O2 Analyzers

Precision Oxygen Measurement for Gas Applications

Oxygen (O2) measurement is critical for process control, safety, and regulatory compliance in the oil and gas industry. Circle B Measurement & Fabrication provides high-accuracy O2 analyzers designed for continuous monitoring, process optimization, and reliable performance in upstream, midstream, and processing environments.

O2 analyzers are essential for detecting oxygen levels in natural gas streams, ensuring gas quality, preventing corrosion, and supporting safety protocols. By combining advanced instrumentation with expert integration and field services, Circle B delivers O2 measurement solutions operators can trust for both operational and commercial applications.

Start working with us today!

Our experts are ready to meet your needs and help with next steps.

Get Started

Start working with us today!

Our experts are ready to meet your needs and help with next steps.

Get Started

Why Choose Circle B for O2 Analyzers

Operators rely on Circle B for O2 analyzers because we provide:

Comprehensive Product Options: AMI 2010BX and AMI Watchdog analyzers for varying accuracy, response time, and installation requirements.
Compliance with Standards: Analyzers installed, calibrated, and maintained according to API, GPA, and BLM guidelines.
Turnkey Integration: Systems are installed on skids, piping systems, or sampling networks for immediate operational readiness.
Full Lifecycle Support: Calibration, troubleshooting, and maintenance from experienced Circle B field service technicians.

With these capabilities, Circle B O2 analyzers ensure accurate measurement, improved process efficiency, and confidence in gas quality monitoring.

O2 Analyzer Product Offerings

AMI – 2010BX

The AMI 2010BX O2 analyzer delivers continuous, high-accuracy oxygen measurement for natural gas applications. Key features include:

Electrochemical sensing technology for precise O2 detection
Fast response times for real-time monitoring and control
Robust design for reliable operation in harsh process environments
Compliance with API and GPA standards for gas analysis

The 2010BX is ideal for midstream pipelines, processing facilities, and custody transfer points where accurate oxygen monitoring is critical.

AMI – Watchdog

The AMI Watchdog O2 analyzer provides advanced continuous monitoring with enhanced safety and performance capabilities:

Real-time measurement with high sensitivity for low-level oxygen detection
Integrated diagnostics for predictive maintenance and fault detection
Designed for installation in pipelines, skid-mounted systems, or process enclosures
Supports regulatory reporting and compliance with industry standards

The Watchdog analyzer is particularly well-suited for upstream and midstream operations requiring proactive gas quality monitoring and operational safety.

Integration with Skids and Sampling Systems

Circle B does more than provide standalone O2 analyzers — we deliver fully integrated measurement solutions:

Skid Fabrication: Analyzers can be mounted on custom skids with sampling systems, piping, and support structures designed for accurate measurement.
Sampling Systems: Continuous and spot sampling solutions ensure representative gas flow for precise oxygen detection.
Control and Data Integration: O2 analyzers can interface with flow computers, SCADA, and MVS systems for real-time monitoring, logging, and reporting.

By integrating O2 analyzers into skids and sampling systems, Circle B ensures reliable, repeatable measurement and seamless operational oversight.

Compliance and Industry Standards

Circle B ensures O2 analyzer installations comply with recognized standards for safety and measurement accuracy:

API MPMS: Standards for hydrocarbon and process gas measurement
GPA 2145 / 2172: Physical property and heating value calculations for gas streams
BLM SOPs: Where applicable, for gas sampling and analysis
ASTM Materials: Certified materials used for sensor housing, sampling lines, and mounting hardware
ASME Codes: B31.3/B31.8 compliance for skid and piping integration

Compliance with these standards ensures O2 analyzers provide accurate, defensible data while supporting operational safety and regulatory adherence.

Field Services and Lifecycle Support

Circle B offers comprehensive field services for O2 analyzers:

Calibration & Verification: Ensuring ongoing accuracy per API and GPA standards
Maintenance & Troubleshooting: Field inspection, sensor replacement, and diagnostic support
Integration Support: Flow computers, MVS, and SCADA system interface for real-time validation
Sampling System Maintenance: Ensuring consistent, representative gas flow for reliable O2 readings

This lifecycle support ensures O2 analyzers deliver precise, continuous monitoring while minimizing downtime and maintenance costs.

Applications Across the Energy Industry

O2 analyzers from Circle B are essential for a variety of operational contexts:

Upstream Production: Monitoring oxygen in wellhead, gas lift, and production gas streams to prevent corrosion and maintain process integrity
Midstream Transmission: Pipeline monitoring for gas quality and safety, ensuring oxygen levels remain within tolerance
Processing Facilities: Detection of O2 in dehydration, compression, and treatment systems for optimal process control
Safety and Environmental Compliance: Continuous monitoring to meet regulatory requirements and minimize operational risk

Circle B tailors every O2 analyzer installation to specific operational requirements, ensuring accurate, repeatable, and reliable measurement across all applications.

Why Choose Circle B Measurement & Fabrication

Circle B’s expertise in O2 analyzers combines technical knowledge, system integration, and field service excellence:

Expert guidance on analyzer selection and sizing
Turnkey integration with skids, sampling systems, and control platforms
Full compliance with API, GPA, BLM, and ASME standards
Comprehensive lifecycle support including calibration, maintenance, and troubleshooting

Operators can rely on Circle B to deliver high-accuracy, fully compliant O2 measurement solutions that support process efficiency, safety, and regulatory requirements.