The control freaks will be happy to know that Evenheat uses only Special Limits of Error thermocouples and thermocouple lead wire.
Thermocouples are made of various grades of material. Among those is the grade of "Special Limits of Error". Special limits thermocouples and thermocouple wire offer an error of +/-2° or 0.4%, whichever is greater. In comparison, Standard Limits offers +/-4° or 0.75%, whichever is greater.