Series 2500/2510

Percent Oxygen Transmitter

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 2500/2520™ Looped-Powered 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%. The Series 2500/2510™ Trace Oxygen Transmitter is a true loop powered (14-32 VDC) percent oxygen transmitter designed to provide accurate and dependable percent oxygen measurements in a variety of background gases.  Measurement ranges available are from 0-2% to 0-100%. It is available for purchase on our online store.

The Series 2500/2510 enclosure is made from durable polycarbonate and is rated for NEMA 4 (IP 66) service (may change with the addition of certain optional equipment).  A 4-20 mADC output is provided that can be used with a data logger, recorder, PLC, DCS, etc. Options include pressure regulators, flow meters, sample filters, and explosion proof (NEMA 7) housings.  It is AC powered (115/230 VAC, 50-60 Hz) counterpart to the Series 2500/2510 and is recommended when AC power is available or preferred. Also, available in optional 24VCD. : In addition to the optional equipment mentioned above, the Series 2500/2510 can be equipped with sample pumps and flowmeters.

The Series 2500/2510 Percent Oxygen Transmitters feature 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.


  • 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.
  • Wide Number of Ranges:  Measure from <0.1% to 100% Oxygen
  • Exceptional Speed of Response:  Responds Instantaneously to Changes in Oxygen
  • Rugged and Versatile Construction:  NEMA 4 Housing Withstands Harsh Environments
  • Economically Priced:  Save Thousands of Dollars vs Other Methods
  • Patented Extended Life Sensor:  Eliminates Frequent Sensor Replacement
  • Acid Gas Resistant Sensor:  Eliminates Sample Conditioning for Many Applications


  • Measurement Ranges: in percent 0-2, 0-5, 0-10, 0-25, 0-50, and 0-100
  • Accuracy¹: ±1% of full scale (± 5% of full scale on ranges ≤ 0-5%)
  • Linearity: + 1% of full scale.
  • Response Time: 90% of full scale in less than 20 seconds (typical).
  • Sensor Type: Long-life Electrochemical Sensor.
  • Temperature Compensation: Standard.
  • Operating Temperature Range: 40° to 104°F (5° to 40°C)
  • Warranty: Two years for the electronics and one year for the sensor.


  • Enclosure: Polycarbonate, rated NEMA 4X (IP66) without optional equipment. NEMA 7 (explosion proof) optional.
  • Dimensions: 6.5 in. (165.1 mm) height 7.0 in. (177.8 mm) width 3.9 in.(99.06 mm) depth. Note: All dimensions are without optional equipment
  • Gas Connections: Quick connect 1/4” OD for plastic tubing or stainless-steel compression fittings for installations with metal sample lines.


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 2510-Percent-Oxygen-Transmitter


  • 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

Our Oxygen Monitors 

Series 1300™

Alpha Omega Instruments Oxygen Deficiency Monitor
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Series 3000™

Alpha Omega Instruments Trace Oxygen Analyzer 0-1 PPM to 0-10,000 PPM
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Series 3500/3510™

Alpha Omega Instruments Trace Oxygen Blind Transmitter 0-10 PPM to 0-20,000 PPM
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Series 3500/3510™ EX

Alpha Omega Instruments Trace Oxygen Blind Transmitter Explosion Proof 0-10 PPM to 0-20,000 PPM
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Series 3520™

Alpha Omega Instruments Portable Battery-Operated Trace Oxygen Analyzer
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ZRO 2000™

Alpha Omega Instruments Trace Zirconia Oxygen Analyzer PPM to 100%
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Alpha Omega Instruments Percent Oxygen Analyzer 0-100% and 0-25%
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Series 2000™

Alpha Omega Instruments Percent Oxygen Analyzer 0-1 to 0-100%
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Series 2520™

Alpha Omega Instruments Portable Percent Oxygen Analyzer 0-5, 0-10, 0-25, 0-50, and 0-100%
rocess Insights_AOI_Series 2520 portable oxygen analyzer

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