Zuofei LX-6K/LX-7K/LX-10K Compact Benchtop Centrifuge

Overview

The Zuofei LX-6K, LX-7K, and LX-10K series are compact, benchtop centrifuges engineered for routine microcentrifugation tasks in molecular biology, clinical diagnostics, and quality control laboratories. Designed around a brushless DC motor architecture, these instruments operate on the principle of fixed-angle rotor sedimentation—generating radial acceleration to separate suspended particles (e.g., cellular debris, precipitated nucleic acids, or bacterial pellets) based on density, size, and shape. Unlike high-speed or refrigerated centrifuges, the LX series prioritizes spatial efficiency, rapid start-stop response, and operational simplicity without compromising mechanical stability or reproducibility. Each model delivers precise, repeatable RCF values under defined rotational conditions, making them suitable for applications requiring consistent low-to-moderate g-force separation—particularly where sample volumes range from 0.2 mL to 2.0 mL and turnaround time is critical.

Key Features

• Three-tiered performance configuration: LX-6K (6000 rpm / 2000 × g), LX-7K (7000 rpm / 2300 × g), and LX-10K (10000 rpm / 5000 × g) allow users to select optimal force resolution for specific protocols.
• Lid-activated safety interlock: The centrifuge halts rotation immediately upon lid opening—mechanically enforced with no software delay—ensuring compliance with IEC 61010-1 safety standards for laboratory electrical equipment.
• Integrated fixed-angle rotor system: Pre-balanced, non-detachable rotors minimize setup time and eliminate misalignment risk; compatible with standard 1.5/2.0 mL microcentrifuge tubes and dual 8-position 0.2 mL PCR strip carriers.
• Thermally stable composite lid: Engineered from impact-resistant polymer composites to withstand repeated mechanical stress while maintaining optical opacity and user protection during operation.
• Low-noise, low-vibration operation: Optimized rotor geometry and motor mounting reduce acoustic emission (<55 dB(A)) and floor transmission—ideal for shared lab environments or laminar flow hoods.
• Energy-efficient design: Rated at 30 W (LX-6K) or 40 W (LX-7K/LX-10K), supporting continuous duty cycles without thermal throttling or fan-assisted cooling requirements.

Sample Compatibility & Compliance

The LX series accommodates common microvolume consumables including polypropylene 0.2 mL PCR strips (8-tube format), 0.5 mL, 1.5 mL, and 2.0 mL conical microcentrifuge tubes—compatible with both standard and low-retention variants. Rotors are calibrated for balanced loading (e.g., 8 × 1.5 mL tubes or symmetric 2 × 8-strip configurations); unbalanced loads exceeding ±5% mass differential per rotor half are automatically inhibited via motor current sensing. The devices conform to ISO 13485-aligned manufacturing practices and meet CE marking requirements under Directive 2014/30/EU (EMC) and 2014/35/EU (LVD). While not certified for GLP/GMP production environments, their mechanical reliability and traceable performance make them appropriate for QC release testing in accordance with ASTM D4097 (standard practice for centrifuge verification) and ISO 20776-1 (clinical microbiology procedures).

Software & Data Management

These centrifuges operate as standalone instruments with no embedded firmware-based data logging, remote control, or USB connectivity. All parameter selection—including speed (rpm) and run time (0–99 minutes)—is executed via tactile membrane buttons and an LED display. No software installation or driver dependency is required. As such, they inherently satisfy FDA 21 CFR Part 11 requirements for systems where electronic records are not generated—eliminating validation overhead for regulated labs performing manual, non-auditable centrifugation steps. For laboratories requiring audit trails, integration into LIMS workflows is achieved through external time-stamped procedural documentation rather than instrument-level digital output.

Applications

• Routine pelleting of bacterial cultures (E. coli, Bacillus spp.) prior to lysis or plasmid extraction.
• Clarification of enzymatic reaction mixtures, restriction digests, or ligations prior to electrophoresis.
• Microfiltration support: spin-down of binding buffers in column-based DNA/RNA purification kits (e.g., silica-membrane spin columns).
• PCR setup: brief centrifugation to collect condensate from tube walls and ensure reagent homogeneity before thermal cycling.
• Point-of-care diagnostics: rapid separation of whole blood into serum/plasma fractions using capillary or microvolume collection tubes.
• Educational labs: safe, low-risk introduction to centrifugal force principles and rotor dynamics for undergraduate biotechnology courses.

FAQ

What is the maximum recommended run time for continuous operation?
The LX series supports indefinite runtime up to 99 minutes per cycle; however, for thermal management in ambient temperatures above 25°C, intervals of ≤15 minutes followed by ≥2-minute cooldown are advised to sustain motor longevity.
Can I use this centrifuge with 0.5 mL tubes?
Yes—0.5 mL microtubes are fully supported when placed in designated positions within the 1.5/2.0 mL rotor; ensure symmetrical loading to prevent vibration-induced instability.
Is rotor calibration required before first use?
No—rotors are factory-balanced and permanently mounted; no user calibration or recalibration is necessary throughout service life.
Does the device comply with ISO 15195 for reference measurement systems?
No—this is a Class II general-purpose centrifuge and does not meet the metrological traceability or uncertainty requirements specified in ISO 15195 for reference laboratory instrumentation.
Are spare rotors available for purchase separately?
Yes—Zuofei supplies OEM-compatible replacement rotors (P/N: LX-R8A for 8×1.5/2.0 mL; P/N: LX-R16B for dual 8×0.2 mL PCR strip carriers) with documented dimensional and material certifications.