meets material, construction, and performance criteria referenced in ISO 15883-1, AAMI ST35, and EN ISO 14937 for washer-disinfectors used in healthcare settings.
Can the unit be validated for routine use in a GMP laboratory?
Absolutely. Its repeatable temperature control, calibrated timer, and stable ultrasonic output enable full IQ/OQ/PQ execution using standard thermocouples, hydrophones, and Alconox® challenge soils.
What cleaning solutions are recommended for use with this system?
Non-foaming, low-residue enzymatic or alkaline formulations compatible with stainless steel and approved for medical device reprocessing—e.g., Tergazyme®, Liquinox®, or generic USP-grade detergents.
Does the system support continuous operation over multiple cycles?
Yes, with mandatory 15-minute cooldown intervals between consecutive 24-hour cycles to maintain transducer longevity and thermal stability.
Is remote monitoring or Ethernet connectivity available?
Standard configuration includes only local HMI control; however, RS-232 or optional Modbus RTU interfaces can be factory-installed for SCADA or LIMS integration.