How to choose a suitable bimetallic thermometer

Bimetallic thermometer in industrial production, in many cases, have clear requirement on temperature, especially in low temperature conditions, many pipes are equipped with double metal thermometer, to real time measuring the temperature of the pipe, to ensure normal production. Then, is how to choose the bimetallic thermometer? We know that the bimetallic thermometer is the use of two different metals in the principle of expansion degree of different temperature changes. Bimetallic thermometer is mainly used in industry of element is one with two or more pieces of metal laminate composed of multilayer metal together. 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, therefore, when the bimetallic strip feel the temperature change, Pointers can be on a circular dividing scale to indicate the temperature. This kind of instrument of temperature measurement range is - 80 ~ 600 ℃, permissible error are the range of 1. About 5%. The thermometer and the rod of glass liquid thermometer USES similar, but can be used under the condition of higher mechanical strength. According to the need to choose a different way: vertical installation, select the radial or universal type bimetallic thermometer. When mounted horizontally, choose type axial or universal bimetallic thermometer. When installation, according to the actual need to select the axial and radial or universal type bimetallic thermometer. If you need to control the measurement point set upper and lower alarm, can choose electric contact bimetallic thermometer. Bimetallic thermometer, widely used under the condition of high mechanical strength requirements. And have waterproof, corrosion resistance, vibration resistance, intuitive, easy reading, no mercury pollution, strong and durable, etc. Alternative to many other forms of thermometer table, widely used in petroleum, chemical industry, machinery, ships, electricity, textile, printing and dyeing and other industrial and scientific research departments.