MKN TDL-50A Digital Display Benchtop Centrifuge

Overview

The MKN TDL-50A Digital Display Benchtop Centrifuge is a precision-engineered, general-purpose centrifuge designed for routine separation tasks in clinical, biochemical, and pharmaceutical laboratories. It operates on the principle of sedimentation under controlled rotational acceleration—applying centrifugal force to accelerate phase separation based on particle density, size, and shape. Unlike high-speed or refrigerated models, the TDL-50A is optimized for low-to-moderate RCF applications where thermal stability is not critical, making it ideal for serum/plasma separation, cell pellet recovery, and immunoassay preparation. Its brushless DC motor ensures consistent torque delivery across the full speed range, while the digitally monitored RPM feedback loop enables real-time speed verification with ±2% accuracy—critical for method reproducibility in standardized protocols.

Key Features

• Infinitely variable speed control (0–4000 rpm), digitally displayed with LED readout for precise operational repeatability
• Microprocessor-based timer (0–60 minutes) with automatic rotor stop and audible end-of-run signal
• Self-balancing rotor assembly with precision-machined aluminum alloy rotor head—designed to minimize vibration and extend bearing life
• Stainless steel protective sleeves accommodate standard 50 mL conical centrifuge tubes (e.g., Falcon® 352070), reducing tube deformation and sample loss during deceleration
• Low-noise operation (≤60 dB[A]) achieved via optimized airflow design and vibration-damping base construction—suitable for shared lab environments
• Thermally stable motor housing with passive cooling; temperature rise <15°C after continuous 30-minute operation at maximum speed
• Over-speed protection, lid interlock switch, and automatic imbalance detection ensure compliance with IEC 61010-1 safety standards

Sample Compatibility & Compliance

The TDL-50A supports common disposable polypropylene and polycarbonate centrifuge tubes (15–50 mL), including screw-cap and snap-cap formats. It is routinely employed in CLIA-waived and ISO 15189-aligned workflows for serum separation prior to ELISA, electrophoresis, or spectrophotometric analysis. While not certified for biosafety level (BSL)-2 containment, its sealed rotor chamber and smooth interior surfaces facilitate decontamination using 70% ethanol or 0.5% sodium hypochlorite. The instrument conforms to electromagnetic compatibility (EMC) requirements per EN 61326-1 and carries CE marking for use within the European Economic Area. For FDA-regulated environments, it may be integrated into validated processes under 21 CFR Part 11 when paired with compliant electronic lab notebook (ELN) systems that capture operator ID, run parameters, and timestamped event logs.

Software & Data Management

The TDL-50A operates as a standalone instrument without embedded software or network connectivity. All operational parameters—including set speed, elapsed time, and final RCF—are displayed locally and not stored internally. For audit-trail compliance in GxP settings, users are advised to document run conditions manually or via external logging tools (e.g., LIMS-integrated barcode scanners or dedicated centrifuge monitoring modules). Optional external USB data loggers can be interfaced via analog output ports (if retrofitted by qualified service personnel) to record real-time RPM and timer status for retrospective validation.

Applications

• Routine serum and plasma separation from whole blood (e.g., clinical chemistry pre-analytical processing)
• Pelleting mammalian cells (e.g., HEK293, CHO-K1) post-harvest for lysate preparation or cryopreservation
• Clarification of bacterial culture supernatants prior to protein purification or PCR template preparation
• Phase separation in solvent extraction protocols (e.g., phenol-chloroform DNA isolation)
• Preparative centrifugation of antibody-antigen complexes in diagnostic immunoassays
• Quality control testing of suspension-based reagents and calibration standards

FAQ

Is the TDL-50A suitable for centrifuging infectious samples?
No—this model lacks a sealed biocontainment rotor and is not rated for BSL-2 or higher applications. Use only in conjunction with secondary containment (e.g., sealed buckets or sealed tubes) when handling potentially hazardous materials.
Can I calibrate the speed display myself?
Speed calibration requires traceable tachometer verification against a NIST-traceable reference standard and must be performed by authorized service personnel. Field adjustment is not supported.
Does the centrifuge meet ISO 22870 or CLSI EP25-A2 requirements?
It is not specifically validated per those standards, but its performance characteristics (RCF consistency, timer accuracy, mechanical stability) align with the minimum operational criteria outlined in CLSI EP25-A2 Annex B for basic centrifuge qualification.
What maintenance intervals are recommended?
Inspect rotor threads and sleeve integrity before each use; clean rotor chamber weekly with non-abrasive disinfectant; perform full mechanical inspection and bearing lubrication annually by certified technician.
Is rotor balancing required before every run?
Yes—the unit does not feature active imbalance compensation. Tubes must be loaded symmetrically (e.g., 2×50 mL opposite each other, or 6×50 mL in even-numbered positions) to prevent excessive vibration and premature wear.