There are 2 SSR's in the box. The switches are between the PID and SSR. You still have power to the PID to change settings but have no power going to the elements. The third PID just displays the temp in the MLT.
Has anyone else tried these PID's? I was wondering what everyone else thought of them. I have a Auber but need 2 more. If these were any good I would purchase 3 and use the Auber in another project.