Sensor for AN300 Nitrogen Analyzer


The N-33 is the replacement sensor for the AN300 Portable Nitrogen Analyzer. 


The N-33 is a replacement electrochemical oxygen sensor for gas analyzers. Under normal use, oxygen sensors have an expected service life of 36 months. The N-33 replacement sensor fits the following analyzers:

  • AN300 Portable Nitrogen Analyzer

WARNING: Never expose gas sensors to pressure or you may cause damage and/or false readings. Damaged sensors will not provide accurate gas analysis. Most gas analyzers can be used to analyze a regulated gas sample flow, the contents of a gas cylinder, or the flow from a regulator. The flow rate of gas must equal 1-5 L/min. To produce this flow, a Flow Restrictor and Regulator may be required. A faulty Flow Restrictor can lead to a false analyzer reading. Flow Restrictors should be regularly tested with a Flow Meter. Inaccurate gas analysis can lead to serious personal injury or death.


Output 10±3 mV in air at 25°C/77°F, sea level
Electrical Connector Mating plug: Molex (PN 22-01-3037 or 22-01-2037)
Range 0–20.9% oxygen (79.1–100% nitrogen)
Accuracy Within ±1% of full scale at constant temperature and pressure when calibrated with air (20.9% oxygen)
Shelf Life 24 months
Expected Sensor Life 36 months in air at 77°F (25°C) and 50% rh
Response Time <6 seconds for 90% of final value
Operating Temperature 32–104°F (0–40°C)
Storage Temperature 32–122°F (0–50°C)
Humidity 0–99% rh (non-condensing)
Weight 1 oz (28.3 g)
Temperature compensation error is ±5% of full scale over the operating temperature range. Worst case tracking error (within the first hour after a maximum temperature step) is ±10% of full scale. (Gas samples must be brought to ambient temperature) Percent readout is only within ±1% at constant pressure (e.g. a 10% increase in pressure will result in a 10% increrase in full scale).
Warranty 0 – 12 Months Free Replacement
13 – 18 Months 50% Off Replacement
19 – 24 Months 25% Off Replacement

ORDERING INFORMATION: All sales are final. Due to the nature of this item it is non-returnable. Nuvair does not normally stock this item and/or its components. Any cancellation of an order, once confirmed, will not be accepted by Nuvair. Make sure you definitely want this item before placing your order.