Bimetallic thermometer

Bimetallic thermometer is a kind of measurement in the field of low temperature test instrument. Can be directly measured in the process of various production - 80℃- Liquid + 500 ℃ range steam and gas medium temperature. Bimetallic thermometer is mainly used in industry of element is one with two or more pieces of metal laminate composed of multilayer metal together, using two different metal working in the principle of expansion degree of different temperature changes. Is based on the ring around made of bent bimetallic strip. End is heated expands, turns the pointer, the instrument will show thermoelectric potential should value. Bimetallic thermometer is mainly used in industry of element is one with two or more pieces of metal laminate composed of multilayer metal together. Can automatically continuous recording instrument temperature changes, in order to improve the temperature measuring sensitivity, is usually made of metal spiral coil shape. When multi-layer metal temperature change, the layers of metal expansion or contraction, makes the spiral coil rolled up or let go. As a result of the spiral coil end fixed and the other end connected to a free rotating pointer, two kinds of metal is not the same as the amount of volume change as the temperature changes, so will be bent. Its one end fixed and the other end with the temperature change and displacement, displacement and temperature close to the linear relationship. By recording the clock recording system, recording pen, recording pen are connected to the zoom lever manipulation and sensing elements as a result, when the bimetallic strip feel the temperature change, Pointers can be on a circular dividing scale to indicate the temperature. The thermometer and the rod of glass liquid thermometer USES similar, but can be used under the condition of higher mechanical strength.