The S-Class heating controller are used for control-ling thermal appliances. They provide the same con-trol and communication functions as the FLUXRON induction systems. The heating elements are driven through external power switches such as contactors, ET hybrid switches or SSR relays, using a freely con-figurable pulse width modulation (PWM) based on the setpoint requirements of the PID control. Up to four temperature sensors, two hall-knob, a touch slider, and display elements can be connected.