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首页 » 龙氏达新闻资讯 » 仪器仪表双金属温度计原理 You are here : ⎝⎛188比分直播⎞⎠ » Longda News » Principles of Bimetal Thermometers

Instrumentation bimetal thermometer principle

浏览: Source: Long's Electronic Technology Release Date: 2017-10-30Browse :

Instrumentation bimetal thermometer principle <br /> Instrumentation bimetal thermometer is suitable for measuring medium and low temperature on-site detection instruments. It can be directly used to measure the temperature of gas, liquid and steam. The characteristics of the thermometer: waterproof and corrosion-proof , Vibration resistance, intuitive, easy to read, non-mercury, sturdy and durable; it is designed from its principle and structure. Other geotechnical temperature measuring instruments have been replaced by WSS series bimetal thermometers, which have been widely used in petroleum and chemical industry, machinery, shipbuilding, power generation, textile, printing and dyeing industries and scientific research departments.
Advantages of instrumentation bimetal thermometer:
The protective tube is 1Gr18Ni9Ti stainless steel and titanium molybdenum, which has strong pressure and corrosion resistance.
Pull-type thermometer can be maintained or replaced for a short time without stopping the machine.
Mercury-free, easy to read, rugged and shock-resistant.
Axial type, radial type, 135o type, universal type and other varieties are complete, suitable for various site installation needs.
The working principle of the instrument bimetal thermometer is to use two different metals to expand differently when the temperature changes. The bimetal thermometer is mainly composed of a multilayer metal sheet element composed of two or more metal sheets laminated together; it is used in industry. The metal sheet is made into a spiral coil shape mainly to improve the temperature measurement sensitivity. When the temperature of the multi-layer metal sheet is changed, the amount of expansion or contraction of each layer of metal sheet varies depending on the temperature, so that the spiral coil is rolled up or loosened. This is caused by the fact that one end of the spiral coil is fixed and the other end is connected to a pointer that can rotate freely. Therefore, when the bimetallic piece experiences a temperature change, the pointer can be displayed on a circular indexing scale The change in temperature comes. 200 ~ 650 ℃ is the temperature measurement range of the bimetal thermometer, and the allowable error is about 1% of the two passes of the scale. The use of rod-shaped glass liquid thermometers can also be applied to bimetal thermometers, but its range of use is to operate under conditions requiring higher mechanical strength.
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