Portable Percent Oxygen Analyzer Series 2520

Portable Percent Oxygen Analyzer Series 2520

The Portable Percent Oxygen Analyzer Series 2520 is AOI 2520 analyzer a portable, battery operated percent oxygen analyzer designed for industrial and commercial applications where accurate and reliable spot percent oxygen measurements are needed.

The Series 2520 Portable Percent Oxygen Analyzer is a light-weight, easy-to-use analyzer that provides accurate and repeatable percent oxygen measurements in a variety of gases. The rugged and compact design of the Series 2520 makes it ideal for industrial applications where spot oxygen measurements need to be made.

The Series 2520 can be configured with one of several measuring ranges from 0-1% to 0-100% oxygen. The standard Series 2520 Portable Percent Oxygen Analyzer is equipped with a 3-1/2 digit liquid crystal display, built-in NICAD batteries, and a universal AC adapter that provides the ability to recharge the NICAD batteries even while powering the analyzer from the adapter.

The Series 2520 Portable Percent Oxygen Analyzer features an extended life oxygen sensor with EES (Enhanced Electrolyte System) that provides exceptional measurement 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. The output from the sensor is temperature compensated.

Competitively priced.   


  • 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.
  • State-of-the-Art Sensor Technology:  High Precision Measurements
  • Light Weight/Compact Design:  Easy to Carry and Transport
  • Rapid Speed of Response:  Senses Oxygen Changes in Seconds
  • Built-in NICAD Batteries:  Provides Hours of Continuous Operation
  • Uses Standard NICAD’s:  Replacement Batteries Found World-Wide
  • Minimum Maintenance:  Low Cost of Ownership




  • Measurement Ranges: 0-5, 0-10, 0-25, 0-50, and 0-100%
  • Accuracy: ±1% of full scale (± 5% of full scale on ranges ≤ 0-5%)
  • Linearity: ±1% of full scale
  • Response Time: 90% of full scale in <20 seconds
  • Sensor Type: Electrochemical
  • Temperature Compensation: Standard
  • Operating Temperature Range: 40° to 104°F (5° to 40°C)
  • Warranty: Two years electronics/1 year sensor


  • Display: 3-1/2 digit liquid crystal display
  • Power Source: Rechargeable NICAD batteries with universal (90-240 VAC) AC adapter
  • Analog Output: Not available


  • Sample Flow Rate: 1.0 to 2.0 SCFH (0.5 to 1.0 liters/minute)
  • Sample Gas Pressure Limits: 0.1 to 1.5 psig (0.007 to 0.1 kg/cm2)


  • Enclosure: Polycarbonate-rated NEMA 1
  • Dimensions: 5.8 in. (147.3 mm) Height 6.7 in. (170.2 mm) Width 3.4 in. (86.4 mm) Depth Note: All dimensions are without optional equipment
  • Gas Connections: Quick connect
  • Weight: <2 pounds (<0.907 kg)

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