What temperature range from 300 to 400 degrees with a thermometer?

Thermometer has a lot of kinds, if the measured medium can be direct contact, belt scale according to the pointer readings of the bimetallic thermometer is a good choice. Principle is according to the principle of heat bilges cold shrink of different metal a mechanical thermometer, temperature from 300 to 400 degrees. Bimetallic thermometer generally material for SS304 stainless steel, SS304 have antiseptic effect, strong and durable, especially suitable for chemical pipelines, the price is very favorable, operation is very easy to use. Bimetallic thermometer temperature sensing element is two pieces of expansion system made of different metal stitch welding together. Bimetallic strip after heat due to the expansion of the two sheet metal bending length is not the same. The length and width of the linear expansion of the higher the temperature the greater the difference, thus draws the greater the bending Angle, the bimetallic strip are made into spiral tube, this is the working principle of bimetallic thermometer. Bimetallic thermometer can be used in any high temperature occasion need it, it USES the super alloy shell can not only make it adapt to the high temperature environment, but also for liquid, gas, such as erosion, water environment is easy to damage has a strong protective effect, its wear resistance, corrosion resistance performance, suitable for all kinds of harsh harsh environment, for industrial measurement is a very precise value