by means of fluid contained in a hollow body having parts which are deformable or displaceable under the pressure developed by the fluid

Full Title

Details of thermometers not specially adapted for particular types of thermometer (circuits for reducing thermal inertia G01K7/42) > Compensating for effects of temperature changes other than those to be measured, e.g. changes in ambient temperature > by means of fluid contained in a hollow body having parts which are deformable or displaceable under the pressure developed by the fluid