I got my thermo coupling from Omega. You kind of design it on there web site and they send it out to you. I went kind of overboard.It ended up costing around $50 bucks, but it's built like a tank. The actual unit I plug it into I found on E-bay for about the same.
A digital thermometer is what you need. The AUBER pid controller makes a good thermometer to. I have one to control my heat treat oven. Usually whithin 1 - 2 degrees. You need a k type thermocouple rated at 2300 degrees +
TJ
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