Shumei KQ-250DE Benchtop Digital Ultrasonic Cleaner
| Brand | Shumei |
|---|---|
| Origin | Jiangsu, China |
| Manufacturer Type | Direct Manufacturer |
| Product Category | Domestic |
| Model | KQ-250DE |
| Instrument Type | General-Purpose |
| Capacity | 10 L |
| Ultrasonic Frequency | 40 kHz |
| Ultrasonic Power Output | 250 W |
| Power Adjustment Range | 40–100% |
| Temperature Control Range | 10–80 °C |
| Timer Range | 1–480 min |
| Sound-Dampening Lid | Included |
| Drain/Inlet | Manual Valve |
Overview
The Shumei KQ-250DE is a benchtop digital ultrasonic cleaner engineered for precision cleaning of delicate laboratory components, analytical instrumentation parts, optical elements, semiconductor wafers, and medical devices. It operates on the principle of high-frequency cavitation—generated by piezoelectric transducers bonded to the stainless steel tank bottom—at a fixed frequency of 40 kHz. This frequency delivers optimal energy transfer for micron-scale particle removal without compromising substrate integrity. The unit integrates microprocessor-based control logic to coordinate ultrasonic output, heating, timing, and safety monitoring in a unified operational interface. Designed for routine use in QC laboratories, research facilities, and maintenance workshops, the KQ-250DE complies with general-purpose cleaning requirements under ISO 13485-aligned workflows and supports GLP documentation practices through deterministic parameter logging.
Key Features
- Microcontroller-driven digital interface with real-time display of set and actual values for temperature, ultrasonic power (%), elapsed time, and liquid level.
- 304 stainless steel tank (300 × 240 × 150 mm internal dimensions) and housing ensure corrosion resistance and long-term structural stability in aqueous and mild solvent environments.
- Adjustable ultrasonic power output (40–100% of 250 W nominal), enabling optimization for sensitive substrates or heavily soiled samples.
- Independent temperature regulation from 10 °C to 80 °C (±2 °C accuracy), supported by a 400 W heating element and PID-controlled feedback loop.
- Programmable timer with 1–480 minute range, allowing unattended operation for extended cleaning cycles required in residue validation studies.
- Integrated safety protections: low-level fluid detection, over-temperature cutoff, over-current monitoring, and automatic shutdown upon lid opening or abnormal voltage conditions.
- Included accessories: sound-dampening lid (reducing ambient noise to <55 dB(A)), stainless steel mesh basket, support rack, and manual inlet/drain valves.
Sample Compatibility & Compliance
The KQ-250DE accommodates a broad range of sample geometries and materials—including glassware (vials, cuvettes, pipette tips), metal components (syringe needles, filters, flow cells), ceramic substrates, and polymer-based fixtures—provided they are compatible with aqueous or low-volatility solvent systems. Its 10 L capacity supports batch processing of multiple small-to-medium items simultaneously. While not certified to UL/CSA or IEC 61010-1 as a standalone medical device, the unit meets general electrical safety expectations for Class I laboratory equipment used in non-critical disinfection contexts. It supports adherence to ASTM D2297 (adhesive surface preparation) and USP (cleaning validation guidance) when integrated into validated cleaning protocols.
Software & Data Management
This model does not include PC connectivity or proprietary software; all operations are managed via front-panel membrane buttons and a 4-digit LED display. Parameter settings—including time, temperature, and power level—are retained in non-volatile memory after power cycling. The system logs no audit trail or timestamped event history, and therefore is not compliant with FDA 21 CFR Part 11 for electronic records. However, its deterministic behavior, repeatable setpoints, and visual status indicators (e.g., “LOW LEVEL”, “OVER TEMP”) facilitate manual logbook entries consistent with GLP documentation standards.
Applications
- Routine cleaning of HPLC columns, GC injectors, and spectrophotometer sample holders prior to calibration or analysis.
- Removal of organic residues, polishing compounds, and particulate contaminants from precision optics and MEMS components.
- Preparation of sampling tools (forceps, tweezers, spatulas) in microbiology and cell culture labs.
- Supporting ASTM E2971 (ultrasonic cleaning verification) through controlled, reproducible cycle parameters.
- Decontamination of reusable surgical instruments in low-risk clinical maintenance settings (when paired with appropriate enzymatic or alkaline solutions).
FAQ
What is the tank’s internal volume and material specification?
The ultrasonic tank has an internal capacity of 10 liters and is constructed from AISI 304 stainless steel with a minimum thickness of 1.2 mm.
Is the unit suitable for use with flammable solvents?
No. The KQ-250DE lacks explosion-proof certification and must only be operated with water-based or non-volatile aqueous solutions.
Does it support continuous operation beyond 480 minutes?
No. The maximum programmable duration is 480 minutes; extended cycles require manual reset.
Can the heater and ultrasonics operate simultaneously?
Yes. Both functions are independently controllable and may run concurrently during a single cleaning sequence.
What is the warranty coverage and service support structure?
Shumei provides a standard 12-month limited warranty covering manufacturing defects; technical support is available via email and documented troubleshooting guides.
