Clinical thermometer
AssigneeGeraberger Thermometer Werk GmbH
InventorsGerd Speckbrock, Siegbert Kamitz, Marion Alt, Heribert Schmitt
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Abstract
A clinical thermometer registers the maximum temperature reached and uses as the thermometric fluid a non-toxic gallium/indium alloy which adheres to the walls of the thermometer measuring tube, the adhesive force being greater than the internal cohesive force of the thermometric liquid. A Gallium/indium/tin eutectic alloy is particularly useful in such applications and others.
Claims7
A clinical thermometer which registers the maximum temperature reached with a bulb and a measuring tube containing a liquid, characterized in that the liquid is a eutectic alloy containing gallium in a concentration of 65-95 wt.-%, indium in a concentration of 5-22 wt.-% and tin in a concentration of 0-11 wt.-%, the inside liquid-contacting surface of said measuring tube having disposed thereon a gallium oxide coating produced by reaction of said liquid with water contained in a water coat on said inside surface of said measuring tube.
Dependencies are inferred from the claim text.