Controlling Oxygen Content in Natural and Industrial Gases

Natural and Industrial Gases

Ensuring Quality and Safety

Analytical Industries' electrochemical oxygen analyzers are easy to use, offer excellent reliability in demanding industrial environments, and are available as portable instruments or as fixed installation for spot-checking processes.

Gas Purity (Trace O2)

In air separation plants and many other industries, such as food and beverage or electronics, the goods produced or processes must be isolated or protected from the oxygen present in the atmosphere as it is an unwanted contaminant. Analytical Industries analyzers are available with ultra-low ranges of only few parts per billion O2 for trace impurity detection and measurement.

Oxygen Purity

Yearly, over 100 million tons of O2 is extracted from the air for industrial purposes and over half of this amount is used by the steel industry. The remaining industrially produced oxygen is used by the water treatment, medical, aerospace, metal-working, and chemical industries. With ranges as high as 95–100% O2, Analytical Industries analyzers are employed to guarantee the purity of oxygen in both production and at point of use.

Features

  • Designed for low cost and simple maintenance
  • Multiple measurement ranges for improved process control
  • Easy-to-use HMI is common to all models
  • Long-life sensor cells optimized for desired operating range

Fixed Ambient Oxygen Deficiency Monitors with Alarms

GPR-35, GPR-2500 SN (ATEX), GPR-2800 IS

The GPR2500 SN, GPR-2800 IS, and GPR 35 are reliable instruments for measuring the concentration of oxygen in rooms where there is potential for gas leaks, or which are regularly flooded with gas to ensure personnel safety.

  • 32 month sensor life for reduced maintenance
  • Assures safety of personnel

Fixed Ambient Oxygen Deficiency Monitors with Alarms

Nitrox Analyzers for Welding

Analytical Industries-3000 Series, Palm O2

Nitrox analyzers are low-cost, easy to use, suitable for welding applications, and work on boats. Analytical Industires galvanic sensors have a long life span.

  • Extended battery life
  • Up to 18 months of sensor life

Nitrox Analyzers for Welding

Oxygen Analyzer with Remote Sensor

GPR-2900 and GPR-1900

Panel-mounted oxygen analyzer with remote sensor enables flexible installation. The device is stable and easy to maintain, allows simple sensor exchange, and detects percent and trace oxygen.

  • Accuracy of better than 2% of range
  • Measurement ranges from 0–1 ppm up to 0–100% O2

Oxygen Analyzer with Remote Sensor

Oxygen Analyzers for Industrial Gases

GPR-3100, GPR-2600, GPR-1600

These are industrial gas analysis instruments that can detect oxygen concentrations from trace to pure states. They can be easily operated and include advanced high-performance oxygen sensors from Analytical Industries. The instruments enable rack and panel installations and have a common menu structure.

  • Sensor life of 24 months
  • Highly accurate to 0.02%
  • XLT sensor for use in CO2

Oxygen Analyzers for Industrial Gases

Oxygen Analyzers for Ultra-High Purity Gases

PI2-MS 500/1000 and PI2-UHP 50/100

These are parts per trillion oxygen analyzers for high purity gases. The high stability Pico-Ion sensors are cost-effective and offer low cost of ownership.

  • Quick recovery from process upsets
  • LDL to below 100 ppt

Oxygen Analyzers for Ultra-High Purity Gases

Oxygen Monitors for Glove Boxes and Nitrogen Generators

GPR-2500 GB and GPR-1500 GB

Oxygen monitors are used for glove boxes and detect percent range to low oxygen levels down to PPM. They are easy to maintain and offer low cost of ownership.

  • XLT sensor for high CO2 backgrounds
  • Flexible, simple installation options

Oxygen Monitors for Glove Boxes and Nitrogen Generators

Portable Oxygen Analyzers for Purity Measurements

GPR-3500 and GPR-1200

Portable oxygen analyzers are employed for applications where gas purity or trace oxygen must be controlled at defined measurement points using sophisticated high accuracy measurements.

  • Low maintenance up to 32 months sensor life
  • Up to 30 days use on a single charge

Portable Oxygen Analyzers for Purity Measurements

Portable Oxygen Analyzers from 0.1 ppm up to 100% Oxygen

GPR-3500 MO, GPR-2000, GPR-1100, and GPR-1000

Portable trace oxygen analyzers are easy to use, reliable, cost-effective, and maintenance-free for 24 months. They are suitable for various background gases and industrial gas purity measurements, and measure in ppm and percent ranges.

  • Up to 30 days operation on a single charge
  • Lightweight and compact – 2.5 kgs

Portable Oxygen Analyzers from 0.1 ppm up to 100% Oxygen

Trace Oxygen Analyzer: Sample Panel or Wall-Mounted

GPR-1500 Series

The wall-mounted oxygen analyzer is integrated with long-life sensors and requires less maintenance. Other benefits include trace oxygen ranges, ATEX approved gas analysis, and NEMA enclosures.

  • XLT sensor for use in pure CO2 backgrounds
  • User-configurable measurement ranges

Trace Oxygen Analyzer: Sample Panel or Wall-Mounted

Wall-Mounted Percent Oxygen Analyzer

GPR-2500 Series

Percent oxygen analyzer GPR 2500 series provides stable oxygen measurement. It enables simple operation with long maintenance intervals, wall installation in general purpose and hazardous areas.

  • Range of choices to suit applications
  • Simple installation and maintenance

Wall-Mounted Percent Oxygen Analyzer

Controlling Oxygen Levels in Natural Gas

Controlling Oxygen Levels in Natural Gas

Apart from the need to meet the regulatory needs for gas quality, there are several reasons why oxygen is unwanted in natural gas:

  • Oxygen in adequate quantities and with a heat source can lead to explosions
  • Oxygen combines with other chemical gases, particularly H2S, to form acids
  • Oxygen can degrade some mercaptans reducing the effectiveness of these odorants in the gas
  • Oxygen degrades amine, which hinders the process of removing H2S and carbon dioxide from the gas chemically
  • Oxygen does not add to the BTU value of the gas and is not an advantage
  • Oxygen speeds up corrosion in the mechanical components that come in contact with the gas

This article discusses several oxygen measurement techniques available, as well as their advantages and drawbacks.

Catalyst Protection

Application/Service Measurement Gas Stream Suggested Analyzer
Protection of catalyst and regeneration beds 0-10 ppm O2 CH4, CO2, H2S GPR-1200
GPR-1100

Spot Checking
GPR-3500 MO

 

Natural Gas Extraction

Application/Service Measurement Gas Stream Suggested Analyzer
Continuous analysis of vacuum extraction techniques create the possibility of O2 contamination that exceed contractual limits. 0-100 ppm O2 CH4, CO2, H2S
H2S Sample System required
GPR-1500 AIS

Spot Checking
GPR-1200
GPR-1100

 

Prevention of Pipeline Corrosion

Application/Service Measurement Gas Stream Suggested Analyzer
Corrosion in gathering lines (air, H2O, H2S react to form sulfuric acid 0-100 ppm O2 CH4, CO2, H2S GPR-1200
GPR-1100

 

This information has been sourced, reviewed and adapted from materials provided by Analytical Industries Inc.

For more information on this source, please visit Analytical Industries Inc.

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