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A Guide to Centrifuge Types & Their Use in Research Laboratory

December 2, 2025 Blog

Introduction: Why Centrifuges Are Essential in Research Laboratory

Centrifuges are fundamental instruments in clinical and research laboratories. They enable the separation of blood components, cells, proteins and nucleic acids processes that influence nearly every diagnostic decision.

häberle LABORTECHNIK supports laboratories with high-quality centrifuge systems from Eppendorf SE, Thermo Elect.LED GmbH (Kendro), Ohaus GmbH, and Sigma-Laborzentrifugen GmbH expert guidance and comprehensive technical services.

This guide explains the key centrifuge types used in medical labs, the underlying technical principles and how to select a device based on diagnostic requirements.

How Centrifuges Work: RCF, RPM and Sedimentation

When a sample is spun, particles separate according to their density under centrifugal force.

Key terms:
  • RPM: rotor speed
  • RCF (g-force): effective centrifugal force
  • RCF is the critical parameter because it accounts for rotor radius and speed.
Modern protocols specify g-values to ensure reproducibility.

Centrifuge Types in Medical Laboratories

1. Microcentrifuge

Best for small volumes (0.2–2.0 ml), DNA extraction and PCR workflows.
Features:
  • Up to 16,000 g
  • Compatible with Eppendorf tubes
  • Compact footprint
  • Optional refrigeration

2. Benchtop Centrifuge

Suited for routine diagnostics and blood separation.
Advantages:
  • Medium to high sample capacity
  • Various rotor options
  • Typical forces: 1,500–4,000 g for serum separation

3. Refrigerated Centrifuge

  • Maintains stable temperatures for sensitive biomolecules.
  • Refrigeration prevents heat-related degradation of enzymes, proteins and nucleic acids.

4. High-Speed Centrifuge

For demanding workflows such as cell pelleting or protein purification.

Characteristics:
  • High RCF
  • Advanced temperature and speed control
  • Compatible with specialized rotors

Rotor Types and Their Use

Fixed-Angle Rotors

  • Fast sedimentation
  • Ideal for pellets (cells, DNA)
  • Withstand high g-forces

Swing-Bucket Rotors

  • Horizontal tube position
  • Excellent for serum and plasma separation
  • Produce clean and stable phase layers

Aerosol-tight Caps

Required when handling infectious or hazardous material.

How to Choose the Right Centrifuge

1. Sample volume & vessel types

Blood tubes, microtubes, cryovials, urine containers.

2. g-force requirements

  • Serum: 1,500–2,000 g
  • Urine: 400–500 g
  • DNA pellets: 12,000–16,000 g

3. Safety features

Imbalance detection, lid locking, aerosol-tight systems.

4. Future flexibility

Compatibility with multiple rotors and adapters.

Applications in Clinical Diagnostics

Hematology

Plasma separation and hematocrit preparation.

Clinical Chemistry

Serum preparation for enzyme, hormone and lipid analyses.

Microbiology

Concentration of bacteria or parasites, urine sediment analysis.

Molecular Biology

DNA/RNA purification and PCR workflows.

Centrifuges from Eppendorf SE, Ohaus GmbH, Sigma-Laborzentrifugen GmbH and Thermo Elect.LED GmbH (Kendro) available at Häberle LABORTECHNIK

Eppendorf is known for precision and durability. häberle offers a wide range of micro, benchtop, refrigerated and high-speed centrifuges with matching rotors and adapters.

Benefits include:
  • Reliable temperature and speed control
  • Long-lasting rotor materials
  • High safety standards
  • Versatile models for routine and research labs

Maintenance & Safety Tips

  • Inspect rotors for cracks or corrosion
  • Balance tubes carefully
  • Monitor temperature
  • Ensure proper lid locking
  • Schedule annual service checks

Conclusion

Centrifuges are vital for accurate results in clinical diagnostics. Selecting the right centrifuge type micro, benchtop, refrigerated or high-speed depends on sample type, required g-force and safety needs. With its wide range of Eppendorf centrifuges, häberle LABORTECHNIK laboratories choose the best solution for their workflows.

FAQ

  • Which centrifuge is suitable for small diagnostic labs?
Benchtop centrifuges with swing-bucket rotors cover most routine tasks.

  • When is a refrigerated centrifuge needed?
Whenever samples contain temperature-sensitive biomolecules.

  • RCF or RPM which matters more?
RCF, because it represents actual centrifugal force.

  • Which rotor is best for serum or plasma?
Swing-bucket rotors ensure clean layer separation.
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