Machine plasma torch IPTM-80 and ohmic sensor

Hi all

i bought a cheap plasma  Herocut Cut55i and i have machine plasma torch IPTM-80 like this
 
 

i try to do ohmic Hypersensing with a MESA THCAD-10 on my cnc table

Can you explain how physicali connect ohmic sensor?

Can i do ohmic ring something like that to the copper shield
 

or it is impossible on this type of torch and all that remains is floating switch?

thank you


 

Here is how I did it. 
forum.linuxcnc.org/show-your-stuff/56269...sensing-with-iptm-60
TLDR; Disconnect the ground lead in the plasma torch cable. Measure voltage between material ground and torch tip.