Quote Originally Posted by robert7107 View Post
Looks like probe connection is similar to a 3.5mm head phone jack? Look at pictures it's the one to the bottom right it

Sent from my Nexus 6P using Tapatalk
Yes it is the 3.5mm jack. The most important thing in that pic is the 4th line down in description where it says it leaves out the safety relay. The safety relay makes it so if it fails it shuts off instead of running in on position, that is the number 1 reason why the Herpstat 1 is better than the 1 basic.

Sent from my SAMSUNG-SM-G891A using Tapatalk