Oxygen Analysis for Catalytic Converter Efficiency Testing
Pre- & Post-Catalyst Oxygen Measurement for Converter Performance Evaluation — OMD-190
Evaluating catalytic converter efficiency typically involves comparing exhaust gas composition before and after the catalyst, and oxygen content is one of the parameters that shifts as the catalyst promotes oxidation and reduction reactions within the exhaust stream. Reliable oxygen measurement at both points supports converter development and efficiency testing.
The OMD-190 gives emissions and catalyst engineers continuous, accurate oxygen measurement at pre- and post-catalyst sample points, supporting converter performance evaluation.
- Catalyst Efficiency Testing
- Pre/Post-Cat Comparison
- Emissions Development
- Continuous Process Monitoring
Why Catalyst Efficiency Oxygen Monitoring Matters
Oxygen levels measured before and after a catalytic converter, alongside other exhaust gas measurements, help engineers characterize how effectively the catalyst is performing its intended oxidation and reduction reactions under varying operating conditions. Continuous, repeatable oxygen measurement at both sample points supports consistent efficiency comparisons across test conditions and converter designs.
Where It's Used
- Pre-catalyst exhaust sampling establishing baseline oxygen content entering the converter
- Post-catalyst exhaust sampling measuring oxygen content after catalytic reactions
- Converter design and development testing comparing efficiency across converter configurations
- Aged and degraded catalyst evaluation assessing efficiency changes over converter lifespan
Recommended Analyzer
The OMD-190 provides stable, continuous oxygen measurement suited to pre- and post-catalyst exhaust sampling in catalytic converter testing.
Deployed at both sample points, the OMD-190 gives engineers directly comparable oxygen data to support catalyst efficiency analysis across test conditions.
- Continuous Process Output
- Dual-Point Sampling Capable
- 4-20 mA Output
- Test Cell-Duty Enclosure
Key Specifications
- Range: 0 – 25% O2, covering typical pre- and post-catalyst exhaust oxygen levels
- Response time: fast enough to track oxygen changes across the catalyst under varying conditions
- Sensor technology: process-grade sensor suited to continuous exhaust gas testing
- Output: 4-20 mA for integration with test cell data acquisition systems
- Enclosure: rugged housing suited to catalyst and emissions test cell environments
Frequently Asked Questions
Trace oxygen measurement provides a direct indication of oxygen contamination or crossover into the hydrogen stream. Trending the oxygen concentration can help operators identify changes in electrolyser or purification system performance.
A common measurement point is the hydrogen product stream downstream of the electrolyser stack. Additional measurement points may be used before or after drying and purification equipment depending on the process design and monitoring objectives.
Alarm and control limits should be determined based on the electrolyser manufacturer’s specifications, process conditions, applicable standards, and the facility’s safety requirements rather than using a universal oxygen alarm value.
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