Foxsense PAROX 2000 Plus Paramagnetic Oxygen Analyzer

Overview

The Foxsense PAROX 2000 Plus is a high-stability, laboratory-grade paramagnetic oxygen analyzer engineered for continuous, trace-to-full-range O₂ measurement in demanding industrial and environmental monitoring applications. Unlike electrochemical or zirconia-based sensors, the PAROX 2000 Plus employs true paramagnetic detection—leveraging the strong magnetic susceptibility of molecular oxygen—to deliver exceptional selectivity, long-term baseline stability, and immunity to cross-interference from CO₂, CO, hydrocarbons, moisture, and most inert gases. Its core Parox1200 sensor operates reliably at ambient temperatures up to 55°C without thermal drift compensation, making it suitable for integration into process skids, cleanroom HVAC systems, combustion control loops, and ambient air quality stations where thermal management is constrained. The analyzer conforms to fundamental physical measurement principles defined in ISO 8573-1 (compressed air purity), ASTM D6245 (oxygen in ambient air), and supports traceable calibration protocols aligned with ISO/IEC 17025 requirements when used with certified reference gases.

Key Features

• True paramagnetic sensing technology—no consumables, no electrolyte degradation, no catalytic poisoning
• Integrated Parox1200 sensor with factory-calibrated sensitivity and temperature-compensated electronics
• Parameterized auto-calibration routine supporting zero/span verification using N₂ and certified O₂ standards
• Rack-mount 19″ 3U chassis (482 × 133 × 245 mm) with IP20 ingress protection—designed for panel integration in control rooms and analyser shelters
• Configurable gas path materials: Viton® elastomers for general-purpose use or chemically resistant PVDF for aggressive or halogenated sample streams
• Modular flow management: optional mechanical flowmeter for visual verification or electronic flowmeter with digital display, programmable low-flow alarm, and 4–20 mA output
• Flexible pressure handling: selectable electronic pressure compensation (±10 kPa range), integrated pressure regulator, or external analog pressure input (0–10 V or 4–20 mA) for real-time dynamic correction
• Dual-channel capability via MULTI2000Plus firmware and hardware expansion—enabling simultaneous monitoring of two independent sample streams with individual calibration tables and alarm sets

Sample Compatibility & Compliance

The PAROX 2000 Plus is validated for use with dry, non-corrosive, particle-free gas matrices. When equipped with optional inline particulate filters and hydrophobic membrane traps, it accommodates samples with dew points down to –20°C. Gas path wetted materials comply with USP Class VI and FDA 21 CFR Part 11 material eligibility guidelines for pharmaceutical-grade air monitoring. All configurations meet CE marking requirements under the EU Measuring Instruments Directive (MID 2014/32/EU) and electromagnetic compatibility standards EN 61326-1. For GMP environments, audit trail functionality—including operator ID, timestamped calibration events, parameter changes, and alarm logs—is available through optional firmware extension compliant with Annex 11 and ALCOA+ data integrity principles.

Software & Data Management

The analyzer features embedded web server access via Ethernet (RJ45) or RS-485 Modbus RTU protocol, enabling remote configuration, real-time data streaming, and historical trend export (CSV). Local HMI includes a 4-button keypad and dual-line LCD display showing O₂ concentration, flow status, pressure reading (if enabled), and system diagnostics. All calibration and maintenance records are stored internally with tamper-resistant timestamps. Optional PC software (ParoxView Suite) provides automated report generation, statistical process control (SPC) charting, and integration with SCADA systems via OPC UA. Data export supports ISO 14644-1 compliance reporting for cleanroom classification audits.

Applications

• Ambient air quality monitoring networks requiring EPA-equivalent O₂ reference measurements
• Pharmaceutical nitrogen blanketing and inert gas purge validation (ISO 14644-2)
• Combustion efficiency optimization in boilers, incinerators, and thermal oxidizers
• Control of modified atmosphere packaging (MAP) lines for food processing
• Leak testing of vacuum chambers and sealed enclosures using O₂ ingress rate analysis
• Validation of oxygen depletion systems in fire suppression installations (NFPA 2001)
• Research-grade atmospheric simulation chambers and hypobaric/hyperbaric test facilities

FAQ

What is the measurement principle used in the PAROX 2000 Plus?
It uses high-sensitivity paramagnetic detection based on the differential magnetic susceptibility of O₂ molecules in a non-uniform magnetic field—providing direct, physics-based quantification without chemical reaction or electrode wear.
Does the analyzer require periodic sensor replacement?
No—the Parox1200 sensor has no consumable elements and is rated for ≥10 years of continuous operation under specified environmental conditions.
Can it measure oxygen in corrosive or humid gas streams?
Only with appropriate pre-conditioning: integrated or external coalescing filters, refrigerated dryers, and PVDF gas path selection are mandatory for such applications.
Is pressure compensation mandatory for accurate readings?
Not universally—but for applications with variable inlet pressure (>±2 kPa fluctuation), electronic or regulated pressure compensation is strongly recommended to maintain ±0.1% O₂ accuracy.
How is calibration traceability ensured?
Calibration is performed using NIST-traceable or ISO 6141-certified gas standards; all calibration events are logged with unique identifiers, operator credentials, and uncertainty budgets per ISO/IEC 17025 Clause 7.7.