| 摘要 |
<p>In a preferred embodiment, a liquid level sensor (10) for use in a hot, pressurized liquid (14), including: an outer housing (20) suitable for immersion in liquid (14); an inner housing (22) disposed within outer housing (20) and containing therein electronic/electrical components (70); detection apparatus (74) disposed within outer housing (20) and inner housing (22) to detect the level of liquid (14); a space defined between outer housing (20) and inner housing (22); and means (98) to permit liquid (14) which migrates through a wall of outer housing (20) into the space and which is vaporized therein to pass to the ambient surroundings, so as to preclude migration of the liquid through a wall of inner housing (22).</p> |
