SO-E2-960 working principle of zirconia oxygen sensor for 1. oxygen generator: 

BecauseThe carriers for the current in the zirconia electrolyte are oxygen ions, so when a voltage is applied to the zirconia cell, oxygen is drawn through the zirconia disk to the anode. If a perforated cover is added to the cathode of the electrolytic cell, the oxygen flows to the cathode. The rate will be limited. Limited by this rate, the current in the cell will reach saturation as the applied voltage is gradually increased. This saturation current is called the limit current, which is concentrated with oxygen in the surrounding environment. proportional to the degree.

SO-E2-960 of Zirconia Oxygen Sensor for 2. Oxygen Making MachineApplication:
Medical: oxygen concentrator, Constant temperature box, oxygen generator
Laboratory: inert gas treatment cabinet (glove box), bacteria incubator
Food industry: packaging, food inspection, Monitor fruit ripening process(Storage/Transportation)

Family/Cooking: Automated baking/Baking (high temperature>100℃）

Measurement technology: fixed/Portable oxygen meter, Measurement, air conditioning and circulation with controlled oxygen content

security technology/Monitoring: fire protection (nitrogen addition, e.g. server room), greenhouses, wine cellars, gas storage, refineries, diving, fermentation units

Electrical industry: inert gas processors and cabinets, Inert gas welding monitoring, Storage with increased nitrogen (oxidation protection), drying equipment, nitrogen concentrator, exhaust gas measurement
 
SO-E2-960 of Zirconia Oxygen Sensor for 3. Oxygen Making MachineAdvantages of oxygen sensors: 
Wide measurement range,1%~96%Oxygen
High precision
Multiple models have linear characteristics
Small temperature dependence of sensor signal
Low cross sensitivity
Long service life
In most cases, it only needs to be done once.“Single point calibration”

SO-E2-960 of Zirconia Oxygen Sensor for 4. Oxygen Making MachineCharacteristic data: