Series 2000

Percent Oxygen Analyzer

Unmatched Reliability, Technology & Value

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

Our Alpha Omega Instrument Series 2000™ Percent Oxygen Analyzer are rugged, microprocessor-controlled instruments designed for continuous or intermittent measurement of trace oxygen concentrations ranging from 0-1% to 0-100%.  Single and three range instruments are available. Auto-ranging is a standard feature on all three range analyzers. It is powered from 115/230 VAC, 50-60Hz, or 18- 32 VDC. Oxygen values are displayed continuously on an easy-to-read, 0.4″ (10.2 mm) high, 4-1/2-digit liquid crystal display (LCD). The instrument can be purchased in a variety of general-purpose mechanical configurations ranging from a benchtop, wall mount or panel mount configuration.  One-quarter inch stainless steel compression fittings are available upon request at no additional charge.  It is available for purchase on our online store.

The Series 2000 Percent Oxygen Analyzer features an extended life oxygen sensor with EES (enhanced electrolyte system). This sensor provides exceptional performance, accuracy, and stability. For applications where carbon dioxide is present in the sample gas, the EES retards passivation of the sensor anode by allowing the products of oxidation to dissolve in the electrolyte. In effect, the sensor is renewed continuously, resulting in an increase in sensor life even if exposed to 100% carbon dioxide. In addition, the enhanced mechanical design of the sensor ensures longer life and virtually eliminates leakage of electrolyte, a nagging (and expensive) problem associated with sensors that require periodic electrolyte maintenance.

The eloquence of the Series 2000 Percent Oxygen Analyzer is its ease of use. The front panel contains five switches that provide access to the instrument’s settings. Each analyzer is equipped with three oxygen alarm relays and one status alarm relay as standard equipment. All four relays are Form C (SPDT) types rated at 10 amps at 115/230 VAC and 30 VDC. Each relay is user configurable for fail-safe operation. In addition to the alarm relays, the analyzer is equipped with a built-in audible alarm, as well as three front panel LEDs for visual indication of an alarm condition.

The Series 2000 Percent Oxygen Analyzer comes equipped with two analog outputs, 4-20 mADC and 0-2 VDC, for use with recorders, data loggers, etc. For enhanced communications, the Series 2000 Percent Oxygen Analyzer can be configured with optional RS-232C or RS-485 serial communications. The RS-485 format is capable of sending digital signals over greater distances and controlling each monitor using the same communication channel.  Depending on the application, the Series 2000 can be equipped with a number of options including sample filters, sample pumps, pressure regulators, serial communications, flow meters, etc.


  • Extended Life Oxygen Sensor with EES:  Ensures trouble-free and cost-effective operation with a useful life of up to four years.
  • Acid Gas Resistant Sensor:  Save thousands of dollars versus other manufactures.
  • Numerous Mechanical Configurations: NEMA 1 general purpose enclosure available in either a benchtop, wall mount or panel mount configuration.
  • Single and Three Range Options:  Measure tenths of percent to 100%
  • Visual and Audible Alarms Included along with two analog recorder outputs:  Ensures the highest level of protection and reliability.
  • Factory Calibration:  A factory Certificate of Performance Verification and Calibration is included at no additional charge. The product performance is verified in accordance with manufacturing specifications using a National Institute of Standards and Technology (NIST) traceable transfer calibrated standard gas mix.


  • Measurement Ranges: (Percent Oxygen) Single Range 0-100 0-25 Three Range 0-10/25/100 0-5/10/25 0-1/10/25
  • Accuracy: ±1% of full scale (± 5% on the 0-1% range) – stated at constant temperature and constant pressure
  • Linearity: ±1%
  • Response Time: 90% of full-scale response in less than 20 seconds (typical)
  • Sensor Type: Ambient Temperature Electrochemical Sensor with EES
  • Temperature Compensation: Standard
  • Pressure Compensation: Standard
  • Operating Temperature: 40° to 104° F (5° to 40°C) <40°F (<5°C) use heated sensor enclosure >104°F (>40°C) cooling of sensor required
  • Warranty: 2 years electronics/1years sensor


  • Electronics Control Unit: Polycarbonate with a hinged clear front cover – other mechanical configurations available-consult factory
  • Gas Connections: Quick connect for 1/4” OD flex tubing or optional 1/4” stainless steel compression fittings
  • Sensor Mounting: Local or optional remote mounting
  • Dimensions: Length: 9.45 in (240.5 mm), Width: 6.50 in. (165.1 mm), Depth: 6.20 in. (157.5 mm)
  • Weight: 11 lbs (4.98 kg) bench-top configuration


Need help?  Complete our Oxygen-Application-Questionnaire.


Need service on your AOI oxygen analyzer?  No problem.   We are ready to assist you with any technical or service-related inquiries.  Just complete our Oxygen Monitor RMA.

Percent Oxygen Analyzer with Excellent Speed of Response & Low Cost of Ownership

Process Insights_AOI_Series 2000 oxygen 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


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

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Series 3520™

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Series 2520™

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