Sealing apparatus for electrical apparatus oil sampler and conditioner for solid state sensors

Sealing apparatus for creating a leak-free environment for a gas sensor used for analysis of insulating oil from electrical assets, comprising:

• a manifold having a cylindrical chamber formed therein for receiving a gas sensor, said chamber having an upper portion having a first diameter and a lower portion with a second diameter that is less than the first diameter and an inwardly projecting annular ledge between the upper and lower portions;
• a gas sensor having a cylindrical sensor body, said sensor body inserted into the chamber;
• an O-ring on the sensor body, said O-ring having an outer diameter that is greater than the second diameter and less than the first diameter so that when said O-ring is inserted into the chamber the O-ring contacts the annular ledge;
• a clamp ring having an outer diameter that is less than the first diameter, said clamp ring encircling the sensor body and inserted into the upper portion of the chamber such that a lower edge of said clamp ring contacts the O-ring;
• a retaining plate attached to the manifold and in contact with the clamp ring, said retaining plate compressed against said clamp ring to thereby compress the O-ring.