How is the pressure type thermometer is a temperature measurement?

Thermometer should be one of the most commonly used tool in our life, usually used for accurate judgment and measuring temperature. Use of solid, liquid and gas is influenced by temperature and heat bilges cold shrink phenomenon such as the basis for design. With kerosene thermometer, alcohol thermometer, mercury thermometer, pressure type thermometer, resistance thermometer, thermocouple thermometer, radiation thermometer and light thermometer, bimetallic thermometer thermometer for us to choose, but must pay attention to the correct method of use, understand all kinds of thermometer table related characteristics, and to facilitate better use. Pressure type thermometer is the use of liquid or gas pressure or volume made of the characteristics of non-contact thermometer with temperature changes. As a result of the change of pressure change in the curvature of spring tube, and the free end displacement, through the connecting rod and direct drive gear drive the pointer on the dial indicator temperature changes in the value. About it how to measuring temperature, is also a concern of everyone, I'm afraid. The principle of pressure type thermometer is based on the sealing temperature measuring system of liquid evaporation changes in the relationship between saturated vapor pressure and temperature, the temperature measurement. When bulb feel temperature, saturated vapor produced the corresponding pressure in the closed system, cause the change of curvature elastic element, make its produce a shift in the free end, again by the displacement amplification mechanism of gear into the indicated value. It can be made into shock, anti-corrosion type or flange installation, and can realize remote reading. Pressure type thermometer consists of bulb, capillary and elastic element ( Pictured above) Bags as working medium, temperature, when measuring temperature, insert the bulb of the measured medium, affected by the medium temperature, temperature package internal working medium volume or pressure changes, the capillary pass this change to the elastic element ( Such as spring tube) , components elastic deformation, displacement of the free end, with the aid of transmission mechanism, drive the pointer indicates the temperature value on the dial.