I bought a ZVS 1000w induction heater I would like to control it with a thermostat in order to control the temperature of my steel piece. I hold the piece with a clamp and I don't want to put a sensor inside the coil. what would be other options? Infrared or laser ? coupled with which kind of thermostat? something up to 1100 or 1200° C I guess as I only put small piece of metal in.
Obviously, this is a hobby project so I don't want to spend thousand of dollars