The automatic regulation of temperatures up to 600° C. By means of a platinum resistance regulator

A method of temperature control for thermostats or air ovens depending on the change of electrical resistance of a platinum wire with variations of temperature is described. Provided use is made of a suitable thermionic valve relay control of temperature is accurate to ± 0.1°C. at 350°C. and to ± 0.2°C. at 600°C.