The one you'll get with the unit is as shown in the pic ie. plastic cable with 1" sensor on the end. When I bought my STC-1000 I also bought the long ss NTC sensor that MM sells and it works a treat. You cannot connect these to a FridgeMate though.
Cheers, Hoges.
So with the S/Steel probe, they would be suitable as controllers for a herms set up, Yes?
Daz