How to choose the bimetallic thermometer used in industry of long tail?

Bimetallic thermometer is mainly used in industrial equipment, hvac equipment, power plants, Marine, etc. Its temperature measurement method for the contact, just insert the bimetallic thermometer heat pipe can be measured medium, so how to choose the bimetallic thermometer used in industry of long tail? This type axial bimetallic thermometer shown above, for example, in calculating its tail long need to consider two aspects of factors. One is the way and the total installation height of installation; Another is to use the insertion depth of the environment and insertion depth teeth? Specifically as follows: 1. If the installation for the teeth or flange connection, tail length = total installation height - The height of the header - The teeth or flange height The height of the mounting base ( If you have) ； This way of calculation only bimetallic thermometer is suitable for the axial type, if the radial or universal type bimetallic thermometer is not applicable; 2. If even teeth insertion depth, tail length = - insertion depth Screw tooth height; If the insertion depth is not even the teeth, long tail = insertion depth.