Bimetallic thermometer which parts by heat?

Bimetallic thermometer which parts by heat? A lot of people are not very aware of the problem, and there are many technical problems in use. In order to make everyone better use of bimetallic thermometer in the process of operation. We will talk about the bimetallic thermometer for which parts by heat? Is the pipe? Or the head of the pipe? First of all, the bimetallic thermometer is the use of two different temperature expansion coefficient of metal, welding in fixed point at one end, and the other end when the temperature distortion, converts it into a pointer deflection Angle, indicating the temperature. This is the working principle of the double metal can let us know how the bimetallic thermometer work, how to heat. Secondly, on the outer wall of the pipe is induction temperature ten? Can clearly tell you that the outer wall of the pipe to temperature change to the inside, also can say is the heat pipe. Finally, the outer wall and internal metal spiral coil in the shape of a metal called double metal? About this problem, small make up to everyone's explanation is that the pipe with a filamentous metal and spiral metal together. Through the above three, we knew the bimetallic thermometer is to rely on which part of heat? And whether the outer wall of the pipe heat and so on. Clear understanding of these problems, can let us avoid making mistakes in the use, cause the measuring error of bimetallic thermometer, affect the measurement result. Under the precondition of deformed application, bimetallic thermometer measurement results accurate level is called the accuracy of the instrument, instrument called precision accuracy of behaviour. Precision is reaction instrument deviation small of the eve of the term. The formula for the delta = ( △马克斯) / ( Аmax) ×100% ( The delta for precision grades; Delta Max for the measurement of the eve of the deviation; А Max to full scale. ) In industry measurement and precision grade in a way that shows the level of precision, accuracy grade is the deviation to avail himself of the loss of the eve of the '+' and '%'. Accuracy grade is one of the main indicators of weighing instrument character is good or bad, our country industry instrument grades are divided into 0. 1, 0. 2, 0. 5, 1. 0, 1. 5, 2. 5, 5. 0 seven grades, and flag on the meter scale or nameplate. The accuracy grade of behaviour called precision grade. Bimetallic thermometer, for example. Precision grade based on its promise to deviation of the dial scale value percentages, respectively, the accuracy grade number of the promised to deviation of the dial scale limit value of the eve of the university. The eve of the range, precision grades of the same, it measured the relative value of temperature to allow the deviation of the university. 1. Level 5 to 1. Level 0 distinguish performance in deformity application case, the deviation for the promise of the thermometer range of + / - 1. 5 to + / - 1. 0%. 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.