Hettich ROTOFIX 32A Benchtop Centrifuge
| Brand | Hettich |
|---|---|
| Origin | Germany |
| Model | ROTOFIX 32A |
| Instrument Type | Benchtop Centrifuge |
| Speed Range | 0–6000 rpm |
| Max RCF | 4226 × g |
| Max Capacity | 4 × 100 mL or 32 × 15 mL |
| Dimensions (H×W×D) | 257 × 366 × 430 mm |
| Weight | 23 kg |
| Power Supply | 208–240 V, 50–60 Hz |
| Power Consumption | 300 VA |
| Electromagnetic Compatibility | EN/IEC 61326-1, Class B |
| Timer Range | 1 s to 99 min 59 s, continuous mode (∞), and short-spin mode |
| Rotor Recognition | Automatic |
| Safety Features | Lid interlock, anti-slip lid latch, imbalance detection, emergency lid release |
Overview
The Hettich ROTOFIX 32A is a robust, general-purpose benchtop centrifuge engineered for reliability and operational consistency in routine laboratory workflows. Utilizing fixed-angle and swing-bucket rotor configurations—primarily optimized for horizontal (swing-out) operation—it operates on the principle of sedimentation under controlled rotational force (RCF). Its design emphasizes mechanical stability at speeds up to 6000 rpm, generating a maximum relative centrifugal force of 4226 × g—sufficient for pelleting mammalian cells, precipitating macromolecules, clarifying suspensions, and separating serum/plasma from whole blood. As a non-refrigerated unit, it is suited for ambient-temperature applications where thermal sensitivity is not a limiting factor, making it especially appropriate for clinical chemistry, cytology, environmental sample preparation, and industrial quality control laboratories requiring high throughput and reproducible separation performance.
Key Features
- Sturdy all-metal housing with stainless-steel centrifuge chamber for long-term corrosion resistance and ease of decontamination
- Ergonomic hinged lid with integrated transparent viewing window and intuitive mechanical latch system—designed for rapid access and visual monitoring without compromising safety
- Automatic rotor identification ensures correct speed and time limits are enforced per installed configuration, minimizing user error
- Integrated imbalance detection system halts operation immediately upon detecting load asymmetry exceeding safe thresholds
- Emergency manual lid release mechanism compliant with IEC 61010-2-020 safety standards for centrifuges
- Membrane keypad interface with tactile feedback enables precise parameter entry—including speed (rpm), time (1 s to 99 min 59 s), and run modes (continuous, timed, or short-spin)
- Low electromagnetic emission profile certified to EN/IEC 61326-1 Class B, ensuring compatibility in shared instrumentation environments
Sample Compatibility & Compliance
The ROTOFIX 32A accommodates standard tube formats including 15 mL conical tubes (up to 32 positions) and 100 mL cylindrical or tapered bottles (up to 4 positions) using compatible swing-out rotors. It supports both plastic and glass tubes, including chromium-plated test tubes commonly used in industrial assay validation. While not designed for biosafety containment or refrigerated processing, its mechanical architecture meets essential safety requirements outlined in IEC 61010-1 (General Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use) and carries CE marking for conformity with EU directives. The instrument is routinely deployed in GLP-aligned environments where audit-ready documentation of centrifugation parameters (speed, duration, rotor ID) supports traceability in regulated testing protocols.
Software & Data Management
The ROTOFIX 32A operates via embedded firmware without external PC dependency. All operational parameters—including actual achieved rpm, elapsed time, and rotor-specific calibration data—are retained in non-volatile memory and displayed in real time during runs. Though it does not feature network connectivity or electronic data export, its deterministic control logic ensures repeatable execution across shifts and operators. For laboratories operating under FDA 21 CFR Part 11 requirements, manual logbook entries—cross-referenced with printed or handwritten run records—can be maintained alongside instrument ID and maintenance history to satisfy basic data integrity expectations in non-critical QC applications.
Applications
- Clinical diagnostics: Serum/plasma separation from whole blood; urine sediment concentration; preparation of peripheral blood mononuclear cells (PBMCs) prior to density gradient centrifugation
- Cell biology: Harvesting adherent and suspension cultures; washing steps in transfection and staining protocols
- Industrial QA/QC: Clarification of emulsions, suspensions, and colloidal dispersions in food, cosmetics, and polymer manufacturing
- Environmental analysis: Solid-liquid separation of water samples prior to heavy metal or nutrient assays
- Academic research: Routine nucleic acid and protein pellet recovery in molecular biology workflows where ultra-high speed or refrigeration is unnecessary
FAQ
Does the ROTOFIX 32A support refrigeration?
No. It is a ventilated, non-cooled centrifuge intended for ambient-temperature operation only.
Can I use fixed-angle rotors with this model?
The ROTOFIX 32A is primarily configured for swing-out rotors; fixed-angle rotor compatibility depends on optional accessory availability and must be verified against Hettich’s official rotor compatibility matrix.
Is rotor calibration required before each use?
No—automatic rotor recognition eliminates manual calibration; however, periodic verification of speed accuracy using a certified tachometer is recommended per ISO/IEC 17025 guidelines.
What safety certifications does this unit hold?
It complies with IEC 61010-1 and IEC 61010-2-020 for laboratory electrical safety, and electromagnetic emissions conform to EN/IEC 61326-1 Class B.
How is maintenance documented for audit purposes?
Users should retain service logs detailing inspection dates, cleaning records, and any firmware or mechanical adjustments—aligned with internal SOPs and ISO 9001 or GLP documentation practices.
