Surge Scientific · CF221 · High-Speed Micro Centrifuge
High-Speed Micro Centrifuge — 15,000 RPM · 21,300 × g · 24-Tube Rotor Included
Nucleic Acid Isolation · Protein Pelleting · PCR Strip Prep · Cell Separation · 24 × 1.5/2.0 mL · 12 × 5 mL · 32 × 0.2 mL PCR Tubes
The gap between a good molecular biology result and a great one often comes down to centrifuge throughput and g-force consistency. The CF221 reaches 21,300 × g with 24 tubes loaded, switches between three rotor formats without compromise, and fits the benchtop footprint of an instrument half its capability — all without a single brush to replace.
Why 21,300 × g and 24-Tube Capacity Changes Your Workflow
Most laboratory microcentrifuges are purchased to handle 12 tubes at up to 15,100 × g and the workflow is built around that constraint — halved batch sizes, extra centrifuge runs, and the constant friction of a single-format rotor that can't spin PCR strips without a separate instrument. When sample backlogs grow, labs double up on centrifuges rather than buying one that handles the volume from the start.
The CF221 doubles the standard rotor capacity to 24 × 1.5/2.0 mL tubes, pairs it with a 21,300 × g maximum — the g-force required for tight nucleic acid pellets, membrane fractions, and subcellular organelle separations — and backs the entire instrument with a TFT touchscreen that accepts speed in RPM or RCF directly. The motor-driven double-lock lid closes with light pressure and opens automatically at run completion. Three rotor formats, one centrifuge, no compromises on throughput or force.
21,300 × g — Research-Grade Separation Force
Maximum RCF of 21,300 × g at 15,000 RPM delivers the centrifugal force needed for the most demanding molecular biology applications: DNA/RNA precipitation, tight bacterial pellets, membrane vesicle isolation, and subcellular fractionation. Speed input accepts RPM or RCF directly — no conversion table required, no protocol transcription errors.
24-Tube Rotor — Double the Standard Batch Size
The included 24 × 1.5/2.0 mL fixed-angle rotor with aerosol-tight biosafety lid processes twice the tubes per run compared to standard 12-position microcentrifuges. The fully enclosed steel rotor chamber contains any aerosol release, and the aluminum alloy rotor is autoclavable for sterile workflows.
TFT Touchscreen · 9 Programs · Motor-Driven Lid Lock
A large TFT color touchscreen with intuitive interface replaces the knob-and-button panels found on older high-speed instruments. Nine user-programmable protocols store complete speed/time/RCF combinations for instant method recall. The motor-driven double-lock lid engages with light finger pressure — no forcing, no hand fatigue across a full day of rapid spins.
Silent Brushless DC Motor — Maintenance-Free Design
The brushless DC motor runs quietly throughout the instrument's service life without the progressive vibration and noise increase that characterizes brushed motor wear. No brush replacement schedule, no service interruptions, no bearing noise from worn commutators. Silent operation makes the CF221 a practical choice for open-plan labs and shared instrument rooms.
Three rotors. One centrifuge. Zero compromises on format flexibility. The CF221 accepts 24 × 1.5/2.0 mL tubes with its included rotor, switches to 12 × 5 mL for larger-volume protocols, and accommodates 8 × 4 × 0.2 mL PCR strips — 32 PCR tubes per run — eliminating the secondary centrifuge that most molecular labs maintain just for thermocycler pre-spin work.
Key Features
- Speed range: 100–15,000 RPM, 100 RPM increments
- Maximum RCF: 21,300 × g at 15,000 RPM
- Standard rotor: 24 × 1.5/2.0 mL — double standard capacity
- Optional rotor: 12 × 5 mL conical tubes
- Optional rotor: 8 × 4 × 0.2 mL PCR strips (32 tubes)
- Speed input: RPM or RCF — direct entry toggle
- Large TFT color touchscreen with intuitive interface
- 9 user-programmable speed/time protocols
- Timed mode · Continuous mode · PULSE quick-spin
- Motor-driven double-lock lid — light pressure closure
- Automatic lid release at run completion
- Aerosol-tight biosafety containment lid on standard rotor
- Fully enclosed steel rotor chamber — explosion-proof design
- Aluminum alloy rotor — autoclavable for sterile workflows
- Brushless DC motor — maintenance-free, silent operation
- Air flow design prevents sample heating during high-speed runs
- Overspeed protection with automatic shutdown
- Imbalance detection with audible alarm
- System protection and lid-locking protection
- Over-temperature protection built in
- Color-coded status indicator light bar
- Universal voltage: 110–240 V, 50–60 Hz
- Two-year all-inclusive manufacturer's warranty
- In stock — ships from New Jersey warehouse
21,300 × g
Maximum RCF
Sufficient force for nucleic acid precipitation, membrane fractions, and subcellular organelle separation
24 Tubes
Standard Rotor
Double the batch size of a 12-position microcentrifuge — fewer runs, higher throughput per hour
15,000 RPM
Maximum Speed
Full research-grade speed with fast acceleration and deceleration cycles for rapid protocol completion
Rotor Configurations
24 × 1.5/2.0 mL
Standard microcentrifuge tubes. Fixed-angle aluminum alloy rotor with aerosol-tight biosafety lid. DNA/RNA isolation, protein pelleting, cell separation, general molecular biology.
12 × 5 mL
Larger-volume conical tubes. Cell harvesting from suspension culture, precipitation of larger sample volumes, nucleic acid ethanol precipitation at scale.
8 × 4 × 0.2 mL PCR Strips
32 × 0.2 mL PCR tubes or 4 × 8-strip sets. Pre-thermocycler spin-down, library prep consolidation, and post-amplification processing without a secondary instrument.
Ideal Applications
Molecular Biology & Genomics
DNA and RNA isolation, nucleic acid precipitation, column-based extraction spin-downs, NGS library preparation, and PCR pre-spin. The 21,300 × g force ensures tight, clean pellets from low-copy samples.
Biochemistry & Protein Research
Protein pelleting, lysate clarification, membrane fraction preparation, subcellular organelle isolation, and immunoprecipitation washes. High g-force with precise RPM/RCF control matches demanding protocol specifications.
Clinical & Microbiological Research
Bacterial pellet formation, clinical sample preparation, cell and bacteria separation, urine and serum clarification — in a biosafety-compliant rotor chamber designed for contained aerosol handling.
What's in the Box
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | CF221 |
| Speed Range | 100–15,000 RPM (increment: 100 RPM) |
| Maximum RCF | 21,300 × g at 15,000 RPM |
| Speed Input Mode | RPM or RCF (direct entry toggle) |
| Standard Rotor Capacity | 24 × 1.5/2.0 mL microcentrifuge tubes |
| Optional Rotor A | 12 × 5 mL conical tubes |
| Optional Rotor B | 8 × 4 × 0.2 mL PCR strips (32 PCR tubes total) |
| Rotor Material | Aluminum alloy — autoclavable |
| Rotor Lid | Aerosol-tight biosafety containment lid |
| Rotor Chamber | Fully enclosed steel structure — explosion-proof |
| Operation Modes | Timed · Continuous · PULSE quick-spin |
| Stored Programs | 9 user-programmable protocols |
| Display | Large TFT color touchscreen with wide viewing angle |
| Lid Mechanism | Motor-driven double-lock — light pressure close, auto-release |
| Motor Type | Brushless DC — maintenance-free, silent operation |
| Safety Devices | Overspeed protection · Imbalance detection · System protection · Lid-lock protection · Over-temperature protection |
| Status Indicator | Color-coded bar light — run / warning / alarm |
| Input Power | 110–240 V, 50–60 Hz |
| Warranty | 2-year all-inclusive manufacturer's warranty |
Surge Scientific Warranty & Support
Every CF221 ships with a 2-year all-inclusive manufacturer's warranty covering parts and labor. Our instrument specialists are available for rotor selection, application guidance, and post-purchase technical support. Contact us at 855.943.3344 or info@SurgeScientific.com. In stock at our New Jersey warehouse — most orders ship within 1–2 business days.