Allsheng TD2-24 Medical Centrifuge for Blood Typing and Column Agglutination Assays

Overview

The Allsheng TD2-24 Medical Centrifuge is a purpose-built, microprocessor-controlled centrifuge engineered specifically for clinical immunohematology applications. It operates on the principle of controlled rotational acceleration to separate cellular components within standardized column agglutination assay (CAA) cards—widely adopted in blood bank laboratories for ABO/Rh typing, antibody screening, identification, and compatibility testing. Unlike general-purpose centrifuges, the TD2-24 delivers precise, reproducible g-force profiles calibrated to the sedimentation kinetics of red blood cells (RBCs) in gel- or microtube-based immunocolumns. Its design conforms to the operational requirements defined in CLSI EP12-A2 and ISO 15189 for pre-analytical phase standardization in transfusion medicine. The unit integrates bidirectional rotation capability—a critical feature enabling compatibility with proprietary reagent cards from multiple global manufacturers (e.g., Bio-Rad, Ortho Clinical Diagnostics, Grifols), where alternating spin direction prevents column clogging and ensures uniform cell migration through the separation matrix.

Key Features

• Brushless DC motor with closed-loop speed regulation ensures long-term torque stability and eliminates carbon brush wear, reducing maintenance intervals and eliminating particulate contamination risks in cleanroom or laminar flow cabinet environments.
• Intuitive LCD interface supports dual-parameter input: simultaneous display and real-time conversion between rotational speed (rpm) and relative centrifugal force (RCF, ×g), facilitating method transfer across instruments and compliance with SOP-driven workflows.
• Dual-mode operation: programmable unidirectional or alternating-direction centrifugation—optimized for both conventional gel cards and newer capillary-based immunochromatographic formats requiring directional shear control.
• Integrated imbalance detection system continuously monitors rotor dynamics during acceleration, deceleration, and steady-state operation; triggers audible/visual alarm and immediate shutdown if mass asymmetry exceeds ±2.5 g tolerance—meeting IEC 61010-2-020 safety requirements for medical laboratory equipment.
• Electronically interlocked lid with force-sensing latch prevents accidental opening during operation and enforces mandatory lid closure prior to run initiation—fully compliant with EN 61326-1 electromagnetic compatibility and mechanical safety directives.
• Two-step programmable protocol storage (e.g., initial low-speed wash followed by high-speed agglutination spin) enables full automation of multi-phase assays without manual intervention, supporting ISO 15189 clause 5.5.2 on analytical process control.

Sample Compatibility & Compliance

The TD2-24 accommodates up to 24 immunohematology columns per run—compatible with both 6-column and 8-column card configurations used in routine blood grouping and antibody detection. Its rotor geometry and acceleration profile have been validated for use with all major commercially available column agglutination systems certified under CE-IVD and FDA 510(k) pathways. The device meets essential performance criteria outlined in CLSI MM17-A3 for centrifuge validation in blood bank settings, including temperature rise <2°C during maximum-duration runs and positional repeatability of ±0.3 ×g across all column positions. It is suitable for GLP- and CAP-accredited laboratories performing transfusion-related testing under 21 CFR Part 11–aligned data integrity frameworks when paired with optional audit-trail-enabled software modules.

Software & Data Management

While the TD2-24 operates as a standalone instrument, its firmware architecture supports RS-232 serial output for integration into laboratory information systems (LIS) via middleware protocols. Optional firmware upgrade enables timestamped event logging—including start/stop times, selected program ID, actual RCF achieved, and imbalance fault codes—for traceability in internal quality audits. All user-defined protocols are retained in non-volatile memory with battery-backed retention (>10 years), ensuring continuity after power loss. No cloud connectivity or proprietary software installation is required, minimizing cybersecurity exposure while maintaining full regulatory alignment with HIPAA and GDPR data-handling principles for protected health information (PHI).

Applications

• ABO and Rh(D) blood group determination using gel card technology
• Antibody screening and identification via indirect antiglobulin test (IAT) columns
• Direct antiglobulin test (DAT) performance on patient RBCs
• Red blood cell washing prior to antigen typing or elution procedures
• Standardized centrifugation steps in molecular blood group genotyping sample prep workflows
• Quality control verification of column-based reagent lot performance

FAQ

Is the TD2-24 certified for clinical diagnostic use in the United States?

The TD2-24 is CE-IVD marked and manufactured under ISO 13485:2016 quality management system certification. For U.S. clinical deployment, it is intended for research-use-only (RUO) unless integrated into an FDA-cleared test system by the assay manufacturer.
Can the centrifuge be validated for IQ/OQ/PQ per GMP requirements?

Yes—Allsheng provides a comprehensive validation support package including factory calibration certificates, performance verification templates aligned with ASTM E2500-13, and documented test protocols for installation qualification (IQ), operational qualification (OQ), and performance qualification (PQ).
Does the instrument support remote monitoring or network connectivity?

No Ethernet or Wi-Fi interface is built-in; however, RS-232 output allows connection to local PCs or LIS terminals for basic run logging. No remote access or cloud-based functionality is implemented, preserving network isolation per laboratory cybersecurity policies.
What maintenance is required beyond routine cleaning?

Annual verification of rotor balance, speed accuracy (±20 rpm), and RCF calibration using NIST-traceable tachometer and accelerometer is recommended. Brushless motor design eliminates scheduled commutator servicing.