Electrolytic thermometric thermometer

G - Physics – 01 – K

Patent

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Details

G01K 5/22 (2006.01) G01K 5/12 (2006.01)

Patent

CA 2278524

Accordingly, the present invention provides a thermometer comprising a capillary tube having a bore extending along the length of the tube, a bulb disposed at an end of the tube and in fluid communication with the said bore, and a thermometric liquid provided in the bulb, the said thermometric liquid being an aqueous solution of one or more electrolytes, said thermometric liquid having a surface tension greater than that of water and being substantially free of dissolved gases, at least the inner surface of the bore of the capillary tubing being a low surface energy material, the surface energy of the said low surface energy material being lower than the surface tension of the thermometric liquid by a factor which is at least two.

La présente invention a pour objet un thermomètre. Ce dernier comprend un tube capillaire avant un alésage le long du tube, une partie renflée à une extrémité de ce tube et en communication par le fluide avec cet alésage, et un liquide thermomètrique prévu dans cette partie renflée. Ce liquide est une solution aqueuse de un ou plusieurs électrolytes, et présente une tension superficielle supérieure à celle de l'eau, et est totalement dépourvu de gaz dissous. La surface intérieure au moins de l'alésage du tube capillaire est un matériau à faible énergie de surface. L'énergie de surface de ce matériau à faible énergie de surface est inférieure à la tension superficielle du liquide thermomètrique par un facteur qui est au moins égal à 2.

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