APSA-380 Ambient SO2 Analyzer: UV Fluorescence Monitor

The APSA-380 is a sophisticated ambient air quality monitor engineered for the continuous, high-sensitivity detection of Sulfur Dioxide (SO2). Utilizing the proven UV fluorescence (UVF) principle enhanced by proprietary cross-flow modulation, this analyzer provides the stability and detection limits required for demanding environmental monitoring networks and research applications.

This instrument is designed to operate as a standalone unit or integrated within a complete Air Quality Monitoring Station (AQMS), offering plant managers and environmental consultants a reliable solution for regulatory compliance and atmospheric research.

Key Benefits of the APSA-380

• Exceptional Long-Term Stability: The integration of a cross-flow modulation system ensures a constant zero-point calibration, significantly reducing baseline drift and extending the intervals between manual interventions.

• Superior Selectivity: The analytical bench is optimized to eliminate interferences from other atmospheric gases, ensuring that SO2 measurements remain accurate even in complex urban or industrial air matrices.

• High Sensitivity for Trace Detection: With a minimum range capability of 0–50 ppb, the analyzer is ideal for background monitoring and clean-air environments where high-resolution data is critical.

• Reduced Operational Costs: Features a robust internal design with high-quality optical components and a built-in sampling pump, minimizing the need for external peripherals and frequent spare part replacements.

Technical Overview

The APSA-380 operates by exciting SO2 molecules with ultraviolet light and measuring the resulting fluorescence. What differentiates this system is the Cross-Flow Modulation technique. By switching the flow of sample gas and reference gas at a high frequency, the analyzer effectively cancels out background noise and electronic drift.

System Design & Integration

• Compact Form Factor: The unit is designed for standard 19-inch rack mounting, facilitating easy integration into existing environmental enclosures.

• User-Friendly Interface: Equipped with a clear digital display and intuitive menu navigation for localized status checks and configuration.

• Internal Gas Flow Management: Includes an integrated pump and Teflon tubing to ensure sample integrity and simplify the pneumatic setup.

Typical Use Cases

• National Air Quality Networks: Serving as a primary reference instrument for monitoring SO2 levels in urban, suburban, and rural regions.

• Industrial Fence-Line Monitoring: Monitoring the impact of industrial emissions from power plants, refineries, and smelters on the surrounding environment.

• Atmospheric Research: Providing high-resolution data for academic studies regarding acid rain precursors and aerosol formation.

• Regulatory Compliance: Assisting EHS managers in verifying that facility perimeters adhere to local and international environmental air quality standards.

Why Choose the APSA-380 Sulfur Dioxide Monitor?

In a field where data integrity is paramount, the APSA-380 stands out by balancing technical sophistication with industrial-grade durability. Unlike standard monitors that may suffer from "noise" in high-humidity or varying temperature conditions, the APSA-380’s optical bench is engineered for thermal stability and optical purity. This ensures that environmental data collected is both legally defensible and scientifically accurate, backed by one of the most trusted names in analytical instrumentation.