# Thermocouples specs

### How to find Thermocouple specs (from scratch)

When looking for a thermocouple, you need to verify some specs before you will know what kind they are looking for.

##### The below questions help to find what is required:

Head material: Cast aluminum, Cast Iron,  
Dimensions: Shaft diameter, Length, threading Diameter  
Probe Length:  
Type: J,K,S or RTD (heat range)  
Wires 1: Is there a head?  
Wires 2: How many wires? How long? Grounded?  
Probe Material: Stainless steel, Coper,?  
Media: Oil, Water,?

\*\*Probe Only\*\*  
Type: J,K,S or RTD (heat range)  
Probe Length:  
Probe Material: Stainless steel, Coper,?.  
Wire coat Material: Fiberglass?  
How long is the lead wire:  
Media: Oil, Water,?