MKN 90-1 Benchtop Electric Centrifuge
| Brand | MKN |
|---|---|
| Model | 90-1 |
| Max Speed | 4000 rpm |
| RCF | 1430 × g |
| Capacity | 6 × 20 mL or 6 × 15 mL or 8 × 5 mL |
| Timer Range | 0–60 min |
| Noise Level | ≤60 dB(A) |
| Power Supply | AC 220 V, 50 Hz, 2 A |
| Safety Feature | Lid-open automatic stop |
| Construction | Die-cast aluminum rotor assembly |
| Dimensions | Not specified |
| Weight | Not specified |
Overview
The MKN 90-1 Benchtop Electric Centrifuge is a compact, microprocessor-controlled laboratory centrifuge engineered for routine sedimentation and phase separation tasks in clinical, biochemical, and research settings. It operates on the principle of centrifugal force generation through high-speed rotation of sample containers around a fixed axis—accelerating particle sedimentation based on differences in density, size, and shape. Designed for benchtop use in space-constrained environments, the unit delivers consistent RCF (Relative Centrifugal Force) up to 1430 × g at its maximum rotational speed of 4000 rpm. Its integrated lid-safety interlock ensures immediate motor shutdown upon lid opening—a critical feature aligned with IEC 61010-1 safety standards for laboratory electrical equipment. The absence of mechanical gear transmission contributes to low thermal load and minimal vibration, supporting stable operation during extended runs.
Key Features
- Stepless speed control with digital RPM/RCF display for precise parameter selection and repeatability
- Automatic rotor balancing compensation system reduces operational drift and extends bearing service life
- Die-cast aluminum rotor with precision-machined tube pockets—resistant to corrosion and compatible with common polypropylene and glass centrifuge tubes
- Programmable timer (0–60 minutes) with audible end-of-run alert and auto-stop functionality
- Low-noise brushless DC motor (<60 dB[A] at 1 m distance) enables quiet operation in shared lab spaces
- Thermally optimized chassis design minimizes surface temperature rise during continuous operation
- Lid-open safety cutoff meets EN 61010-2-020 requirements for centrifuge-specific hazard mitigation
Sample Compatibility & Compliance
The MKN 90-1 accommodates standard conical-bottom centrifuge tubes including 5 mL, 15 mL, and 20 mL formats across three interchangeable rotor configurations (6×20 mL, 6×15 mL, or 8×5 mL). Tube compatibility has been validated for common materials such as polypropylene (PP), polycarbonate (PC), and borosilicate glass under nominal load conditions. While not certified for biosafety level (BSL)-3 or aerosol-generating protocols, the device complies with general-purpose centrifugation requirements outlined in CLSI EP17-A2 for centrifuge performance verification. It supports workflows aligned with ISO 15189 (clinical laboratory quality requirements) and GLP documentation practices when integrated into validated SOPs. No refrigeration or vacuum capability is provided; therefore, it is designated for ambient-temperature applications only.
Software & Data Management
This model operates via embedded firmware without external software dependency. All operational parameters—including speed, time, and RCF—are stored in non-volatile memory and recalled at power-up. The interface provides real-time feedback of elapsed time and remaining runtime but does not support data export, audit trail logging, or remote monitoring. For laboratories requiring 21 CFR Part 11 compliance, integration with third-party LIMS platforms must be achieved through manual entry or external time-stamped logbooks. Routine maintenance records (e.g., rotor usage cycles, calibration checks) are recommended per manufacturer guidelines to ensure traceability and long-term reliability.
Applications
- Serum and plasma separation from whole blood specimens in clinical diagnostics labs
- Precipitation of immune complexes and antigen-antibody aggregates in immunology assays
- Cell pellet harvesting in basic microbiology and cell culture workflows
- Clarification of crude enzyme extracts or protein solutions prior to electrophoresis or chromatography
- Removal of particulates from reagent stocks and buffer preparations
- Supporting ASTM D6978-05 (standard practice for centrifugal separation of emulsions) in quality control environments
FAQ
Is the MKN 90-1 suitable for centrifuging infectious samples?
No—it lacks sealed rotor containment or biocontainment certification and is intended for non-hazardous, low-risk biological fluids only.
Can I use this centrifuge with 50 mL conical tubes?
No—the rotor geometry and tube pocket dimensions are specifically designed for 5 mL, 15 mL, and 20 mL formats; 50 mL tubes exceed mechanical and balance tolerances.
Does the unit include a calibration certificate?
Not by default; users must perform initial speed verification using an accredited tachometer and document results per internal QA procedures.
What is the expected service life of the rotor under normal usage?
With proper cleaning and avoidance of chemical exposure beyond manufacturer-recommended agents, the aluminum rotor typically exceeds 5 years or 10,000 operational cycles.
Is there overload protection built into the drive system?
Yes—the motor controller includes current-limiting circuitry that interrupts power delivery if abnormal torque draw is detected during acceleration.
