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OA-1 Portable Trace Oxygen Analyzer

OA-1 Portable Trace Oxygen Analyzer

The Neutronics Model OA-1 is a portable analyzer that accurately measures oxygen in the range of 0.1 ppm to 100%. Featuring the Neutronics rapid response zirconium oxide sensor with its extremely fast response and high accuracy, the Model OA-1 can be exposed to air and within seconds read ppm oxygen in a variety of background gases, including nitrogen, argon, and helium. The OA-1 is designed to measure oxygen concentrations in clean gases that do not contain hydrocarbons or carbon monoxide.


The robust design of the Neutronics zirconium oxide sensor gives this analyzer the ability to rapidly measure oxygen through large step changes in concentration and the ability to accurately measure ppm concentrations of oxygen within seconds after exposure to air. When heated to an elevated temperature, the rapid-response zirconium oxide sensor produces a predictable electrical output in response to changes in the partial pressure of oxygen. The sensor is a solid-state device that utilizes yttria-stabilized zirconium (YSZ).

  • PPM to 100% measurement range
  • Rapid-response Neutronics zirconium oxide sensor
  • Suitable for a wide range of operating gas temperatures
  • Less than 15 seconds from air to 50 ppm
  • 5 year sensor life with no regular service required
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OA-1 Portable Trace Oxygen Analyzer
OA-1 Portable Trace Oxygen Analyzer
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1 to 100 ppm @ ± 5.0% 101 ppm to 99.9% @ ± 2.0%
Ambient Temperature
32 to 122°F (0 to 50°C)
Analog Communication
Serial RS-232Analog 0 - 1V ±5% and 4-20 mA
Display Size
3 digit LED for O2.Dot matrix for diagnostics
Enclosure Rating
NEMA 4 (IP66) Faceplate
Expected Sensor Service Life
>5 Years
0 to 90% RH (non-condensing)
Measuring Range
auto 0.1 ppm to 100% O2
110/220 VAC ±20% 50/60 Hz
Product Dimensions (L×W×H)
13.55" × 9" × 9.15" (34.29 × 22.86 × 23.24 cm)
Product Weight
8.5 lbs
Relay Rating
2 @ 5A/220VAC rated
Response Time
T95< 3 sec at 1 l/min sample T90< 5 sec below 999 ppm
Sensor Type
Zirconium Oxide ZR-100
1 Year
Approvals subject to change without notice and may differ based on configuration, part number and/or country. Contact Customer Service or check approval label on product for specific approval information.
Part Number(s)

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