APOA-380 Continuous Ambient Ozone (O3) Monitor

High-Precision UV Absorption Analyzer for Air Quality Networks and Industrial Compliance

The HORIBA APOA-380 is a next-generation continuous ozone analyzer designed for the rigorous demands of ambient air quality monitoring systems (AQMS) and industrial process background checks. Utilizing advanced Cross-Flow Modulated Non-Dispersive Ultraviolet (NDUV) absorption technology powered by a long-life UV LED source, this system delivers exceptional stability and sensitivity while eliminating the environmental hazards associated with traditional mercury lamps.

Key Benefits

• Eco-Friendly & Durable Design: Replaces conventional mercury lamps with a high-efficiency UV LED light source, significantly extending component lifespan and reducing hazardous waste disposal requirements.

• Superior Zero Stability: Features a unique heated ozone decomposer that functions as a reference gas purifier. This minimizes interference from moisture and other background gases, ensuring a stable baseline even in fluctuating environmental conditions.

• Optimized Uptime & Maintenance: The modular internal design facilitates rapid field servicing. Built-in predictive diagnostics and parts timers alert operators to maintenance needs before failure occurs, maximizing data availability.

• Seamless Data Integration: Equipped with a 7-inch color touchscreen for intuitive local control, plus comprehensive connectivity options (Modbus™ TCP/RTU, USB, Ethernet) for effortless integration into modern smart monitoring networks.

Technical Overview

The APOA-380 operates on the Cross-Flow Modulated NDUV principle, the gold standard for low-concentration ozone detection. By continuously alternating the sample gas and a zero-reference gas (generated internally via the heated decomposer) into the measurement cell, the analyzer practically eliminates zero drift.

Performance Capabilities:

• Measurement Range: Ultra-flexible auto-ranging from 0–0.1 ppm up to 0–10 ppm, making it suitable for both pristine background monitoring and high-concentration industrial pollution analysis.

• Detection Limit: Achieves a lower detection limit (LDL) of < 0.3 ppb, ensuring precise capture of trace-level ozone variations.

• Interference Rejection: The optical system is designed to reject common interferents, ensuring that the reported $O_3$ values are chemically specific and regulatory-grade.

System Architecture:

The unit is housed in a standard rack-mountable chassis with a user-friendly front panel. The modular internal layout isolates the gas handling components from the electronics, protecting sensitive circuitry and simplifying replacement of the measurement module or pump.

Typical Use Cases

• National Air Quality Networks: Continuous monitoring of ground-level ozone in urban and rural stations to meet EU and EPA air quality standards.

• Industrial Fence-Line Monitoring: Detecting fugitive emissions and ensuring environmental compliance around petrochemical plants, power stations, and manufacturing facilities.

• Mobile Monitoring Labs: Due to its robust design and vibration resistance, the APOA-380 is ideal for integration into mobile air quality vans and temporary measurement stations.

• Research & Background Studies: High-sensitivity measurement for atmospheric research requiring low-ppb detection limits.

Why Choose the APOA-380?

The APOA-380 distinguishes itself by solving the two most common pain points in ozone monitoring: light source degradation and zero drift. By adopting UV LED technology, it removes the frequent calibration and replacement cycles associated with mercury lamps. Furthermore, its intelligent "Cross-Flow" modulation ensures that the analyzer is constantly referencing itself, providing data integrity that EHS managers and station operators can trust implicitly. This is not just a monitor; it is a low-maintenance, high-reliability compliance tool.