Oxygen Monitors

Unmatched Accuracy & Value

If you are concerned over unsafe levels of oxygen explore a complete line of oxygen deficiency monitors for high purity applications.  Our Alpha Omega Instruments oxygen monitors have been serving the semiconductor and industrial gas market for decades.  We supply many instruments for semiconductor, clean rooms, glove box environments, medical, aerospace, and municipality applications.

Precision market-leading trace and percent oxygen analyzers and transmitters that protect your process, plant and personnel

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%. Auto-ranging is a standard feature on all three range analyzers. The Series 2000 Percent Oxygen Analyzer is powered from 115/230 VAC, 50-60Hz, or 18-32 VDC and comes equipped with two analog outputs, 4-20 mADC and 0-2 VDC. Optional sample path configurations are available.

The Series 2500 and 2510 Percent Oxygen Transmitters are blind transmitters designed to provide exceptional performance, accuracy, and stability. Percent oxygen measurement ranges are available from 0-2% to 0-100%. A 4-20 mADC analog output is provided. The Series 2500 Trace Oxygen Transmitter is a true loop powered (14-32 VDC) transmitter. The Series 2510 Percent Oxygen Transmitter is available in either AC powered (115 or 230VAC, 50-60Hz) or 24VDC. Optional sample path configurations are available.

The Series 1300 Oxygen Deficiency Monitor has an extended life electrochemical sensor with optimized Enhanced Electrolyte System (EES). As a result of EES, Alpha Omega Instruments is able to offer an unparalleled three (3) year sensor warranty. The standard measuring range of the monitor is 0-30%. Alpha Omega Instruments’ exclusive Advanced Digital Interface (ADI) offers the capability to expand the Series 1300 with up to
three oxygen sensors.


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


  • Trace oxygen analyzers
  • Percent oxygen analyzers
  • Portable oxygen analyzers
  • Oxygen deficiency monitors

Reliable Oxygen Deficiency Monitors Equals Safety

Oxygen deficiency monitors are critical anywhere low oxygen levels in normal air can happen. If oxygen levels continuously drop eventually the room air simply cannot support life.  This is a very dangerous situation.  Explore our reliable oxygen deficiency monitors with accurate sensors, percent level displays, and audible and visual safety alarms.  You can trust our monitors to deliver reliable and accurate measurement. 

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. asy to carry and transport, it senses oxygen changes in seconds.

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Cost-Effective Safety & Process Monitors and Oxygen Deficiency Monitors with Low Maintenance, High Reliability and Accuracy


  • Aerospace/Govt.
  • Bioreactors
  • Bioresearch
  • 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


  • Improved reliability
  • Low cost of ownership 
  • Meet compliance requirements
  • Backed by global service and support

Process Insights is committed to solving our customers’ most complex analytical and process challenges.  


Americas +1 713.947.9591
EMEA +49 69 20436910
China/APAC +86 400 086 0106


Our Oxygen Monitors for High Purity Applications

Series 1300™

Alpha Omega Instruments Oxygen Deficiency Monitor

Process Insights_AOI 1300 oxygen deficiency monitor

Series 3000™

Alpha Omega Instruments Trace Oxygen Analyzer 0-1 PPM to 0-10,000 PPM

Process Insights_AOI_Series 3000_ Trace Oxygen Analyzer

Series 3500/3510™

Alpha Omega Instruments Trace Oxygen Blind Transmitter 0-10 PPM to 0-20,000 PPM

Process Insights_AOI Series-3510 blind transmitter

Series 3500/3510™ EX

Alpha Omega Instruments Trace Oxygen Blind Transmitter Explosion Proof 0-10 PPM to 0-20,000 PPM

Process Insights_AOI_35003510 Explosion Proof Transmitter

Series 3520™

Alpha Omega Instruments Portable Battery-Operated Trace Oxygen Analyzer

Process Inisghts_AOI_Series 3520_portable oxygen analyze

ZRO 2000™

Alpha Omega Instruments Trace Zirconia Oxygen Analyzer PPM to 100%

Process Insights_AOI ZRO 2000 oxygen analyzer


Alpha Omega Instruments Percent Oxygen Analyzer 0-100% and 0-25%

Process Insights_AOI-OXY-SEN oxygen analyzer

Series 2000™

Alpha Omega Instruments Percent Oxygen Analyzer 0-1 to 0-100%

Process Insights_AOI_Series 2000 oxygen analyzer

Series 2500/2510™

Alpha Omega Instruments Percent Oxygen Transmitter 0-2% to 0-100%

Process Insights_AOI_ Series 2510-Percent-Oxygen-Transmitter

Series 2520™

Alpha Omega Instruments Portable Percent Oxygen Analyzer 0-5, 0-10, 0-25, 0-50, and 0-100%

Process Insights_AOI_Series 2520 portable oxygen analyzer

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