Measuring and testing – Gas content of a liquid or a solid – By vibration
Patent
1989-05-01
1989-11-07
Tokar, Michael J.
Measuring and testing
Gas content of a liquid or a solid
By vibration
G01N 710
Patent
active
048783757
ABSTRACT:
The device comprises an immersion probe (10) which is permeable to hydrogen and is made of melt-resistant sintered or calcined ceramic material connected, in a vacuum tight manner via a capillary tube (4), to a pressure gauge (2). The immersion probe (10) features at least two essentially plate-shaped diffusion membranes (7,8) that in each case form a common interface (9). The capillary tube (4) as such communicates freely with the interface (9). The immersion probe (10) is preferably situated in a crucible featuring openings above the level of the probe (10); on dipping the crucible into the melt 12, the openings allow the melt (12) to flow in, permit equalization of the hydrogen content of the metal and, after removing the crucible from the melt (12), allow the melt to flow out leaving a residual amount that protects the probe (10). The measuring probe is robust, easily changed and features a short response time.
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Roskos Joseph W.
Swiss Aluminium Ltd.
Tokar Michael J.
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