Shumei KQ-50E Benchtop Ultrasonic Cleaner (Knob-Controlled)

Overview

The Shumei KQ-50E Benchtop Ultrasonic Cleaner (Knob-Controlled) is a compact, mechanically operated ultrasonic cleaning system engineered for routine laboratory and light industrial applications requiring reliable, repeatable removal of particulate contaminants, oils, and residues from delicate components. It operates on the principle of ultrasonic cavitation—where high-frequency sound waves (40 kHz) generate microscopic vacuum bubbles in a liquid medium (typically aqueous or mild solvent-based cleaning solutions), which collapse violently upon contact with submerged surfaces, producing localized micro-jets and shear forces sufficient to dislodge adherent soils without mechanical abrasion. Designed for stability and operational simplicity, the KQ-50E features a rigid 304 stainless steel tank construction, integrated transducer assembly, and analog control architecture optimized for low-power efficiency and thermal consistency. Its 2-liter tank volume supports standard labware including beakers, vials, pipette tips, watch glasses, and small precision parts—making it suitable for QC labs, electronics maintenance, dental instrument reprocessing, and academic teaching environments.

Key Features

• Robust 304 stainless steel tank and housing for corrosion resistance and long-term durability in aqueous cleaning environments.
• Knob-based mechanical interface—no digital display or firmware dependencies—ensuring intuitive operation, minimal failure points, and compatibility with electromagnetic-sensitive settings.
• Optimized transducer coupling and circuit design delivering high electroacoustic conversion efficiency and reduced reactive power loss.
• Dedicated 50 W ultrasonic output at a fixed frequency of 40 kHz—selected for balanced penetration depth and cavitation intensity across common cleaning media (e.g., deionized water, alkaline detergents, isopropanol).
• Adjustable mechanical timer with continuous (ON) mode and discrete 1–60 minute intervals—enabling precise process repeatability without software configuration.
• Integrated stainless steel mesh basket included as standard equipment—providing uniform part suspension and acoustic field distribution while protecting fragile items from direct tank contact.

Sample Compatibility & Compliance

The KQ-50E accommodates a wide range of sample geometries and materials compatible with ultrasonic energy, including glassware (borosilicate, Pyrex), metal tools (stainless steel, titanium), ceramic substrates, and certain polymers (e.g., PTFE, polypropylene). It is not recommended for use with highly porous ceramics, soft aluminum alloys, or bonded assemblies where interfacial delamination may occur under prolonged exposure. While the unit itself does not carry CE, UL, or FDA certification, its design aligns with general laboratory safety practices outlined in ISO 13485 (for medical device cleaning validation support) and ASTM D2603 (Standard Test Method for Sonic Shear Stability of Lubricants). Users performing critical cleaning validation—such as in pharmaceutical pre-cleaning steps—must establish and document their own process parameters (e.g., dwell time, solution temperature, rinse protocol) per internal SOPs and relevant USP or ISO 15883 guidance.

Software & Data Management

The KQ-50E is a standalone analog instrument with no embedded microprocessor, firmware, or data logging capability. Consequently, it requires no software installation, network connectivity, or cybersecurity protocols. This architecture eliminates concerns related to firmware obsolescence, audit trail generation, or 21 CFR Part 11 compliance—making it ideal for GLP/GMP environments where procedural simplicity, traceability via manual logbooks, and regulatory transparency are prioritized over digital automation. All operating parameters—including timer setting and power activation—are directly observable and manually recorded by the user, supporting full traceability during routine maintenance or cleaning validation studies.

Applications

• Routine cleaning of analytical glassware prior to titration, spectroscopy, or chromatography to eliminate organic residue and silicate films.
• Preparation of electron microscopy specimens by removing dust and hydrocarbon contamination from SEM stubs and TEM grids.
• Removal of flux residues and oxidation layers from printed circuit boards (PCBs) and SMT components during R&D prototyping.
• Decontamination of reusable dental handpieces, orthodontic instruments, and endodontic files in accordance with ADA-recommended protocols.
• Supporting ISO 8573-1 compressed air testing by cleaning sampling tubes and orifice plates prior to particle counting analysis.
• Academic instruction in physical chemistry and materials science laboratories for demonstrating cavitation physics and surface energy effects.

FAQ

Does the KQ-50E include heating functionality?
No—the KQ-50E is a non-heating ultrasonic cleaner. It relies on ambient or externally pre-warmed cleaning solutions. For temperature-controlled cleaning, consider models such as the KQ2200E or KQ-100E, which integrate 400 W heating elements and adjustable thermostatic control (room temperature to 80 °C).
Can I use solvents other than water in this unit?
Yes—provided the solvent is compatible with 304 stainless steel and has a flash point above 60 °C. Commonly used alternatives include isopropanol, ethanol, and low-surface-tension aqueous detergents. Flammable solvents (e.g., acetone, hexane) must not be used due to absence of explosion-proof design.
Is the stainless steel mesh basket removable and autoclavable?
Yes—the included mesh basket is fully detachable and rated for repeated autoclaving at 121 °C, 15 psi for up to 30 minutes, supporting sterile processing workflows in microbiology and tissue culture labs.
What is the expected service life of the transducer under normal usage?
With proper maintenance—including regular descaling, avoidance of dry operation, and use of appropriate cleaning solutions—the piezoelectric transducers are rated for ≥5,000 hours of cumulative operational duty cycle.
Does Shumei provide calibration documentation or factory test reports?
As an analog benchtop unit without electronic feedback loops or metrological sensors, the KQ-50E does not require formal calibration. However, Shumei supplies a Certificate of Conformance (CoC) verifying material composition, dimensional compliance, and functional verification at time of shipment.