Bimetallic thermometer to measure temperature of 40 degrees below zero?

Bimetallic thermometer main component is a use two or more pieces of metal laminate composed of multilayer metal together, using two different metal working in the principle of expansion degree of different temperature changes. Is based on the ring around made of bent bimetallic strip. End is heated expands, turns the pointer, the instrument will show thermoelectric potential should value. It is a kind of measurement in the field of low temperature test instrument. Can be directly measured in the process of various production - 50℃- Liquid + 500 ℃ range steam and gas medium temperature. So the bimetallic thermometer can measure the low temperature of 40 ℃ below zero. Structure: universal type cover circle: flange type, tray type panel material: stainless steel SS304 tooth head: 1/2 & quot; NPT other optional surface diameter: 80 mm heat pipe diameter: 6. 35 mm heat pipe length: 150 mm ( 50 - Optional) around 2000 mm. Temperature range: - 40 + 80 c: precision & plusmn; 1. Table: 5% glass protection grade: IP65 ( Dust, water) In this kind of bimetal thermometer, for example, if the working temperature range is 40 degrees below zero, you only need to in the custom is to tell us the parameters.