Expanding liquid thermometer comprising: a / a reservoir of thermometric liquid , b / a capillary tube in fluid communication with said reservoir of liquid , comprising a first end and a second end , c / a tubular casing of transparent material comprising: - an outer surface , - an inner surface delimiting an inner volume , - a first casing end , - a second envelope end which comprises a closing wall closing off said internal volume , and which comprises an internal surface formed from a portion of said internal surface of said tubular casing , at the level of which second casing end is formed said liquid reservoir , and in the internal volume of which tubular casing extends said capillary tube , and d / a graduated scale facing at least part of said capillary tube , said liquid reservoir being formed integrally with said first end of said capillary tube , said liquid reservoir comprising an outer surface which extends opposite said internal surface of said second end of the tubular casing , said thermometer comprising securing means between said internal surface of said second end of the tubular casing , on the one hand, and said outer surface of said liquid reservoir , on the other hand, characterized in that said securing means consist of a silicone type adhesive . a / a reservoir of thermometric liquid , b / a capillary tube in fluid communication with said reservoir of liquid , comprising a first end and a second end , c / a tubular casing of transparent material comprising: - an outer surface , - an inner surface delimiting an inner volume , - a first casing end , - a second envelope end which comprises a closing wall closing off said internal volume , and which comprises an internal surface formed from a portion of said internal surface of said tubular casing , at the level of which second casing end is formed said liquid reservoir , and in the internal volume of which tubular casing extends said capillary tube , and - an outer surface , - an inner surface delimiting an inner volume , - a first casing end , - a second envelope end which comprises a closing wall closing off said internal volume , and which comprises an internal surface formed from a portion of said internal surface of said tubular casing , d / a graduated scale facing at least part of said capillary tube , said liquid reservoir being formed integrally with said first end of said capillary tube , said liquid reservoir comprising an outer surface which extends opposite said internal surface of said second end of the tubular casing , said thermometer comprising securing means between said internal surface of said second end of the tubular casing , on the one hand, and said outer surface of said liquid reservoir , on the other hand, characterized in that said securing means consist of a silicone type adhesive . said liquid reservoir comprising an outer surface which extends opposite said internal surface of said second end of the tubular casing , said thermometer comprising securing means between said internal surface of said second end of the tubular casing , on the one hand, and said outer surface of said liquid reservoir , on the other hand, characterized in that said securing means consist of a silicone type adhesive . <EOS>