The use of bimetal thermometer precautions

What should you watch out for when using bimetal thermometers? The bimetal thermometer is an on-site measuring instrument suitable for measuring medium and low temperatures and can directly measure gas. The following is a detailed introduction.

Since one end of the spiral coil is fixed and the other end is connected to a pointer that can rotate freely, when the bimetal feels a temperature change, the pointer can indicate the temperature on a circular graduated scale. The temperature range of this instrument is usually 200 ~ 650 °C, the allowable error is about 1% of the scale scale. The use of bimetal thermometer thermometers and rod-shaped glass liquid thermometers is similar but can be used with higher mechanical strength requirements. And has: waterproof, anti-corrosion, shock-resistant, 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 practical applications, there are 1Gr18Ni9Ti stainless steel and molybdenum dititanium for protection pipes, which have strong pressure resistance and corrosion resistance. The dial has the following structural types: Axial, Radial, 135-degree, Universal-type, etc. It is suitable for various on-site installations. The following points should be noted during use:

1, bimetal thermometer protection tube immersed in the measured medium length must be greater than the length of the temperature sensing element, generally immersed in length greater than 100mm, 0-50 °C range immersion length greater than 150mm, in order to ensure the accuracy of the measurement.

2. All kinds of bimetal thermometers should not be used to measure the temperature of the medium in open containers. Charged junction thermometers are used in control loops where the working vibration is greater than the wing.

3. In the storage, use, installation and transportation of bimetal thermometers, collision protection tubes should be avoided. Do not bend the protection tube and use it as a wrench.

4, the thermometer should be tested regularly under normal use. It is generally appropriate every six months. Electrical contact thermometers are not allowed to work under strong vibrations so as not to affect the reliability of the contacts.