The outer layer is a 304H heat-resistant steel protective tube capable of withstanding instantaneous high temperature shocks up to 1300°C. The middle layer, an aluminum oxide ceramic fiber layer, prevents internal gas corrosion. The inner layer's reference gas self-purification device filters particles larger than 20μm, extending the probe's average service life under continuous carburization conditions to 18-24 months. A microcrystalline silicon carbide coating is applied to the surface of the measurement electrode, effectively reducing the rate of carbon black deposition, and extending the maintenance cycle from every 200 hours to 600 working hours for the conventional probe.

Real-time monitoring of zirconia element impedance changes; automatically triggers a warning signal when impedance exceeds 50kΩ, alerting to probe failure risks 2-3 weeks in advance. Utilizes a miniature turbine pump to achieve a closed-loop circulation of reference gas, avoiding blockage issues typically found in traditional open-loop reference gas channels, extending maintenance cycles from weekly to quarterly.

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