Sealings: Ensure airtightness (to prevent leakage from interfering with measurement) and watertightness between the probe insertion part and the installation interface.

Ceramic-Metal Seals (Critical Seals): These are essential for highly reliable insulation and sealing in areas of the probe close to the core, such as lead-out wires and gas channels. They isolate sensitive core components from the external metal housing and wiring while ensuring a clear gas path. Accumulate little by little, and grow tall; accumulate drop by drop, and become deep.