GAS PRESSURE THERMOMETER, AND APPARATUS FOR APPLICATION IN A GAS PRESSURE THERMOMETER

摘要

A thermometer comprising an indicator, recording or control section and a measuring section coupled therewith and comprising a closed or shut off system having a gas container, a Bourdon tube and a capillary containing a gas under increased pressure, whereby the increased initial pressure has a value above which, upon isothermal pressure increase, the gas is subjected to a reduction in compressibility. The Bourdon tube is made of a hardened chromium-molybdenum alloyed steel.