I wanted to build a PID for my pot and thought I would try this first to learn how to do it.
Anyway I bought 1 of these PID and sensor:
http://www.ebay.com/itm/Microcompute...item540396bd52
And 1 of these:
http://www.ebay.com/itm/6mm-x-50mm-E...item35d232c160
Total shipped about $25 and once I figured out that the relay is only a off and on switch it works fine.
2 things I can point out the controller is in centigrade but is Ok
and the cartrige heater works too well.
The 200W heater get so hot so fast that when the controller turns if off it over shoots by 5 degrees or so.
I drilled a hole in the side of a 5/8x6x6 Al plate to mount my lube sizer on.
Kinda cool I did not like the shop light hanging on the sizer or the flate iron deal.
Any way try it out.
bruce