Review on Inkbird PID Temperature Controller Kit with SSR 40DA Solid State Relay and K Type Thermocouple: High Voltage 100ACV to 240ACV and White Heat Sink Included by Phillip Hoover

Easy to install and adjust. To control a lead foundry kettle containing a salt bath with a temperature of 538 °C. The device has rather large temperature differences, exceeding it by 10 ° C during control and underestimating it by 15 ° C. I've used auto calibration a few times once I hit the temperature range. It's still 10°C lower and 5-7°C higher, but during sub-cooling it performs a very short impulse control that doesn't prevent the pan from over-cooling. To use it I had to wait for the pan to reach 535C with the heater on almost all the time and then I was able to heat treat some of the brass before it crashed. I tried doing just one instance while heating and it still fell quickly after almost a minute of lag. This allowed the pan to be fully heated, which the built-in thermostat couldn't.