Shumei KQ-300DV Benchtop Digital Ultrasonic Cleaner

Overview

The Shumei KQ-300DV is a benchtop digital ultrasonic cleaner engineered for precision cleaning, degassing, emulsification, homogenization, extraction, and cell disruption in academic, industrial, and quality control laboratories. It operates on the principle of high-frequency cavitation—generated by piezoelectric transducers bonded to the bottom and/or sides of a 304 stainless steel tank—producing controlled implosions of microscopic bubbles in the cleaning medium. At its nominal frequency of 40 kHz, the KQ-300DV delivers consistent energy distribution across the 13 L working volume, enabling reproducible removal of particulate contaminants, organic residues, and biofilms from delicate substrates including optical components, semiconductor wafers, surgical instruments, glassware, and analytical sample vials. Its integrated heating, programmable power modulation, and real-time parameter monitoring support standardized cleaning protocols compliant with ISO 13485, ASTM D2603 (for ultrasonic cleaning validation), and internal SOPs governing equipment qualification under GLP and GMP frameworks.

Key Features

• Digital microcontroller-based interface with simultaneous real-time display of ultrasonic power (%), bath temperature (°C), fill level (mm), elapsed time (min), and cumulative operating hours (up to 999,999 h)
• Adjustable ultrasonic power output (40–100% in 1% increments) for process optimization across diverse sample types and soil loads
• Precision temperature control (10–80 °C ±1 °C) via a 400 W immersed stainless-steel heating element with PID regulation and overtemperature cutoff
• Programmable timer (1–480 minutes) with auto-shutdown and memory retention of last-used settings
• Integrated vapor recovery system mitigates solvent evaporation and reduces ambient volatile organic compound (VOC) exposure during heated operation
• Electrically actuated water inlet and drain valves enable hands-free fluid management; compatible with deionized water, aqueous detergents, and low-boiling solvents
• Acoustic damping lid with stainless-steel construction minimizes airborne noise (≤55 dB(A) at 1 m) and prevents splash contamination
• Deep-drawn 304 stainless-steel tank (300 × 240 × 180 mm) with passivated interior surface ensures corrosion resistance and long-term dimensional stability
• Overcurrent, overvoltage, low-water-level, and dry-run protection circuits ensure operational safety and equipment longevity

Sample Compatibility & Compliance

The KQ-300DV accommodates a wide range of laboratory components—including pipette tips, HPLC columns, filter housings, microtiter plates, lens assemblies, and metal calibration standards—without risk of surface pitting or etching when operated within validated parameters. Its sealed electrical architecture meets IP20 ingress protection requirements. The unit complies with IEC 61000-6-3 (EMC emission limits) and IEC 61000-6-2 (immunity to electrostatic discharge and fast transients). While not certified to UL/CSA or CE for medical device reprocessing, it supports cleaning validation per AAMI ST79 Annex E and ISO 15883-1 when integrated into documented workflows. Documentation packages include factory calibration records, material certificates for 304 SS, and traceable firmware version logs.

Software & Data Management

The KQ-300DV employs embedded firmware (v3.2+) with non-volatile EEPROM storage for up to 10 user-defined cleaning programs. All operational parameters—including start/stop timestamps, setpoints, and fault codes—are logged locally and accessible via front-panel navigation. Though lacking USB/Ethernet connectivity or remote API, its cumulative runtime counter and parameter memory facilitate preventive maintenance scheduling and audit readiness per FDA 21 CFR Part 11 Annex 11 expectations (when used in conjunction with paper-based or LIMS-integrated procedural controls). Calibration verification intervals are recommended every 12 months or after 1,000 operating hours.

Applications

• Pre-analytical sample preparation: removal of residual proteins and nucleic acids from centrifuge tubes and PCR plates
• Optical component cleaning: elimination of submicron dust and hydrocarbon films from microscope slides and spectrometer cuvettes
• Electronics manufacturing: flux residue removal from PCBs and SMT assemblies prior to AOI inspection
• Pharmaceutical QA/QC: cleaning of dissolution apparatus vessels and tablet friability testers in accordance with USP
• Materials science: dispersion of nanomaterials (e.g., graphene oxide, TiO₂ nanoparticles) in aqueous or organic media
• Biotechnology: gentle lysis of bacterial cultures and tissue homogenates for protein extraction

FAQ

What is the maximum recommended temperature for aqueous cleaning solutions?
The KQ-300DV supports continuous operation at up to 80 °C; however, for aqueous detergent solutions, a maximum of 60 °C is advised to minimize foaming and surfactant degradation.
Can the unit operate without heating enabled?
Yes—the heating function is fully independent of ultrasonic activation and may be disabled while retaining full power and timing control.
Is the plastic basket autoclavable?
No—the polypropylene rack is rated for repeated use at ≤80 °C but is not suitable for steam sterilization; alternative stainless-steel baskets are available as optional accessories.
Does the vapor recovery system require consumables or maintenance?
The condensation chamber is passive and requires only periodic wiping with isopropyl alcohol; no filters, gaskets, or replaceable parts are involved.
How is calibration verified for temperature and timer accuracy?
Temperature accuracy is confirmed using a NIST-traceable RTD probe immersed at tank center; timer accuracy is validated against a calibrated stopwatch per ISO/IEC 17025 guidelines.