+1 610.524.8800

Trace to Percent O2  |  PPB to 100% Range

Model OA-1S+

Portable/ Benchtop Series
Internal ZR100 Sensor

The Neutronics Model OA-1S+ is a portable analyzer that accurately measures oxygen in the range of 50 ppb to 100%.  Featuring the Neutronics rapid response zirconia oxide sensor with its extremely fast response and high accuracy, the Model OA-1S+ can be exposed to air and quickly read ppb oxygen in a variety of background gases, including Nitrogen, Argon, and Helium.  The OA-1S+ is designed to measure oxygen concentrations in clean gases that do not contain hydrocarbons or carbon monoxide.

  • Sensor: Rapid-response zirconium oxide ZR100 
  • Measurement Range: 75 PPB to 100% 02; analyzer auto-ranges between PPB, PPM, and %
  • Accuracy: up to 100 PPB, ±5% of reading; 101 to 999PPB, ±2% of reading; 1,000 PPB to 99.9%, ±2% of reading
  • Response Time (step change): T90 < 5 seconds (at 1 lpm sample flow rate)
  • Recovery Time: < 5 seconds from room air to 0.1%; < 5 minutes from room air to 1 PPM; < 30 minutes from room air to 75 PPB
  • Sample Pressure: 25 to 60 psig
  • Sample Flow Rate: 1 to 5 lpm
  • Warm-up Time: 20 minutes
  • Operating Temperature: 0 to 50°C
  • Power: 110/220VAC, 50/60 Hz, single phase
  • Serial Service Port: RS-232
  • Analog Voltage Output: 0-1VDC, ±0.5
  • Analog Current Output: 4-20mA, loop powered, negative ground
  • Dimensions: 13.55” L x 9” W x 9.15” L (344mm x 229mm x 232mm)
  • Weight: 8.5 lb (3.9 kg)
  • PPB to 100% measurement range
  • Rapid-response Neutronics zirconium oxide sensor
  • Electropolished SS tubing and orbital weld fittings
  • Unaffected by position or motion
  • 5 to 7 year sensor service life