What elements are in the oxygen sensor?

There is a porous Oxygen Sensor Heating Element in the oxygen sensor, which is a solid electrolyte of double-sided sintered porous platinum electrode. At a certain temperature, due to the different oxygen concentrations on both sides, the oxygen molecules on the high concentration side are adsorbed on the platinum electrode and combine with electrons to form oxygen ions, making the electrode positively charged. 

The oxygen ions migrate to the low oxygen concentration side through the oxygen ion vacancy in the electrolyte, making the electrode negatively charged, that is, generating potential difference. Oxygen sensors are standard on cars. It uses ceramic sensor to measure the oxygen potential in the automobile exhaust pipe, calculates the corresponding oxygen concentration according to the principle of chemical balance, and monitors and controls the combustion air-fuel ratio, so as to ensure the product quality and exhaust emission standards. When the air-fuel ratio of the mixture deviates from the theoretical air-fuel ratio, the purification capacity of the three-component catalyst for carbon monoxide, hydrocarbon and nitrogen oxide will be sharply reduced. Therefore, an oxygen sensor is installed in the exhaust pipe to detect the oxygen concentration in the exhaust gas and send a feedback signal to the electronic control unit, which then controls the increase and decrease of fuel injection from the injector, thus keeping the air-fuel ratio of the mixture close to the theoretical value.