MKN TDL-50 Benchtop Centrifuge

Overview

The MKN TDL-50 Benchtop Centrifuge is a precision-engineered, fixed-angle, low-speed centrifuge designed for routine separation tasks in clinical, biochemical, and pharmaceutical laboratories. It operates on the principle of sedimentation under controlled rotational force—generating up to 2325 × g at its maximum speed of 4000 rpm—to separate suspended particles, cells, or immiscible liquid phases based on density differentials. Unlike high-speed or ultracentrifuges, the TDL-50 is optimized for robust, daily-use applications such as serum/plasma separation, immunoprecipitation pellet recovery, and basic cell harvesting—where reproducibility, operational safety, and thermal stability are prioritized over extreme g-force performance. Its compact footprint and balanced mechanical architecture minimize vibration transmission, enabling stable operation on standard laboratory benches without dedicated anchoring.

Key Features

• Stepless speed control via analog dial interface—enabling precise adjustment from 0 to 4000 rpm in real time without discrete speed steps.
• Automatic rotor imbalance compensation system—monitors load distribution during acceleration and deceleration to prevent excessive vibration or shutdown due to minor tube weight discrepancies.
• Thermally optimized aluminum rotor housing—dissipates heat efficiently during prolonged runs, maintaining ambient temperature rise below 12 °C after 30 minutes at full speed.
• Stainless steel centrifuge buckets (6 × 50 mL capacity)—resistant to corrosion from common reagents including saline, ethanol, and buffered solutions; compatible with standard polypropylene or glass centrifuge tubes.
• Digital timer with auto-stop functionality—programmable from 0 to 60 minutes with audible end-of-run alert and immediate brake engagement upon completion.
• Low-noise operation (≤60 dB[A] at 1 m distance)—achieved through precision-balanced rotor assembly, rubber-damped base mount, and aerodynamically shaped bucket carriers.

Sample Compatibility & Compliance

The TDL-50 accommodates a broad range of sample containers—including conical-bottom 15 mL and 50 mL centrifuge tubes, hematocrit capillaries, and small-volume microcentrifuge tubes (when used with appropriate adapters). It supports both aqueous and mildly organic solvent-based matrices, provided samples remain within pH 4–9 and do not exceed 40 °C during processing. The instrument complies with IEC 61010-1 for electrical safety in laboratory equipment and incorporates dual interlock mechanisms: lid-closed detection and automatic rotor lock disengagement only when rotational speed falls below 50 rpm. While not certified to ISO 13485 or FDA 21 CFR Part 11 out-of-the-box, its operational logs (timer settings, run duration, speed confirmation) can be manually documented to support GLP audit trails in regulated environments.

Software & Data Management

The TDL-50 is a standalone electromechanical instrument with no embedded firmware, network interface, or data export capability. All operational parameters—including speed setpoint, timer value, and start/stop events—are configured locally via front-panel controls and retained only during active use. This design eliminates software validation overhead and ensures deterministic behavior across long-term deployment. For laboratories requiring electronic recordkeeping, integration with external lab information management systems (LIMS) is achieved through manual entry or optional third-party USB-connected data loggers (not supplied by MKN). No password protection, user role assignment, or electronic signature functionality is present—consistent with Class I laboratory equipment classification under EU MDR Annex VIII.

Applications

• Clinical diagnostics: Separation of whole blood into serum or plasma layers for ELISA, coagulation assays, and immunochemistry workflows.
• Biochemistry: Precipitation of protein complexes, clarification of crude lysates, and isolation of membrane fractions prior to SDS-PAGE or Western blotting.
• Pharmaceutical QC: Recovery of suspended active pharmaceutical ingredients (APIs) from formulation batches; particulate matter analysis in injectables per USP .
• Environmental testing: Concentration of microbial cells or suspended solids from water samples prior to enumeration or DNA extraction.
• Educational labs: Demonstrating sedimentation kinetics, density gradient principles, and centrifugal force calculations in undergraduate physics and life sciences curricula.

FAQ

What is the maximum relative centrifugal force (RCF) achievable with the TDL-50?

The TDL-50 delivers a maximum RCF of 2325 × g at 4000 rpm with the standard 50 mL bucket configuration (radius = 142 mm). RCF values scale quadratically with rotational speed and linearly with radius—users should consult the RCF conversion chart included in the operator manual when using alternative rotors or tube configurations.
Can this centrifuge be used for infectious or biohazardous samples?

Yes—provided users employ sealed centrifuge buckets and follow BSL-2 containment protocols, including post-run decontamination of the chamber interior and rotor surfaces using 70% ethanol or approved sporicidal agents. The absence of vacuum or refrigeration systems simplifies decon procedures.
Is rotor calibration required before first use?

No factory calibration is needed—the rotor is dynamically balanced during manufacturing and verified per ISO 1940-1 G6.3 grade. However, users must verify tube symmetry and equal mass distribution prior to each run to maintain mechanical integrity and avoid premature bearing wear.
Does the TDL-50 support continuous operation?

It is rated for intermittent duty cycles only: maximum 30 minutes ON followed by ≥10 minutes OFF to ensure thermal equilibrium. Continuous operation may accelerate motor insulation aging and void the one-year limited warranty.
Are replacement parts available for long-term maintenance?

Yes—MKN supplies OEM-certified rotors, buckets, drive belts, and control board assemblies with documented traceability. Spare part lead time is typically 4–6 weeks from order confirmation for international shipments.