There are various ways the components manage the power flow. Controller firing modes include zero cross, burst firing, single cycle, delayed triggering and phase angle to easily control a wide base of heater loads. Temperature regulation is required in nearly every manufacturing process, typically for the purposes of material heating, melting, drying, or forming. SCR power controllers, also called silicon controlled rectifiers (SCRs), play a critical role in temperature regulation. Their primary use is to control the flow of electricity from the grid to a heater. This function precisely regulates temperature to produce specific material effects or properties within an industrial furnace, oven, electric boiler or other thermal processing equipment.