Oxygen Sensor for Legacy Pro O2 & C-Squared Analyzer


The D-13 oxygen replacement sensor has a three-prong plug that fits legacy Nuvair Pro O2 and C-Squared oxygen analyzers with a threaded faceplate insert.


Please check the product number ("type") of your analyzer's sensor before ordering. Be careful not to confuse the D-13 replacement sensor with the D-31 carbon monoxide (CO) replacement sensor.

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.


Warranty 0 – 12 Months Free Replacement
13 – 18 Months 50% Off Replacement
19 – 24 Months 25% Off Replacement