是一种适合测量中、低温的现场检测仪表，可用来直接测量气体、液体和蒸汽的温度.其原理是利用两种不同金属在温度改变时膨胀程度不同的原理工作的。 Bimetal thermometer is a kind of field testing instrument suitable for measuring medium and low temperature. It can be used to directly measure the temperature of gas, liquid and steam. Its principle is based on the principle that two different metals expand differently when the temperature changes. The main component of an industrial bimetal thermometer is a multilayer metal sheet composed of two or more metal sheets laminated together. In order to improve the temperature measurement sensitivity, the metal sheet is usually made into a spiral shape. When the temperature of the multi-layer metal sheet changes, the amount of expansion or contraction of each layer of metal varies, so that the spiral coil is rolled up or loosened. Because one end of the spiral coil is fixed and the other end is connected to a pointer that can rotate freely, when the bimetallic piece experiences a temperature change, the pointer can indicate the temperature on a circular indexing scale. The temperature measurement range of this instrument is usually 200 ~ 650 ℃, and the allowable error is about 1% of the scale. Bimetal thermometers are similar to rod-shaped glass liquid thermometers, but they can be used under conditions that require higher mechanical strength. And has: waterproof, anti-corrosion, shock resistance, intuitive, easy to read, mercury-free, durable and so on. Can replace many other forms of temperature measuring instruments, widely used in petroleum, chemical, machinery, shipbuilding, power generation, textile, printing and dyeing and other industrial and scientific research departments. In actual application, the protective pipes are 1Gr18Ni9Ti stainless steel and titanium molybdenum, which have strong pressure and corrosion resistance. Dial structure forms are: axial type, radial type, 135 degree type, universal type and other varieties, which are suitable for various site installation needs. The following points should be noted during use:
保护管浸入被测介质中长度必须大于感温元件的长度，一般浸入长度大于100mm,0-50℃量程的浸入长度大于150mm，以保证测量的准确性。 1. The length of the bimetal thermometer protection tube immersed in the measured medium must be longer than the length of the temperature sensing element. Generally, the immersion length is greater than 100mm, and the immersion length of the 0-50 ℃ range is greater than 150mm to ensure the accuracy of the measurement. 2. Various types of bimetal thermometers should not be used to measure the temperature of the medium in the open container. The contact wing of the charged contact thermometer is used in the control loop of the occasion with large working vibration. 3. In the storage, use, installation and transportation of the bimetal thermometer, avoid collision with the protection tube, do not bend the protection tube and use the watch as a wrench. 4. The thermometer should be inspected periodically under normal use. Generally every six months is appropriate. Electrical contact thermometers are not allowed to work under strong vibration, so as not to affect the reliability of the contacts.
是一种适合测量中、低温的现场检测仪表，可用来直接测量气体、液体和蒸汽的温度。 Industrial bimetal thermometer is a kind of field testing instrument suitable for measuring medium and low temperature, which can be used to directly measure the temperature of gas, liquid and steam. The thermometer is waterproof, corrosion-resistant, shock-resistant, intuitive, easy to read, mercury-free, sturdy and durable from the design principle and structure. The bimetal thermometer can automatically send a control signal to cut off the power when the operating temperature exceeds a given value Or alarm. It can replace other geotechnical temperature measuring instruments and is widely used in petroleum and chemical industry, machinery, shipbuilding, power generation, textile, printing and dyeing industries and scientific research departments.