Kedao SK5210LHC Dual-Frequency Benchtop Ultrasonic Cleaner with Heater

Overview

The Kedao SK5210LHC is a dual-frequency benchtop ultrasonic cleaner engineered for precision cleaning of delicate laboratory components, optical elements, semiconductor wafers, medical instruments, and analytical sample preparation vessels. It operates on the principle of cavitation-induced acoustic energy transfer—where high-frequency sound waves generate transient microbubbles in aqueous or mild solvent media; their implosive collapse delivers localized mechanical shear forces that dislodge particulate contaminants, organic residues, and biofilms without surface abrasion. The dual-frequency capability (35 kHz and 53 kHz) enables application-specific optimization: lower frequency provides higher cavitation intensity suitable for robust particulates and heavier soiling, while the higher frequency delivers finer, more uniform energy distribution ideal for microstructures, MEMS devices, and sensitive substrates. Integrated heating (20–60 °C) enhances detergent efficacy and accelerates contaminant solubilization, while maintaining thermal stability within ±1.5 °C across the operating range.

Key Features

• Dual-frequency operation (35 kHz / 53 kHz) with front-panel toggle selection for process flexibility
• Digitally controlled ultrasonic power output (200 W nominal), adjustable continuously from 40% to 100% in 1% increments for reproducible energy delivery
• Precise temperature regulation via PID-controlled heater (270 W), with real-time display of both setpoint and actual bath temperature
• Programmable digital timer (1–199 minutes) with auto-shutdown and audible alert
• Backlit LCD interface showing simultaneous readouts of frequency mode, power level, temperature, and remaining time
• Automatic dry-run detection and thermal cutoff protection to prevent transducer damage during low-fluid conditions
• Sound-dampening hinged lid compliant with ISO 9241-307 ergonomic and noise emission guidelines (measured ≤55 dB(A) at 1 m)
• 304 stainless steel tank (30 × 24 × 15 cm) with rounded internal corners for uniform acoustic field distribution and ease of cleaning
• Integrated drain valve for safe, residue-free fluid evacuation between cycles
• Power-loss memory function: retains last-used parameters (frequency, power, temperature, time) after interruption

Sample Compatibility & Compliance

The SK5210LHC accommodates a broad spectrum of laboratory samples—including glassware (vials, cuvettes, pipette tips), metal parts (surgical tools, calibration standards), ceramic substrates, and polymer-based microfluidic chips—provided immersion-compatible solvents (e.g., deionized water, isopropanol, aqueous alkaline detergents) are used. Its design adheres to IEC 61000-6-3 (EMC emissions) and IEC 61000-6-2 (immunity) standards. While not certified for sterile processing per ISO 13485 or FDA 21 CFR Part 820, it supports GLP-compliant cleaning validation when integrated into documented SOPs. Heating and timing functions meet ASTM D2297-19 requirements for standardized ultrasonic cleaning procedures in materials testing laboratories.

Software & Data Management

This model operates via embedded firmware with no external PC dependency. All operational parameters are stored in non-volatile memory and retain configuration integrity through power cycling. While the SK5210LHC does not feature USB/RS-232 connectivity or data logging, its deterministic parameter recall ensures procedural repeatability—a prerequisite for audit-ready workflows under ISO/IEC 17025 accreditation. For laboratories requiring electronic recordkeeping, integration with external environmental monitoring systems is achievable via optional analog voltage output modules (sold separately), enabling traceable correlation of cleaning cycle metadata with QC documentation.

Applications

• Cleaning of HPLC autosampler vials, GC inlet liners, and spectrophotometer cells prior to quantitative analysis
• Preparation of TEM/SEM grid substrates and AFM cantilevers to minimize artifact-inducing residues
• Removal of flux residues from PCB assemblies and soldered microelectronics before functional testing
• Routine decontamination of reusable surgical instruments in research animal facilities (non-sterile grade)
• Supporting ASTM E2972-22 protocols for ultrasonic-assisted extraction of particulate matter from filter membranes
• Surface activation of PDMS microchannels prior to plasma bonding or protein immobilization

FAQ

Is the SK5210LHC suitable for cleaning aluminum or soft metals?
Yes—when operated at 53 kHz with low power (≤60%) and non-corrosive aqueous solutions, it minimizes pitting risk. Avoid chloride-containing media and prolonged exposure.
Does the unit support continuous operation beyond 199 minutes?
No—the maximum single-cycle duration is 199 minutes. For extended cleaning, users must initiate sequential cycles manually.
Can the heater be disabled while retaining ultrasonic function?
Yes—temperature control is fully independent; the heater remains inactive unless a setpoint >20 °C is selected.
What maintenance is required for long-term reliability?
Monthly inspection of tank integrity, quarterly verification of transducer coupling (via visual check for delamination), and annual calibration of temperature sensor against NIST-traceable reference.
Is the drain valve compatible with standard laboratory waste collection tubing?
Yes—it features a 1/2-inch NPT female thread, compatible with common silicone or PVC drainage hoses (ID: 8–12 mm).