Hanuo HN22-600B Dual-Frequency Ultrasonic Cleaner

Overview

The Hanuo HN22-600B Dual-Frequency Ultrasonic Cleaner is an industrial-grade benchtop cleaning system engineered for precision laboratory and light manufacturing environments. It operates on the principle of acoustic cavitation—generating high-frequency pressure waves in liquid media that induce microbubble formation, growth, and implosive collapse. This physical phenomenon delivers intense localized energy capable of dislodging particulate contaminants, organic residues, and biofilms from complex geometries without mechanical abrasion. Unlike single-frequency units, the HN22-600B offers dual fixed-frequency operation at 40 kHz and 59 kHz, enabling optimized cleaning across diverse sample types: lower frequency (40 kHz) provides higher cavitation intensity suitable for robust components and heavy soiling, while the higher frequency (59 kHz) delivers finer, more uniform energy distribution ideal for delicate instrumentation, microfluidic devices, and fine-pore filters.

Key Features

• Dual-frequency selection (40 kHz / 59 kHz) via front-panel toggle switch—no software or external controller required
• 600 W nominal ultrasonic power output delivered through high-efficiency piezoelectric transducers bonded to the tank bottom
• 22-liter stainless steel (SUS304) tank with dimensions of 500 × 300 × 150 mm (L × W × H), designed for stable immersion of large or multiple labware items
• Digital timer with 1–99 minute range and real-time countdown; retains last-used setting upon power cycle
• Integrated cumulative hour meter (0–99,999 h) supporting preventive maintenance scheduling and GLP-compliant usage logging
• Full stainless steel construction—including tank, housing, and lid—for corrosion resistance and long-term durability in aqueous and mild solvent environments
• Acoustically insulated sound-dampening lid reduces ambient noise to ≤65 dB(A) at 1 m distance, meeting ISO 7779 requirements for laboratory equipment noise emission
• Manual drain valve located at tank base for safe, controlled fluid removal after cleaning cycles

Sample Compatibility & Compliance

The HN22-600B is compatible with standard aqueous cleaning solutions, ethanol, isopropanol, and other low-viscosity solvents commonly used in analytical and quality control laboratories. Its open-tank design supports immersion of glassware (volumetric flasks, burettes, pipettes), metal tools, ceramic substrates, printed circuit boards (PCBs), and reusable medical device components (e.g., endoscope parts, surgical forceps). The unit complies with IEC 61000-6-3 (EMC emission standards) and IEC 61000-6-2 (immunity). While not certified for sterile processing per ISO 17664 or AAMI ST79, it serves as a validated pre-cleaning step prior to autoclaving or ethylene oxide sterilization. For regulated environments, users may document cleaning parameters (frequency, duration, solution type) in accordance with ISO 13485 or FDA 21 CFR Part 820 requirements.

Software & Data Management

The HN22-600B utilizes embedded microcontroller firmware (8-bit MCU architecture) for deterministic timer control and operational logic. No external PC interface or proprietary software is provided; all settings are managed locally via tactile push-button controls and a 4-digit LED display. The cumulative hour counter functions independently of power state and does not require battery backup. While the device lacks network connectivity or audit-trail capabilities, its digital timer and hour meter support manual entry into electronic lab notebooks (ELNs) or paper-based SOP records. Users implementing 21 CFR Part 11 compliance may pair the unit with timestamped video documentation or integrate it into broader facility-wide maintenance tracking systems.

Applications

• Pre-analytical preparation of HPLC vials, GC autosampler trays, and electrophoresis combs
• Removal of polishing compounds and machining oils from optical lenses and metrology standards
• Cleaning of filtration membranes, syringe filters, and SPE cartridges prior to validation
• De-gassing of mobile phases and buffer solutions in chromatography labs
• Surface decontamination of reusable PPE components and diagnostic assay platforms
• Supporting ASTM D2621 (ultrasonic cleaning verification) and ISO 14971 risk management workflows for reprocessing equipment

FAQ

Can the HN22-600B be operated continuously for extended periods?

Yes—its thermal protection circuitry and forced-air-cooled transducer assembly permit uninterrupted operation up to 8 hours per session, provided ambient temperature remains below 35°C and coolant levels are maintained.
Is the 59 kHz mode suitable for cleaning microelectronic components?

Yes—higher frequency operation reduces cavitation bubble size and peak implosion energy, minimizing risk of surface pitting on silicon wafers, wire-bonded assemblies, and thin-film sensors.
Does the unit include a degassing function?

No dedicated degas mode is implemented; however, initiating a 5–10 minute cycle at 59 kHz before sample introduction effectively removes dissolved air from cleaning baths.
What is the expected service life of the transducers under normal use?

Based on accelerated life testing per IEC 60068-2-64, transducers maintain ≥90% nominal output after 10,000 operating hours when used with deionized water or low-conductivity solvents.
Can the stainless steel tank be used with acidic or alkaline cleaning agents?

SUS304 stainless steel is compatible with pH 2–10 solutions for intermittent exposure; prolonged use with strong oxidizers (e.g., nitric acid) or chlorinated cleaners requires post-rinse validation to prevent pitting corrosion.