Dingyi DD5M Automatic Cap-Removal Low-Speed Centrifuge

Overview

The Dingyi DD5M Automatic Cap-Removal Low-Speed Centrifuge is an engineered solution for high-throughput clinical sample preparation—specifically designed to automate the sequential operations of centrifugation and vacuum tube cap removal in a single, uninterrupted cycle. Unlike conventional low-speed centrifuges requiring manual decapping post-run, the DD5M integrates precision pneumatic cap-lifting mechanisms with microprocessor-controlled rotor dynamics to deliver reproducible separation of serum, plasma, or cellular components from evacuated blood collection tubes (e.g., EDTA, heparin, SST). Operating at a maximum speed of 4000 rpm and generating up to 3780 × g, it meets the mechanical and thermal stability requirements for routine clinical diagnostics, immunoassay preprocessing, and radioimmunoassay (RIA) workflows. Its design adheres to IEC 61010-1 safety standards for laboratory equipment and incorporates structural safeguards against imbalance-induced vibration—critical for unattended operation in hospital core labs, blood banks, and nuclear medicine departments.

Key Features

• Integrated automatic cap-removal system compatible with standard 5–7 mL vacuum采血管 (vacutainers), supporting up to 124 tubes per run using the 148-position horizontal rotor configuration.
• Full-steel frame with stainless-steel centrifuge chamber (AISI 304), ensuring corrosion resistance, long-term structural integrity, and compliance with GLP cleaning protocols.
• Brushless AC frequency-controlled motor with direct drive architecture—eliminating carbon brush wear, reducing particulate generation, and enabling silent operation (<65 dB[A]).
• TFT true-color touchscreen interface with intuitive icon-based navigation; supports real-time parameter adjustment—including speed, time, and acceleration/deceleration profiles—without interrupting active runs.
• 10 programmable acceleration and deceleration ramp options, minimizing shear stress on fragile biological matrices during spin-up and spin-down phases.
• Dual-mode rotor locking: electromagnetic door interlock combined with mechanical latch ensures secure containment during operation and failsafe disengagement upon completion.
• Active dynamic balancing system with four-point suspension and silicone-damped base mount—enabling stable performance even with partial tube loading or minor mass asymmetry.
• Onboard memory for 20 user-defined protocols, each storing speed, time, temperature (ambient), acceleration/deceleration rates, and rotor ID verification data.

Sample Compatibility & Compliance

The DD5M accommodates a broad range of primary and secondary sample containers through interchangeable horizontal rotors—including 4 × 500 mL elliptical buckets, 148 × 7 mL vacutainer carriers, and optional 2 × 96-well microplate adapters. It is validated for use with common anticoagulant tubes (EDTA-K2/K3, sodium citrate, lithium heparin) and serum separator tubes (SST), maintaining clot retraction kinetics and minimizing hemolysis risk under standardized 10–15 min centrifugation cycles. The system complies with ISO 13485:2016 (medical device quality management), meets essential requirements of the EU Medical Device Regulation (MDR 2017/745) as a Class I non-sterile instrument, and supports audit-ready documentation for CAP, CLIA, and JCI-accredited laboratories. All firmware logs—including run timestamps, rotor serial numbers, speed deviations (>±50 rpm), and error codes—are timestamped and exportable via USB for FDA 21 CFR Part 11–aligned record retention.

Software & Data Management

While the DD5M operates autonomously via its embedded control system, optional PC connectivity (RS-232 or USB-to-serial) enables integration with LIMS platforms via ASCII command protocol. Run logs—including date/time, rotor ID, set vs. actual speed, elapsed time, and fault flags—are stored in non-volatile memory for ≥10,000 cycles and can be exported in CSV format. Firmware supports configurable audit trail settings: operator login (optional PIN), parameter change logging with pre/post values, and automatic session termination after 15 minutes of inactivity. For regulated environments, optional validation packages include IQ/OQ documentation templates aligned with GAMP 5 principles and traceable calibration certificates for speed and timer accuracy (NIST-traceable reference standards).

Applications

The DD5M serves as a mission-critical workflow accelerator in clinical pathology labs performing high-volume serum/plasma isolation prior to ELISA, chemiluminescence immunoassay (CLIA), or automated analyzer input. Its cap-removal function eliminates manual handling steps that introduce variability in tube labeling, aerosol generation, and biohazard exposure—directly supporting OSHA Bloodborne Pathogens Standard (29 CFR 1910.1030) compliance. In blood banking, it streamlines component separation (RBCs, platelets, fresh frozen plasma) from whole blood units while preserving viability markers. Nuclear medicine departments utilize it for rapid preparation of radiolabeled tracer samples requiring minimal processing time between synthesis and administration. Additionally, it supports research applications in clinical proteomics, where consistent, low-shear pelleting of extracellular vesicles or circulating nucleic acids is required prior to downstream extraction.

FAQ

Does the DD5M support refrigerated operation?

No—the DD5M is a non-refrigerated low-speed centrifuge optimized for ambient-temperature clinical separations. For temperature-sensitive applications, consider the TL5R or TL6R series of low-speed refrigerated centrifuges.

Can the cap-removal mechanism handle tubes with rubber stoppers or push-top closures?

The system is calibrated exclusively for standard vacuum blood collection tubes with crimp-sealed metal caps (e.g., BD Vacutainer®, Greiner Bio-One). Push-top or non-standard closures are not supported and may cause mechanical jamming.

Is rotor imbalance compensation fully automatic?

Yes—the integrated dynamic balancing algorithm detects and compensates for load asymmetry in real time, allowing safe operation at full speed even with three of four 500 mL buckets loaded.

What maintenance intervals are recommended?

Annual inspection of pneumatic actuators, door lock sensors, and rotor seating surfaces is advised. Brushless motor requires no scheduled maintenance; centrifuge chamber cleaning with 70% ethanol is recommended after each shift in high-biohazard environments.