Zirconia probe is mainly composed of several key components: oxygen potential agent, oxygen ion conductor membrane, electrolyte, conductive temperature element, and shell structure. Among them, the oxygen ion conductor membrane is the core component of the probe, whose performance directly determines the probe's measurement accuracy and response speed.

Oxygen Ion Conductor Membrane: Typically made of zirconia as the main material, with doping of rare earth elements such as yttrium and gadolinium. This membrane boasts excellent oxygen ion transport properties, capable of effectively converting atmospheric oxygen into oxygen ions at high temperatures and transporting them to the electrode surface through interstitial sites within the membrane, thereby enabling the measurement of oxygen concentration.