Model 201 Portable oxygen analyzer

The Quantek Model 201 is a portable oxygen analyzer used primarily for the measurement of O2 concentration in gas flows, chambers, or gas flushed hoods (such as glove boxes).
The analyzer comes with both an “open faced” fitting and a T-fitting, allowing it to be used for analyzing gas flows, or set in chambers where oxygen levels need to be monitored.

The sensor operation is not sample flow dependent, and accurate results are obtained on both static and flowing samples.

SKU: Model 201 Categories: ,
Lead Time: 2-4 business days


The sensor is a proprietary electrochemical type with a measurement range of 0.0 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 201 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 201 comes in two configurations – pick either AA battery operation, or AC power operation to allow for 100% uptime.

Expected Lifetime (oxygen) 4-5 years
Oxygen Range 0.0 to 100%
Oxygen Sensitivity 0.1%
O2 Resolution 0.1%
Analog Output Not Available
Resolution 0.1% Oxygen
Accuracy +/- 0.1% (from 0-20%), +/- 0.2% (from 20% to 50%), +/- 0.5% (from 50% to 100%)
Drift less than 0.4% per year
Oxygen Sensor Type Proprietary Electochemical
Response Time 15 seconds to T95
O2 Sensor Lifetime 4-5 Years
O2 Sensor Body ABS Resin
Sample Connection 1/4 inch plastic slip on
Sample Method Flowing gas required
Sample Pump Not Available
Pump Timing Not Available
Sampling Port 1/4 inch plastic slip on
Minimum Sample Required 10cc
Sampling Assembly Not Available
Oxygen Calibration Controls SPAN adjustment, zero adjustment
Instrument Calibration Calibrates with room air; SPAN keypad adjustment on front panel
Exhaust port Vents to air (T fitting included for recapture of sample gas)
Power Supply Four "AA" alkaline batteries; (optional) 5V power supply
Backup Power Optional 5V power supply
Battery Operation Included
Input Voltage 100-240V, 50-60Hz
Battery Life 2000 hours
Measures: O2, CO2 O2
Form Factor Portable
Size 90 x 40 x 140 mm
Weight 1 lb. (450 gms)
Warranty 2 years, parts and labor
Standards CE, RoHS
Included Consumables Filters, tubing, T-fitting
Options None
Included Documentation Owners manual (includes operating instructions with detailed calibration instructions, calibration certficate, precautions), NIST calibration certificate
Origin of Goods Our goods are manufactured in the U.S.A.
Products by Gas Oxygen
  • 1/4 in ID open inlet fitting (for setting in a chamber)
  • 1/8 in “barbed” T-fitting (to capture gas and keep your system closed)
  • 4 AA alkaline batteries (for battery powered version) OR 5V DC power supply (for power supply version)