Bimetallic thermometer and pressure type thermometer how to choose?

Bimetallic thermometer and pressure type thermometer belong to our common thermometer list, so what is the bimetallic thermometer or pressure type thermometer? Today we said from they work for their respective features, for when the choose and buy for everybody reference. The bimetallic thermometer works by thermal element is composed of two layers of linear expansion coefficient difference relatively large pieces of metal welded together, one end of the element as the fixed end, the other end to free end. When the temperature changes, because the bimetallic strip of material is different, linear expansion coefficient of relatively large differences, and produce different expansion and contraction, leading to the curving deformation of bimetallic strip, equipped with actuator (at the free end Dial pointer and temperature) So that it can directly show the temperature value. The advantage of the bimetallic thermometer measurement range is wide, mechanical design, reliable temperature measurement value. Pressure type thermometer is the use of liquid or gas pressure or volume made of the characteristics of non-contact temperature sensor with temperature change. 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. Pressure type thermometer are the advantages of convenient use, can remote temperature measurement.