SO-A0-050 Limiting Current Type Zirconia Oxygen Sensor Operational Principle
When voltage is applied to a zirconia electrolyte cell, oxygen is pumped through the zirconia disc from the cathode side to the anode side because the carriers of the current flowing through the zirconia electrolyte are oxygen ions. By attaching a cap with a pinhole on the cathode side of the cell and by increasing the voltage over the cell the current shows saturation due to the rate limiting step in the transfer of oxygen to the cathode. This saturation current is called limiting current and is nearly proportional to the ambient oxygen concentration.

SO-A0-050 TO39 Housing, ø 9.2 mm; H= 6.4 mm; pin distance 3.59 mm.
 

Below the advantages of the Zirconia Oxygen Sensor SO-A0-050:
• Measuring range 0.05 to 5 vol.% oxygen
• High accuracy
• For many types a more or less linear characteristic
• Small temperature dependence of the sensor signal
• Low interference with other gases
• Long service life
• In many cases "Single point calibration" necessary only once

SO-A0-050 Limiting Current Type Zirconia Oxygen Sensor Applications:
Medical
  • Oxygen Concentrators
  • Incubators
Laboratory
  • Inert gas processing cabinets (Glove boxes)
  • Incubators (controlled bacterial growth)
Food industry
  • Packaging
  • Controlled food testing
  • Monitoring fruit ripening processes (storage / transport)
Household/Gastronomy
  • High-temperature humidity measurements (> 100°C) for baking / roast automation
Measuring technique
  • Oxygen Meters (stationary / portable)
  • Measurements under controlled O2 content
  • Air conditioning and ventilation 
Security technology/Monitoring
  • Fire protection (increased N2 atmosphere e.g. Server rooms)
  • Greenhouses, wine cellar
  • Gas storage, refineries
  • Diving
  • Fermentation units
(Electrical-) industry
  • Inert gas processing machines and cabinets
  • Inert gas welding monitoring
  • Storage with increased N2 atmosphere (oxidation prevention)
  • Drying units
  • Nitrogen concentrators
  • Exhaust gas measurement
 

SO-A0-050 Limiting Current Type Zirconia Oxygen Sensor Characteristic Data: