13. How to specify an assembly (U length, Insertion Length, Probe Length, Etc)

A. Insertion depth is used when an assembly does not utilize a thermowell.  Defined as the distance including 50% of the process threads, down to the tip of the probe. 

B. Probe length is the complete length of the probe including the length extended inside the connection head.  Probe length is calculated by Insertion depth + fitting adder ‘A’.

C. U length is used when an assembly utilizes a thermowell.  Defined as the distance from the tip of the thermowell up to the beginning of the process threads. 

D. Spring loaded holders offer a little length tolerance flexibility when combining these into an assembly. 

E.  Click here for the full pdf version of the diagram below.

Assembly Calculator

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