How can prolong the service life of the bimetallic thermometer?

Bimetallic thermometer is very widely, petrochemical industry, hvac equipment, ventilation equipment, power plants, laboratories, home, etc. So how can prolong the service life of the bimetallic thermometer? Actually, in everyday use, correct operation, to a great extent, can prolong the service life of the bimetallic thermometer. The correct use of bimetallic thermometer need to pay attention to the following questions: 1, bimetallic thermometer in custody, installation, use and transportation process, should try to avoid collision protection tube, don't make the protection tube bending, deformation. When installation, it is forbidden to twist the instrument shell. 2, the bimetallic thermometer should be - 30 ℃ ~ 80 ℃ environment temperature in normal work. 3, the temperature of the bimetallic thermometer often work best to 1/2 to 3/4 in scale range. 4, bimetallic thermometer protecting tube immersed in the measured medium length must be greater than the length of the thermal components, generally greater than 100 mm in length, 0 50 ℃ range into greater than 150 mm in length, so as to ensure the accuracy of measurement. 5, all kinds of bimetallic thermometer should not be used to measure open containers within the medium temperature, electric contact thermometer should not be at work used in the control circuit of larger vibration occasions. 6, bimetallic thermometer in custody, use the installation and transportation, should avoid collision protection tube, do not make the protection tube bending variant and the table when the spanner is used. 7, thermometer in the case of normal use shall be regular inspection. Is every six months. Electric contact thermometer is not allowed to work under strong shock, so as not to affect the reliability of the contact.