Model 200



The Model 200 Portable Spot Check O2 Analyzer is a battery-operated, portable oxygen analyzer used for the measurement of residual oxygen in gas blending, enclosed systems, bio reactors or any application where the sample of interest can be introduced to the inlet fitting of the analyzer, where it flows to the sensor. Where no flow is available, the squeeze bulb can be used to to draw sample into the sensor.
Alternatively, the unit can be equipped with the sensor inlet open to the atmosphere and the entire unit placed in a closed system to be monitored for oxygen level. The sensor operation is not sample flow dependent, and accurate results are obtained on both static and flowing samples.


The sensor is a proprietary electrochemical type with a measurement range of 0.1 to 100%. Excellent linearity through the entire range allows a calibration with one set point using room air. It is unaffected by high levels of background gases such as nitrogen or carbon dioxide. The Model 200 can be used for applications where the oxygen level is very high (50 to 100%), without overloading the sensor. It is unaffected by trace hydrocarbons or high levels of CO2, which can poison other types of sensors, and operates independent of flow rate.


The Model 200 is powered by two AA alkaline batteries.

  • Bioreactors
  • Gas Blending Systems
  • Fruit Storage Areas
  • Fermentation
  • Welding Gases
  • Controlled Atmosphere Rooms

  • Analyzes oxygen in all types of applications
  • Range 0.1 to 100% oxygen
  • Portable, battery operated
  • Long-life sensor
  • Inexpensive to maintain and operate
  • Economically priced
  • Calibrates with room air

Technical Specifications
Range 0.1 to 100% Oxygen
Resolution 0.1% Oxygen
Accuracy +-2% of reading
Minimum Detection Limit 0.1%
Drift less than 1% per month
Sensor Electrochemical Cell
Calibration Calibrates with room air; SPAN keypad adjustment on front panel
Calibration Frequency Minimum once per year
Power Supply Two “AA” alkaline batteries;
Size 90 x 40 x 140 mm
Weight 1 lb. (450 gms)
Warranty 2 years, parts and labor
Standards CE, RoHS