Drick DRK-Mini-7L Benchtop Microcentrifuge for微量 Filtration, Cell Separation, and Rapid Pellet Collection
| Brand | Drick |
|---|---|
| Origin | Shandong, China |
| Manufacturer Type | Direct Manufacturer |
| Regional Classification | Domestic (China) |
| Model | DRK-Mini-7L |
| Instrument Type | Palm-Sized Centrifuge |
| Speed Range | 0–7,000 rpm |
| Max. RCF | 3,800 × g (calculated at 7,000 rpm with 70 mm rotor radius) |
| Dimensions (W×D×H) | 194 × 229 × 120 mm |
| Power Supply | AC 100–240 V, 50/60 Hz |
| Weight | 2.8 kg |
| Rotor Capacity | 7 × 0.2–2.0 mL microtubes (standard PCR tubes, Eppendorf-style) |
| Noise Level | ≤55 dB(A) |
| Safety | Lid interlock, automatic rotor recognition (mechanical), over-speed protection |
| Compliance | CE marked, IEC 61010-1:2010, GB/T 18268.1–2010 |
Overview
The Drick DRK-Mini-7L is a compact, high-reliability benchtop microcentrifuge engineered for routine low-speed separation tasks in resource-constrained or space-limited laboratory environments. Operating on the principle of centrifugal sedimentation—where differential density and particle size drive phase separation under controlled rotational force—the DRK-Mini-7L delivers precise, repeatable acceleration profiles up to 3,800 × g. Its design targets applications requiring gentle yet effective pelleting of biological macromolecules, intact cells, or particulate suspensions without inducing shear-induced lysis or denaturation. Unlike high-speed or ultracentrifuges, the DRK-Mini-7L prioritizes operational simplicity, thermal stability, and mechanical robustness over ultra-high g-force generation—making it ideal for QC labs, teaching facilities, field-deployable units, and point-of-care preparation workflows.
Key Features
- Compact footprint (194 × 229 × 120 mm) enables placement directly on biosafety cabinets, laminar flow hoods, or crowded benchtops without compromising accessibility.
- Brushless DC motor ensures consistent torque delivery across the full speed range (0–7,000 rpm), minimizing vibration and extending service life beyond 20,000 hours MTBF.
- Mechanically interlocked lid prevents operation unless fully closed and secured, satisfying IEC 61010-1 safety requirements for Class II equipment.
- No external refrigeration system required; optimized aluminum rotor housing provides passive thermal dissipation, maintaining sample temperature rise <3°C after 10 min continuous operation at max speed.
- Integrated rotor identification mechanism verifies correct tube configuration prior to spin initiation, reducing risk of imbalance-related failure.
- Programmable timer (10 s – 99 min) with auto-brake function and soft deceleration profile minimizes resuspension of sensitive pellets during stop phase.
Sample Compatibility & Compliance
The DRK-Mini-7L accommodates standard conical-bottom microcentrifuge tubes (0.2 mL, 0.5 mL, 1.5 mL, and 2.0 mL), including PCR strips and individual tubes compatible with most downstream nucleic acid extraction kits and ELISA plate readers. It supports common buffer systems (PBS, Tris-HCl, sucrose gradients) and non-corrosive organic solvents (e.g., ethanol, isopropanol) used in precipitation protocols. The device complies with electromagnetic compatibility (EMC) standards per EN 61326-1:2013 and meets essential health and safety requirements under Directive 2014/30/EU (EMC) and 2014/35/EU (LVD). While not designed for GLP/GMP-certified production environments, its performance traceability (via printed speed/time logs on optional thermal printer interface) supports audit-ready documentation in ISO/IEC 17025-accredited testing laboratories.
Software & Data Management
The DRK-Mini-7L operates via an embedded tactile keypad with LED status indicators—no external PC connection or proprietary software is required for basic operation. For integration into automated lab workflows, an RS-232 serial port (optional) enables bidirectional communication with LIMS or ELN platforms using ASCII-based command protocol. All run parameters—including actual achieved rpm, elapsed time, and error codes—are stored in non-volatile memory for up to 500 cycles and can be exported via USB-C interface (firmware v2.1+). Audit trail functionality meets minimum FDA 21 CFR Part 11 requirements when paired with user-authenticated access control on host systems.
Applications
- Rapid clarification of cell lysates prior to SDS-PAGE or Western blotting
- Microfiltration of viscous samples (e.g., plant extracts, fermentation broths) through 0.22 µm PVDF membranes mounted in spin columns
- Cell pellet collection from suspension cultures (e.g., HEK293T, CHO-K1) at sub-lytic g-forces
- Concentration of exosomes or virus particles from conditioned media using polyethylene glycol (PEG)-based precipitation followed by low-speed pelleting
- Removal of insoluble aggregates from antibody solutions prior to HPLC injection
- Field-deployable nucleic acid purification support in mobile diagnostic vans or remote research stations
FAQ
What is the maximum relative centrifugal force (RCF) achievable with the DRK-Mini-7L?
The DRK-Mini-7L achieves a maximum RCF of 3,800 × g when operating at 7,000 rpm with a standard 7-position rotor and 70 mm radius.
Can this centrifuge accommodate 0.2 mL PCR tubes?
Yes—it accepts all standard conical-bottom microtubes from 0.2 mL to 2.0 mL, including single-strip and individual PCR tubes with snap-cap or hinge-lid designs.
Is rotor calibration required before use?
No. The rotor is factory-balanced and mechanically indexed; no user calibration is necessary. However, visual inspection for cracks or deformation is recommended before each use.
Does the unit support continuous operation mode?
Yes—timer can be set to “∞” for indefinite runtime, with thermal cutoff activating if internal temperature exceeds safe thresholds.
What maintenance schedule is recommended?
Wipe exterior with 70% ethanol weekly; clean rotor chamber with lint-free cloth monthly; inspect O-rings and lid latch biannually. No lubrication or bearing replacement is required within first 5 years under normal usage.
