Originally Posted by lschiavo
I agree. I like some indicator of true off. Call me old school but I used a definate purpose contactor for my HLT. It "clunks" on and "clunks" off and hums a bit when its on.
I am also using a definite purpose contactor as well as a SSR. Turn switch on to activate the DP contactor, which feeds one leg to the SSR and one to the receptacle. The leg that goes to the SSR gets switched by the PID. That way, I know that if the switch is off, the element is NOT energized at ALL. Also have a lighted switch to know when it's switched on (as if the clunk isn't enough), as well as a separate indicator to show when the element is cycling on and off by the PID. Sounds like a lot, but it's actually pretty simple. Contactors are cheap ($14 at Auber for 40A), and are widely used in industrial controls.