SETA SETAVAP2 Automated Micro Vapor Pressure Analyzer

Overview

The SETA SETAVAP2 Automated Micro Vapor Pressure Analyzer is a precision-engineered instrument designed for the rapid, reliable, and fully automated determination of Reid Vapor Pressure (RVP) and related vapor pressure parameters in volatile petroleum products—including gasoline, naphthas, reformulated fuels, and light distillates. Operating on the standardized equilibrium vapor pressure principle defined by ASTM D5191 and equivalent international methods, the SETAVAP2 measures the absolute pressure exerted by the vapor phase in equilibrium with its liquid phase at a precisely controlled temperature of 37.8 °C (100 °F), under a fixed 4:1 vapor-to-liquid volume ratio. Its micro-scale design—requiring only 3 mL of sample—minimizes reagent consumption, reduces exposure risk, and enables high-throughput laboratory workflows without compromising metrological integrity. The system employs a thermally stabilized test chamber, integrated pressure transducer with 0.1 kPa resolution, and real-time data acquisition to deliver results compliant with regulatory reporting requirements for fuel specification, environmental compliance (e.g., EPA Tier 3), and refinery quality control.

Key Features

• Fully automated operation: All valving, equilibration, pressure sampling, and result calculation are executed without manual intervention.
• Micro-volume analysis: Uses only 3 mL of sample per test—reducing hazardous material handling and disposal costs.
• Triple-parameter output: Simultaneously reports Total Vapor Pressure (P_tot), Dry Vapor Pressure Equivalent (DVPE), and EPA-compliant vapor pressure values.
• Intuitive user interface: Backlit digital display provides step-by-step operational guidance, real-time status feedback, and audible alerts for critical events.
• Self-calibrating thermal and pressure subsystems: Automatic compensation for ambient barometric pressure and chamber temperature drift ensures long-term stability.
• Flexible unit selection: Results displayed in kPa or psi, configurable via front-panel menu.
• Low-power, compact footprint: 70 W power draw and desktop-sized chassis (37 × 13 × 20 cm) support deployment in QC labs, mobile testing units, or field service environments.

Sample Compatibility & Compliance

The SETAVAP2 is validated for use with hydrocarbon-based liquids exhibiting initial boiling points below 120 °C and vapor pressures within the 0–200 kPa range. It supports routine analysis of unleaded gasoline, oxygenated blends (e.g., ethanol-gasoline), aviation turbine fuels (Jet A-1, JP-8), and industrial solvents. Regulatory compliance is embedded in both hardware architecture and firmware logic: the instrument strictly enforces the 37.8 °C ± 0.1 °C thermal setpoint and 4:1 vapor-to-liquid ratio mandated by ASTM D5191, IP 394, IP 409, EN 13016-1/-2, and ISO 3007. Optional software modules enable audit-ready electronic records aligned with GLP and 21 CFR Part 11 requirements—including user authentication, electronic signatures, and immutable timestamped result logs.

Software & Data Management

Data export and instrument control are supported via RS232C serial interface, compatible with standard laboratory LIMS platforms and custom SCADA systems. The onboard firmware implements a deterministic measurement protocol: pressure is sampled once per minute until three consecutive readings fall within a 0.1 kPa tolerance band, at which point the median value is designated as the final RVP. Raw pressure vs. time datasets are retained in non-volatile memory for traceability. Optional PC-based configuration software allows method parameter validation, calibration certificate generation, and periodic verification against NIST-traceable reference standards. No proprietary drivers or cloud dependencies are required—ensuring full data sovereignty and compatibility with air-gapped laboratory networks.

Applications

• Refinery and terminal QC: Real-time RVP verification prior to product release or pipeline transfer.
• Regulatory submission: Generation of EPA, CARB, and EU Directive-compliant vapor pressure reports for fuel certification.
• Research & development: Screening of formulation variants (e.g., ethanol content, volatility modifiers) during fuel blending optimization.
• Contract laboratories: High-reproducibility testing for third-party certification under ISO/IEC 17025-accredited procedures.
• Academic instruction: Teaching core principles of vapor–liquid equilibrium, phase behavior, and standardized petroleum testing methodology.

FAQ

What standards does the SETAVAP2 comply with?
ASTM D5191, IP 394, IP 409, EN 13016-1/-2, ISO 3007, JIS K2258, and NF M07-079 — all at 37.8 °C with 4:1 vapor-to-liquid ratio.
Can the instrument operate outside the 37.8 °C condition?
No — the SETAVAP2 is configured exclusively for the standardized RVP test temperature; it does not support variable-temperature vapor pressure profiling.
Is vacuum generation internal or external?
The instrument includes an integrated vacuum pump capable of achieving < 0.01 kPa base pressure, eliminating the need for external vacuum sources.
How is calibration verified?
Users perform daily verification using certified reference pressure standards; factory calibration certificates include NIST-traceable uncertainty budgets and are valid for 12 months under normal operating conditions.
Does the system support network connectivity or Ethernet?
No — communication is limited to RS232C serial interface; no Wi-Fi, Ethernet, or USB host functionality is provided to maintain electromagnetic compatibility and regulatory simplicity.