Over 25-years, the mission of Alpha Omega Instruments has been to manufacture the highest quality products in our industry. With today’s world economy, conducting business on a global scale offers numerous opportunities and challenges. As diversified as the world markets are, there is one constant-the desire of customers to find effective and economical solutions to their measurement and control needs. Alpha Omega Instruments has the product breadth, application experience, and extraordinary customer care to make the right product recommendations.

Alpha Omega Instruments has a fast-growing primary business group. The Process Analyzer Division consists of trace and percent oxygen analyzers, transmitters and safety monitors. These products are used in commercial, government, and educational institutions around the world.

With our Series 1300, our proprietary Enhanced Electrolyte System (EES) extends the life expectancy of the sensor to years instead of approximately 12 months typical of most “fuel cell type” sensors.  

The OXY-SEN™ Oxygen Monitor is an economical percent oxygen monitoring system equipped with a standard measuring range of 0-100%.  It comes standard with dual 4-20 mADC recorder outputs that are scaled over 0-100% and 0-25% and can operate in harsh atmospheres.  If you need a fast monitor, the OXY-SEN responds instantaneously to changes in O2.

The Series 2000 Percent Oxygen Analyzer is a rugged, microprocessor-controlled percent oxygen analyzer with either single range or three range capabilities from 0-1 to 0-100%.  It has a high tolerance for gases containing up to 100% carbon dioxide.

The Series 2520 Portable Percent Oxygen Analyzer is a battery-operated percent oxygen analyzer designed for industrial and commercial applications where accurate and reliable spot percent oxygen measurements are needed. Easy to carry and transport, it senses oxygen changes in seconds.


  • Electrochemical sensors that last up to 3x longer than “fuel cell” type sensors
  • Percent or trace oxygen readings as low as parts per billion
  • Benchtop, wall mounted and panel mounted options for continuous measurements, portable options for spot measurements
  • NEMA 1 (general purpose) to NEMA 7 (explosion proof) enclosure types
  • Exceptional warranties on sensors and electronics
  • All of our devices are competitively priced.


AOI 1300 gas analyzer


  • Aerospace/Govt.
  • Bioreactors
  • Bio-Research
  • Bulk Industrial Gases
  • Chamber/Glove Box Manufacturers
  • Chemical
  • Chemical Storage
  • Combustion Control
  • Electrical Transformers
  • Fertilizers
  • Fiber Optic Research
  • Landfill
  • Light Bulb Manufacturers
  • Medical
  • Metal/Heat Treating
  • Nuclear & Nuclear Recovery
  • Petrochemical
  • Pharmaceutical
  • Plastics
  • Power Generation
  • PSA & VPSA Processes
  • Research Labs
  • Semiconductor & Ceramics
  • Specialty Gases
  • Synthetics
  • Veterinary Medicine

Field Proven Oxygen Monitoring Solutions

Safety Monitors

TEC Controllers – No Longer Available for purchase

TEC Controller – Series P-1

TEC Controller – Series 860

TEC Controller – Series 850

TEC Controller – Series 800

Questions? We’re here to help.