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超高純度（UHP）ガス供給配管における微量酸素の監視

超高純度（UHP）ガス供給配管における微量酸素の監視

Continuous Purity Verification Across UHP Gas Distribution Networks — OMD-675

Ultra-high-purity gas distribution pipelines carry nitrogen, argon, and specialty gases across a facility or industrial park, and purity can be affected at any point along the run by fittings, welds, or valve connections. Continuous trace oxygen monitoring at strategic points along the distribution pipeline confirms gas quality is maintained from source to destination.

The OMD-675 trace oxygen analyzer gives UHP gas distributors continuous, highly sensitive monitoring along pipeline networks, supporting purity assurance across long-distance and multi-point distribution systems.

  • UHP Pipeline QC
  • Distribution Network Monitoring
  • Continuous Online Monitoring
  • Sub-PPM Sensitivity

Why UHP Pipeline Monitoring Matters

A UHP distribution pipeline is only as good as its weakest connection point, and oxygen ingress can occur gradually at welds, fittings, or valves that degrade over time. Continuous monitoring at multiple points along the pipeline lets operators confirm purity is maintained across the full distribution run and quickly localize a contamination source if purity drops at a downstream point.

Where It's Used

  • Pipeline receipt and delivery points — verifying purity entering and leaving the distribution network
  • Long-distance distribution runs — monitoring at intermediate points to localize contamination
  • Multi-customer or multi-building distribution — confirming purity at each branch connection
  • Pipeline commissioning and leak testing — validating purity before a new segment enters service

Recommended Analyzer

OMD-675 Ultra-Trace Oxygen Analyzer

The OMD-675 delivers stable, continuous trace oxygen measurement suited to monitoring along UHP gas distribution pipelines of any length.

Multiple units can be deployed at receipt, intermediate, and delivery points to build a complete purity profile of the distribution network from a single monitoring platform.

  • Continuous Trace O2 Output
  • Multi-Point Deployment
  • 4-20 mA / Digital Output
  • Pipeline-Rated Enclosure

主な仕様

  • Range: sub-ppm to low-ppm trace oxygen, matched to UHP distribution specifications
  • Sensor technology: stable, low-drift sensor suited to continuous pipeline duty
  • Output: 4-20 mA and digital communication for distribution monitoring system integration
  • Response time: suited to real-time monitoring across distribution checkpoints
  • Enclosure: weatherproof, process-rated housing for pipeline installation

よくある質問

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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