Temperature controller for mokume gane

A customer of ours makes mokume gane in a small electric kiln. He is
having trouble holding the correct temperature for fusing the stack.
Can anyone recommend a good digital temperature controller?


The best way to add a digital controller to a kiln is to buy a stand
alone controller. You just plug it into the wall and the kiln into
it. Theses are available at many kiln stores including ours.