The SSI Oxygen Probe is a high-precision oxygen concentration sensor widely used in industrial process control and laboratory applications, particularly in industries such as heat treatment, metallurgy, chemical engineering, and automotive manufacturing. Its core principle is based on the characteristics of zirconia solid dielectric batteries, which determine the oxygen concentration by measuring the difference in oxygen partial pressure between the inner and outer sides at high temperatures. The probe features a heat-resistant nickel-chromium alloy body and a metal-ceramic coating, offering excellent corrosion and thermal shock resistance.