Look at this on eBay
http://www.ebay.co.uk/itm/182373517874 one of these kits is on its way. I'll try it on the cheap hotplate and see how it performs. There's more suitable temp probes on the same site which are a couple of quid so will use one of those rather than the type supplied. If it's successful it will end up fitted to a lead melter.
It won't do too high a temp but should be ideal for blues. If I need to go higher I'll use gas and my twin channel k type digital thermometer used on the caustic tank.
