HsiangTai H-240 Capillary-Specific Benchtop Centrifuge

Overview

The HsiangTai H-240 is a purpose-engineered benchtop centrifuge optimized exclusively for capillary tube processing in clinical, hematological, and micro-volume research applications. Unlike general-purpose centrifuges, the H-240 integrates a fixed-speed horizontal rotor (RHT-240) that accommodates precisely 24 standard capillary tubes (typically 75 mm length, 1.0–1.2 mm internal diameter), ensuring uniform radial orientation and consistent sedimentation geometry across all samples. Its operation is grounded in classical sedimentation physics—applying controlled centrifugal acceleration (14,820 × g at 12,000 rpm) to separate cellular components (e.g., packed red blood cell volume, plasma, or buffy coat layers) within sealed capillaries. The device operates without variable speed control; instead, its fixed rotational velocity eliminates calibration drift and simplifies SOP execution in high-throughput settings such as blood bank labs, point-of-care diagnostics, and veterinary field units where reproducibility and operator training efficiency are critical.

Key Features

• Capillary-optimized mechanical design: Dedicated RHT-240 horizontal rotor with precision-machined tube holders that secure capillaries at identical angular displacement, minimizing vibration-induced meniscus distortion during deceleration.
• Fixed-speed high-RCF operation: Delivers stable 12,000 rpm and 14,820 × g—sufficient to achieve complete hematocrit separation in ≤5 minutes for whole blood samples per CLSI H56-A2 guidelines.
• Intuitive mechanical timer: Dial-based 0–15 minute countdown with automatic zero-return and audible end-of-cycle beep—eliminates electronic timer failure points and supports use in environments with electromagnetic interference or limited IT infrastructure.
• Integrated capillary reading board: Removable acrylic insert with calibrated scale (0–100% hematocrit) aligned to ISO 7406:2021 visual readout standards, enabling direct post-centrifugation hematocrit estimation without auxiliary instrumentation.
• Compact footprint and robust construction: Aluminum-alloy housing with reinforced base damping; meets IEC 61010-1 safety requirements for Class II laboratory equipment; operating noise <58 dB(A) at 1 m distance.

Sample Compatibility & Compliance

The H-240 accepts standard heparinized, EDTA-coated, or lithium heparin capillary tubes (e.g., Microvette® 20 µL, StatSeal® 50 µL). It is validated for use with whole blood, serum, plasma, and bacterial suspensions up to OD₆₀₀ = 2.0. While not certified under FDA 510(k) or CE-IVD, the unit complies with essential safety and EMC requirements per IEC 61010-1:2010 and IEC 61326-1:2012. Its fixed-speed architecture inherently supports audit-ready documentation—no firmware updates, no software logs—making it suitable for GLP-regulated environments where instrument qualification focuses on mechanical verification (e.g., speed calibration via tachometer, RCF validation per ASTM E2500-13 Annex A3).

Software & Data Management

The H-240 operates entirely without embedded software or digital interfaces. All operational parameters are manually set and verified physically: time via calibrated dial, speed is factory-locked, and rotor integrity is confirmed through periodic visual inspection of RHT-240 balance rings and tube clip retention force. This analog-first design eliminates cybersecurity vulnerabilities, avoids 21 CFR Part 11 compliance overhead, and ensures uninterrupted operation during power fluctuations or network outages—critical for satellite clinics or mobile diagnostic units. Maintenance records (e.g., rotor usage cycles, bearing lubrication intervals) are maintained offline per ISO/IEC 17025:2017 Clause 6.4.10.

Applications

• Hematocrit determination in resource-limited or field-deployed laboratories (e.g., WHO Essential Diagnostics List Tier 2 settings).
• Micro-volume sample concentration prior to MALDI-TOF MS or capillary electrophoresis injection.
• Bacterial pellet preparation from broth cultures for antibiotic susceptibility testing (AST) using microdilution panels.
• Plasma isolation from fingerstick blood for rapid coagulation assays (PT/aPTT) or glucose monitoring.
• Quality control of capillary tube manufacturing—verifying fill consistency and seal integrity under standardized centrifugal stress.

FAQ

Is the H-240 compatible with non-standard capillary diameters or lengths?

No—the RHT-240 rotor is dimensionally constrained for 75 mm × 1.0–1.2 mm ID capillaries only. Deviations risk imbalance, rotor damage, or incomplete sedimentation.
Does the unit support rotor autoclaving or chemical sterilization?

The RHT-240 rotor is constructed from anodized aluminum and may be wiped with 70% ethanol or isopropanol; autoclaving is prohibited due to thermal expansion mismatch between rotor body and tube clips.
Can the mechanical timer be replaced with a digital module?

No—timer functionality is integral to the front-panel gear train and cannot be retrofitted. HsiangTai does not offer digital upgrade kits for the H-240 platform.
What is the recommended maintenance interval for the drive belt and bearings?

Under typical use (≤8 hrs/day, 5 days/week), inspect belt tension every 6 months and replace bearings after 10,000 operational hours or visible wear—per HsiangTai Service Bulletin SB-H240-2023.
Is technical support available outside Taiwan?

Yes—authorized distributors (e.g., Chubai Lab Instruments in mainland China) provide local calibration services, spare rotor certification, and mechanical repair under HsiangTai’s global warranty framework (24 months parts, 12 months labor).