HsiangTai COD-1004/1008 Oil Testing Benchtop Centrifuge

Overview

The HsiangTai COD-1004 and COD-1008 are floor-standing low-speed centrifuges specifically engineered for routine oil analysis and petroleum product testing in quality control laboratories, refinery labs, and third-party testing facilities. Designed in accordance with ASTM D93, ASTM D4052, ISO 3733, and IP 176 standards—commonly referenced in lubricant, transformer oil, and fuel sediment/water separation protocols—these units operate on the principle of sedimentation-based phase separation under controlled gravitational force. Unlike high-speed or ultracentrifugal systems, the COD series prioritizes reproducible, gentle separation of immiscible phases (e.g., oil–water–solid particulates) without emulsification or thermal degradation. The fixed-angle horizontal rotor configuration ensures uniform radial distribution of sample tubes during acceleration and deceleration, minimizing shear-induced re-suspension and supporting consistent layer formation for visual or gravimetric quantification of contaminants.

Key Features

• Robust cast-iron base and reinforced steel chassis ensure mechanical stability during extended operation at rated speed (2,000 rpm), reducing vibration transmission to adjacent instrumentation.
• Microprocessor-controlled brushless DC motor delivers precise speed regulation (±10 rpm accuracy) and programmable ramp profiles (acceleration/deceleration in 10–60 s range), critical for method reproducibility across ASTM-compliant test sequences.
• Horizontal swing-out rotor accommodates up to eight 20 mL or four 40 mL conical centrifuge tubes (standard polypropylene or glass), with positive-locking bucket retention to prevent disengagement during rotation.
• Integrated safety interlock system halts rotation immediately upon lid opening; door latch mechanism complies with IEC 61010-1 requirements for laboratory electrical equipment.
• Front-panel digital display shows real-time rpm, elapsed time, and remaining time; memory stores up to 10 user-defined protocols for rapid recall during batch testing.
• No refrigeration unit—optimized for ambient-temperature oil sample processing where thermal stabilization is not required per standard test methods.

Sample Compatibility & Compliance

The COD-1004/1008 supports standard borosilicate glass or autoclavable polypropylene centrifuge tubes (15–50 mL capacity), compatible with hydrocarbon-based samples including mineral oils, synthetic lubricants, diesel fuel, and insulating oils. Its maximum RCF of 1,150 × g meets the nominal force requirements specified in ASTM D2709 (water and sediment in fuel oils) and ASTM D1796 (sediment in fuel oils by centrifuge method). Units are CE-marked and conform to EN 61010-1:2010 for electrical safety. While not certified for GLP/GMP environments out-of-the-box, the firmware architecture permits audit-trail logging when integrated with external LIMS via RS-232 interface (optional), supporting traceability for ISO/IEC 17025-accredited laboratories.

Software & Data Management

These models operate as standalone instruments with embedded firmware—no proprietary PC software is bundled. However, serial communication (RS-232 port) enables integration with laboratory information management systems (LIMS) or custom SCADA platforms for automated run logging, timestamped parameter capture (speed, duration, rotor ID), and electronic record retention. Firmware supports configurable password protection for protocol modification, satisfying basic data integrity controls aligned with FDA 21 CFR Part 11 principles when deployed within validated workflows. Exported logs include operator ID, date/time stamp, and cycle completion status—suitable for internal QA documentation.

Applications

• Determination of water and sediment content in crude oil and refined petroleum products per ASTM D96 and IP 176.
• Separation and quantification of insoluble sludge in turbine and hydraulic oils (ASTM D893).
• Preparatory cleanup of used lubricants prior to FTIR or elemental analysis (e.g., ASTM D6595).
• Removal of free water and particulate contaminants from transformer oil before dielectric strength testing (IEC 60156).
• Routine QC screening of biodiesel blends for phase separation stability (ASTM D7467 Annex A2).

FAQ

What is the difference between COD-1004 and COD-1008 models?

The COD-1004 accepts a maximum of four 40 mL tubes (160 mL total), while the COD-1008 supports eight 20 mL tubes (also 160 mL total); both share identical drive mechanics, control firmware, and safety architecture.
Is rotor balancing required before each run?

Yes—symmetrical mass distribution is mandatory. The horizontal rotor design requires paired tube loading (e.g., 2, 4, 6, or 8 tubes) with matched fill volumes (±0.5 g tolerance) to maintain dynamic balance and prevent premature bearing wear.
Can this centrifuge be used for biological samples?

No—it is not designed for sterile operation, lacks refrigeration, and does not meet biosafety containment requirements (e.g., Class II cabinet integration or aerosol-tight sealing). It is strictly intended for non-volatile, non-hazardous petroleum matrices.
Does it support timed runs with automatic stop?

Yes—digital timer allows preset durations from 1 minute to 99 minutes and 59 seconds, with audible alert and automatic motor shutdown upon completion.
What maintenance is recommended for long-term reliability?

Biannual inspection of rotor threads and bucket latches, annual calibration of speed sensor against NIST-traceable tachometer, and quarterly cleaning of air intake grilles to prevent motor overheating in continuous-use environments.