What's the use of bimetallic thermometer adjustable screw?

Bimetallic thermometer can be directly measured 50 c to 500 c medium temperature, according to the using environment is different, can be divided into household bimetallic thermometers and industrial bimetallic thermometer. They work is working principle is to use different expansion coefficient of two kinds of metals ( Or alloy) Piece together form a thermal components, generally made spiral wound, its end ( The free end) Equipped with a pointer. When the temperature changes, the thermal component of curvature change, free end rotation, drive the pointer indicates the temperature value on the dial. We are buying bimetallic temperature time, specification is introduced in the sometimes write & other; With adjustable screw & throughout; , so, do you know what's the use of bimetallic thermometer adjustable screw? In fact you don't look down upon this little adjustable screw, it used a lot. If the bimetallic thermometer use after a period of time, a temperature measurement deviation, then we can through the adjustable screw to fine-tune. So, when the choose and buy, can according to your actual needs, to see if need to purchase & other; With adjustable screw & throughout; Style. However, ordinary household bimetallic thermometer, generally do not need to fine tune, because it USES single environment, measurement are not allowed to be less likely to happen; With industrial bimetallic thermometer is not the same, some equipment in strong motion state for a long time, we are asking for devices of the bimetallic thermometer calibration, regularly to ensure the accuracy of temperature measurement. When we found that the temperature measurement is allowed to, can to fine-tune the bimetallic thermometer.