from material contained in a hollow body having parts which are deformable or displaceable under the pressure developed by the vapour

Full Title

Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 > using evaporation or sublimation, e.g. by observing boiling > from material contained in a hollow body having parts which are deformable or displaceable under the pressure developed by the vapour