Modcon’s patented MOD‑1040 is an in-situ optical oxygen analyzer for demanding industrial process gas applications. It measures oxygen from 1 ppm to 100% O₂ at process pressures up to 350 barg, with a T90 response of under five seconds. Direct installation at the measurement point reduces sample transport delay and can eliminate long sample lines, pressure-reduction systems and much of the associated sample conditioning. Applications include hydrogen production, natural gas, refineries, petrochemical plants, flare gas, biogas, ammonia, inertisation and hydrocarbon processing.
What Is an Oxygen Analyzer?
An oxygen analyzer is an analytical instrument used to measure the amount of oxygen in a gas stream. Depending on the application, oxygen may be measured at trace levels, percentage levels or across a wide measurement range.
In industrial plants, oxygen analyzers are used to monitor process safety, detect air ingress, verify gas quality, protect equipment and support process control. The correct oxygen analyzer depends on the gas composition, pressure, temperature, hazardous-area classification, required response time and measurement range.
| Parameter | MOD‑1040 capability |
|---|---|
| Measurement technology | Patented quenched-fluorescence optical measurement |
| Measurement range | 1 ppm–100% O₂ |
| Process pressure | Up to 350 barg |
| Response time | T90 under 5 seconds |
| Installation | Direct in-situ measurement |
| Compensation | Automatic process pressure and temperature compensation |
| Field servicing | Portable calibration and maintenance device |
| Calibration option | Field calibration manifold |
| Hazardous areas | ATEX, IECEx, ETL Class I Division 1 and ECAS‑Ex |
| Functional safety | SIL‑2 |
| Main applications | Hydrogen, natural gas, refinery gas, flare gas, biogas, ammonia and hydrocarbon processing |
Industrial Oxygen Analyzer Applications
Industrial oxygen analyzers are used in applications where oxygen concentration can affect safety, quality or process performance. Typical applications include hydrogen production, natural gas processing, refinery gas monitoring, petrochemical processes, flare gas systems, biogas upgrading, hydrocarbon process gas and industrial gas production.
Continuous oxygen measurement helps operators detect abnormal process conditions earlier and respond before oxygen contamination causes safety risks, corrosion, quality problems or process instability.
In-Situ Oxygen Analyzer vs Extractive Oxygen Analyzer
Traditional extractive oxygen analyzers require a gas sample to be removed from the process and transported to an analyzer through tubing, pressure reduction, filtration, moisture handling and sample conditioning systems. This approach can be suitable for many applications, but it may introduce sample delay, maintenance requirements and potential changes in sample composition.
Modcon’s patented in-situ oxygen analyzer measures oxygen directly at the process location. This can reduce sample transport delay, simplify the analyzer system and improve response time. In-situ measurement is especially valuable in high-pressure gas streams, hazardous areas and applications where fast detection of oxygen changes is important.
Oxygen Analyzer for Hydrogen Production
Hydrogen production and hydrogen processing applications require reliable oxygen monitoring because oxygen contamination can affect safety, gas purity and equipment protection. Oxygen measurement is important in electrolyzer systems, hydrogen compression, hydrogen storage, hydrogen purification and hydrogen process gas monitoring.
The MOD-1040 Oxygen Analyzer supports continuous oxygen measurement in hydrogen applications, including green hydrogen production and other industrial hydrogen processes where reliable oxygen monitoring is required.
Oxygen in hydrogen can indicate electrolyser crossover, air ingress or a failure in gas purification. Direct high-pressure measurement reduces the delay associated with extracting and depressurising the sample, which is particularly valuable for compressor discharge, storage and hydrogen distribution applications.
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Oxygen Analyzer for Natural Gas and Hydrocarbon Process Gas
Oxygen monitoring in natural gas and hydrocarbon process gas can help detect air ingress, contamination and abnormal operating conditions. Oxygen concentration may affect corrosion risk, gas quality, combustion behaviour, pipeline operation and downstream process reliability.
For these applications, the oxygen analyzer must be selected according to the actual gas composition, operating pressure, hazardous-area requirements and required measurement range. MOD-1040 is designed for oxygen measurement in high-pressure hydrogen, natural gas, refinery gas, petrochemical gas, flare gas, biogas and hydrocarbon process gas streams.
Learn more about natural gas analyzer applications
Oxygen Monitoring in Refineries and Petrochemical Plants
Refineries and petrochemical plants use oxygen analyzers to support process safety, gas quality monitoring and equipment protection. Oxygen measurement may be required in refinery gas streams, flare gas, hydrocarbon process gas, hydrogen networks and other process areas where oxygen contamination or air ingress must be detected.
Online oxygen measurement provides operators and control systems with real-time data, helping improve visibility into process conditions and supporting safer operation in demanding industrial environments.
View refinery process analyzer applications
MOD-1040 Oxygen Analyzer
The MOD-1040 Oxygen Analyzer is patented in-situ optical oxygen analyzer designed for continuous oxygen measurement in high-pressure process gas applications. It measures oxygen from 1 ppm to 100% O2, operates at process pressures up to 350 barg and provides fast T90 response below 5 seconds.
MOD-1040 is suitable for hydrogen, natural gas, refinery gas, petrochemical gas, flare gas, biogas and hydrocarbon process gas applications. With ATEX, IECEx and SIL 2 certification, it supports hazardous-area and safety-related applications where reliable oxygen measurement is critical.
- Industrial oxygen analyzer for process gas applications
- Direct in-situ optical oxygen measurement
- Measurement range from 1 ppm to 100% O2
- Process pressure up to 350 barg
- Fast T90 response below 5 seconds
- Suitable for hydrogen, natural gas and hydrocarbon process gas
- ATEX, IECEx, ECAS-Ex and SIL 2 certified
Request information about MOD-1040 Oxygen Analyzer
Oxygen Analyzer Selection Considerations
Before selecting an oxygen analyzer, the application should be reviewed carefully. Important parameters include oxygen measurement range, gas composition, process pressure, temperature, sample moisture, H2S or hydrocarbon content, required response time, hazardous-area classification, installation method and integration with DCS, PLC or SCADA systems.
Modcon can review the process conditions and recommend the most suitable oxygen analyzer configuration, installation approach and integration method for the application.
Automatic Compensation and Field Maintenance
MOD‑1040 automatically compensates the oxygen measurement for changes in process pressure and temperature. This is particularly important in high-pressure gas applications where operating conditions can vary during start-up, shutdown, compression or changes in production rate. Calibration, diagnostics and routine maintenance can be performed directly in the field using a portable service device. An optional calibration manifold allows calibration gas to be introduced without removing the analyzer from its installed position.
Related Process Analyzer Solutions
- Process analyzers
- Process gas analyzers
- MOD-1040 Oxygen Analyzer
- MOD-1060 Hydrogen Analyzer
- Analyzer systems and shelters
- Modcon.AI industrial optimization
Oxygen Analyzer Technical Downloads
Download technical documents for oxygen measurement in industrial process gas applications, including the MOD-1040 in-situ oxygen analyzer for hydrogen, natural gas, refinery gas and hydrocarbon process gas.
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Frequently Asked Questions
What is an oxygen analyzer used for?
An oxygen analyzer is used to measure oxygen concentration in gas streams. In industrial process applications, it helps support process safety, gas quality monitoring, contamination detection, equipment protection and process control.
Where are industrial oxygen analyzers used?
Industrial oxygen analyzers are used in hydrogen production, natural gas processing, refineries, petrochemical plants, flare gas systems, biogas upgrading, hydrocarbon process gas and industrial gas applications.
What is the difference between an in-situ and extractive oxygen analyzer?
An extractive oxygen analyzer measures a gas sample after it has been removed from the process and conditioned. An in-situ oxygen analyzer measures oxygen directly at the process location, reducing sample transport delay and simplifying the analyzer system.
Can an oxygen analyzer be used in hydrogen production?
Yes. Oxygen analyzers are used in hydrogen production to monitor oxygen contamination, support process safety and maintain gas quality. MOD-1040 is suitable for oxygen measurement in high-pressure hydrogen applications.
What oxygen measurement range does MOD-1040 provide?
MOD-1040 measures oxygen from 1 ppm to 100% O2 on a single analyzer platform.
Is MOD-1040 suitable for hazardous areas?
Yes. MOD-1040 is certified for ATEX and IECEx hazardous-area applications and is SIL 2 certified for safety-related use.