Basic knowledge of bimetallic thermometer1

Bimetallic thermometer is a kind of common common measuring temperature instrument, has important application in many industries and fields, such as petroleum, chemical industry, machinery, ships, electricity, textile, etc. , direct measurement of the temperature of the production workshop, has an important impact on production. But in the process of measuring temperature, need to application wants to know something about the basis of bimetallic thermometer, can better use to it. A, double metal thermometer can measure the temperature below zero? Bimetallic thermometer measurement range is different according to different models, respectively ~ + 40, 80 - 40 ~ 80, 0 ~ 50 +, 0 ~ 100, 0 ~ 150, 0, 0 ~ 200 ~ 300, 0, 0 ~ 400 ~ 500, under the scope of corresponding standards, can measure the temperature of minus. Second, the bimetallic thermometer flange problem 1. Bimetallic thermometer flange one inch or six points, the more the main temperature measuring rod diameter size 2. Is usually done DN40 or DN25, one inch or six points, the more the main see temperature measuring rod diameter size 3, if the bimetallic thermometer range is 0 100 degrees Celsius, the temperature is minus 15 degrees Celsius, it can be damaged by the thermometer? If the range is 0 100, when 15 degrees below zero, bimetallic thermometer will not damage, but still indicating value is zero. 4, how to distinguish between pressure type thermometer and bimetallic thermometer 1. Pressure type thermometer general surface temperature measurement equipment, and 2 with a capillary. Double metal is inserted into the pipe or equipment and flanged or threaded connection, 0 to 5 The bimetallic thermometer and - 100 degrees Celsius 15 - Bimetallic thermometer, 100 degrees Celsius, on the price difference? 0 - The bimetallic thermometer and - 100 degrees Celsius Bimetallic thermometer 15 to 100 degrees Celsius, the same manufacturer of the same model should be the same on the price.