Do you know purchasing bimetallic thermometer should pay attention to the problem?

Working principle of the bimetallic thermometer is to put the two pieces of expansion coefficient difference is very big pieces of metal welded together. When the temperature changes, the difference is very big, caused the different expansion coefficient of expansion and contraction, the deformation of sheet metal bending. According to different deformation and produce different momentum, momentum to drive the connection shaft and the other end of the indicating needle, indicate the temperature. In our T400C type thermometer, for example, its specification models as follows: T400C type: hot shell bimetallic thermometer structure: axial type cover circle: flange type, full stainless steel material: stainless steel SS304 tooth head: 1/2 & quot; NPT other optional surface diameter: 100 mm heat pipe diameter: 6. 35 mm heat pipe length: 150 mm ( 50 - Optional) around 1200 mm. Temperature range: 0 - 120° C ( Can be customized) Accuracy: & plusmn; 1. Table: 5% glass protection grade: IP65 ( Dust, water) So you can see, purchasing bimetallic temperature, we need to know the structure style ( Associated with the installation environment) , material ( Associated with using the environment) , tooth head ( Related to connection) Diameter, surface ( With the size of the installation of the equipment) , heat pipe diameter and length, Related to the medium being measured) 。