The maximum temperature that can be reached when heating electrically powered industrial furnaces – such as furnaces for case hardening, electric arc furnaces, or smelting furnaces – depends on the kinds of heat sources that are used. JUMO offers you solid state relays and thyristor controllers suitable for resistive and resistive-inductive loads. High temperature heating elements made out of silicon carbide or molybdenum disilicide can be controlled just the same as short, medium, and long-wave infrared radiators. The thyristor controllers have current limiting and optional control algorithms to ensure a consistent power output.