The bimetallic thermometer thermometer

Once again, today we are going to detailed introduce the core of the instrument products & ndash; — Bimetallic thermometer bimetallic thermometer is the use of two kinds of different expansion coefficient of metal components to measure the temperature of the thermometer. It is a kind of solid expansion thermometer. Its simple structure, strong, can partly replace mercury thermometer, used for gas, liquid and steam temperature measurement. Using bimetallic thermometer is a way to solve the mercury pollution, thus developing very quickly. Bimetallic thermometer is made up of two different expansion coefficient of metal sheet pile welding together made of temperature measuring element. One end of the bimetallic strip is fixed, if the temperature increases, bimetallic strip after heated with two kinds of sheet metal bending deformation resulting from the different expansion coefficient, the extent of the bend is proportional to the temperature. In order to improve the sensitivity of the instrument, the industrial application of the bimetallic thermometer is made the bimetallic strip, spiral and a fixed at the bottom of the measuring tube, at the other end to free end, and inserted into the spiral of bimetallic strip center shaft welded together. When the measured temperature changes, the bimetallic strip the free end displacement, rotation center axis, the transmission amplification mechanism, by the pointer indicates the measured temperature value. The common structure of bimetallic thermometer has two kinds: one kind is axial structure, bimetallic thermometer dial plane and protecting tube into vertical connection; There is a kind of radial gold hooks, bimetallic thermometer dial plane and protection tube into horizontal connection. Can be observed according to the operation conditions of the installation and convenient to choose the axial or radial structures. He can make it with upper and lower limit contact electric contact bimetallic thermometer, when the temperature reaches a given value, closes the electric contact, can send electrical signals, realize the temperature control or alarm function.