HX-WS1840 Petroleum and Synthetic Fluid Water Separability Tester

Overview

The HX-WS1840 Petroleum and Synthetic Fluid Water Separability Tester is an engineered laboratory instrument designed to evaluate the demulsification behavior of lubricating oils, turbine oils, hydraulic fluids, and synthetic base stocks under standardized thermal and mechanical agitation conditions. It operates in accordance with the fundamental principles of interfacial tension-driven phase separation and gravity-assisted coalescence—core phenomena governing water-in-oil emulsion breakdown. The system enables quantitative assessment of water separation kinetics by monitoring the volume of free water accumulated at the bottom of a calibrated test vessel over time, providing critical data for formulation development, quality control, and oxidative stability prediction in industrial fluid systems.

Key Features

• Programmable temperature control (40 °C ± 0.5 °C and 75 °C ± 0.5 °C) compliant with ASTM D1401 and ISO 6614 test protocols
• Integrated mechanical stirrer with precise rotational speed regulation (1500 rpm ± 10 rpm) and timed agitation cycles (30 min standard)
• Dual-scale graduated test cylinder (100 mL capacity, 1 mL resolution) fabricated from borosilicate glass for optical clarity and chemical resistance
• Stainless steel heating bath with PID-regulated immersion heater and insulated chamber to ensure thermal uniformity and minimize ambient drift
• Robust aluminum alloy frame with anti-slip rubber feet and ergonomic handle for stable benchtop operation and safe transport
• Compliance-ready design supporting GLP documentation workflows, including manual timestamp logging and repeatable operator-defined test sequences

Sample Compatibility & Compliance

The HX-WS1840 accommodates standard 40 mL oil + 40 mL distilled water test mixtures per ASTM D1401 methodology, with optional adaptation for low-viscosity synthetics (e.g., polyalkylene glycols) and high-additive formulations. Its geometry and agitation profile are validated for reproducible interfacial shear stress application across kinematic viscosities ranging from 2.5 to 150 mm²/s at 40 °C. The instrument meets essential requirements for routine testing under ISO/IEC 17025-accredited laboratories when operated with documented calibration records for temperature and timer subsystems. While not inherently 21 CFR Part 11-compliant, its analog interface supports integration into validated electronic lab notebooks (ELN) via external digital loggers where audit-trail functionality is mandated.

Software & Data Management

The HX-WS1840 is a hardware-only platform without embedded firmware or proprietary software. All operational parameters—including agitation duration, setpoint temperature, and observation intervals—are manually configured and recorded. This architecture ensures long-term reliability, eliminates firmware obsolescence risks, and simplifies validation in regulated environments where software qualification would otherwise impose significant overhead. Users maintain full traceability through standardized paper-based test logs aligned with internal SOPs or third-party LIMS templates. For digital archiving, raw observation data (time vs. separated water volume) may be exported to CSV-compatible spreadsheets for statistical analysis, trend charting, and comparative reporting across batches or supplier qualifications.

Applications

• Quality assurance of turbine oils prior to commissioning in power generation facilities
• Evaluation of demulsibility performance in aviation hydraulic fluids (MIL-PRF-5606, MIL-PRF-83282)
• Formulation screening for rust inhibitors and emulsion-breaking additives in industrial lubricants
• Monitoring degradation-induced surfactant accumulation during oil-in-service analysis
• Supporting OEM specifications for gear oils used in wind turbine gearboxes (IEC 61400-4)
• Teaching laboratories demonstrating colloidal stability concepts in petroleum engineering curricula

FAQ

What standards does the HX-WS1840 support?
ASTM D1401, ISO 6614, and IP 139 are the primary international standards implemented through its thermal, agitation, and measurement specifications.
Is calibration certification included with shipment?
No factory calibration certificate is supplied; users must perform initial verification using NIST-traceable thermometers and stopwatch calibrators per their internal QA protocol.
Can the unit be used for bio-based lubricants?
Yes—provided the fluid exhibits Newtonian behavior within the specified viscosity range and does not chemically attack borosilicate glass or stainless steel components.
What maintenance is required?
Routine cleaning of the glass cylinder and stirrer shaft with solvent-rinsed lint-free wipes; annual inspection of heater insulation integrity and stirrer motor brush wear.
Does it support automated data capture?
Not natively—but external USB timers, digital calipers, and video-based meniscus tracking systems can be integrated for semi-automated recording in research settings.