Brookfield QT15 Benchtop Ultrasonic Cleaner, 1.5L Capacity, 40 kHz

Overview

The Brookfield QT15 is a compact, benchtop ultrasonic cleaner engineered for precision cleaning of delicate and high-value components in research laboratories, quality control environments, and clinical support facilities. It operates on the principle of acoustic cavitation—generating high-frequency pressure waves (40 kHz) that induce microscopic bubble formation and collapse within the cleaning fluid. This transient implosion produces localized micro-jets and shear forces capable of dislodging sub-micron particulates, organic residues, biofilms, and dried-on contaminants from complex geometries—including blind holes, crevices, and micro-textured surfaces—without mechanical abrasion or thermal degradation. Designed for consistent performance under intermittent or extended duty cycles, the QT15 integrates a robust piezoelectric transducer assembly (not ceramic disk elements), eliminating thermal runaway risks associated with low-duty-cycle ceramic resonators. Its sealed 304 stainless steel tank ensures chemical compatibility with aqueous detergents, mild alkaline solutions, and ethanol-based rinses—making it suitable for pre-analytical sample preparation, instrument maintenance, and ISO 13485-aligned medical device reprocessing workflows.

Key Features

• High-reliability piezoelectric transducer array—engineered for continuous operation without thermal fatigue or output drift, unlike standard ceramic plate transducers prone to cracking above 70 °C
• 304 stainless steel seamless tank fabricated via deep-drawn stamping for structural integrity, corrosion resistance, and ease of decontamination
• Anodized aluminum housing with anti-corrosive coating—provides electromagnetic shielding, mechanical durability, and compliance with laboratory environmental standards
• Precision 0–30 minute electromechanical timer with audible end-of-cycle alert—enabling repeatable exposure protocols aligned with ASTM F2799 (Standard Guide for Ultrasonic Cleaning Validation)
• Integrated stainless steel lid included as standard—reduces airborne aerosol generation and acoustic emissions to meet OSHA 29 CFR 1910.95 noise exposure guidelines (<75 dBA at 1 m)
• Critical electronic components sourced from Fairchild Semiconductor (now ON Semiconductor)—ensuring stable power regulation, surge immunity, and long-term mean time between failures (MTBF > 50,000 hrs)

Sample Compatibility & Compliance

The QT15 accommodates a broad range of substrates requiring non-destructive surface decontamination: optical lenses, sapphire watch crystals, stainless steel surgical instruments, titanium dental implants, MEMS sensors, printed circuit boards (PCBs), inkjet printheads, and polymer-based consumables (e.g., feeding tubes, nebulizer parts). Its 1.5 L capacity supports batch processing of up to 12 standard 10 mL vials or six 15 mm diameter watch movements simultaneously. The unit complies with IEC 61010-1 (Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use) and carries CE marking per Directive 2014/30/EU (EMC) and 2011/65/EU (RoHS). While not classified as a Class II medical device under FDA 21 CFR Part 820, its design facilitates validation per AAMI ST34 and ISO 15883-1 for washer-disinfectors when used in conjunction with documented cleaning chemistries and process parameters.

Software & Data Management

The QT15 is a stand-alone analog-controlled instrument with no embedded firmware, network interface, or digital data logging capability—intentionally designed to minimize validation burden in regulated environments. All operational parameters (timer setting, power delivery, frequency stability) are hardware-defined and traceable via factory calibration records. For laboratories operating under GLP or GMP frameworks, the absence of software eliminates requirements for 21 CFR Part 11 compliance, audit trails, or electronic signature validation. Process consistency is maintained through fixed-frequency operation (40 kHz ±1%), calibrated timer accuracy (±2% over full range), and thermal cut-off protection preventing sustained operation above 70 °C—supporting reproducible cleaning efficacy across shifts and operators.

Applications

• Pre-ICP-MS sample introduction system cleaning to prevent cross-contamination of trace metal analysis
• Removal of flux residues and solder paste from PCB assemblies prior to AOI inspection
• Routine maintenance of HPLC autosampler needles, syringe filters, and column frits
• Decontamination of reusable ophthalmic trial lenses and otoscope specula in optometry clinics
• Restoration of antique coins, archival photographic negatives, and museum-grade jewelry prior to digitization
• Pre-sterilization cleaning of laparoscopic trocars and arthroscopic shavers in central sterile supply departments

FAQ

Is the QT15 suitable for cleaning heat-sensitive polymers such as polycarbonate or PMMA?
Yes—provided aqueous cleaning solutions remain below 70 °C and exposure duration is limited to ≤10 minutes. Prolonged cavitation at elevated temperatures may induce surface crazing in amorphous thermoplastics.
Can I use organic solvents like acetone or chloroform in the tank?
No—this unit is rated exclusively for water-based or alcohol-miscible aqueous solutions. Flammable or halogenated solvents pose fire, explosion, and transducer delamination hazards.
Does the unit include a heater?
The base QT15 model does not incorporate heating; the QTR15 variant adds a thermostatically controlled immersion heater (range: ambient to 60 °C, ±2 °C accuracy).
What maintenance is required to ensure long-term transducer performance?
Routine cleaning of the tank interior with 10% citric acid solution every 200 operating hours prevents mineral scale buildup that attenuates acoustic coupling efficiency.
Is technical documentation available for IQ/OQ protocol development?
Yes—Brookfield provides a Factory Calibration Certificate, Electrical Safety Test Report (IEC 61010-1), and a Validation Support Package including test methods for frequency verification, timer accuracy, and acoustic power density mapping.