What is the core component of the body surface temperature and pressure?

Temperature and pressure of a surface can also indicate temperature and pressure. Temperature and pressure of a surface is widely used in petroleum, mine, chemical hvac and other fields. What is the core component of the body surface temperature and pressure? Instrument to tell you: temperature and pressure as the core parts of the body surface temperature sensing element: double coil, metal pressure element: spring tube. When the temperature changes, because the bimetallic strip of the materials of the two different linear expansion coefficient is relatively large and produce different expansion and contraction, leading to a bimetallic strip bending deformation, the amount of deformation of different produce different momentum, momentum transfer drive connection shaft, shaft drive at the other end of the indicating needle, indicating pointer is just on the correct reading, indicate the temperature. Pressure on the temperature and pressure surface parts is usually composed of elastic element and movement. Sensitive element within the pressure gauge by table bourdon tube elastic deformation, again by the transformation mechanism of movement in table will stress deformation to a pointer, pointer rotation to display the pressure.