Theta heater controllers, newly launched by theta controls, are the best option for controlling electrical heating as well as industrial power. These controllers have great significance in the industrial world. They improve the temperature control accuracy, increase heater life and reduce plant down time. The standard range of theta heater controller is 1 kw-100kw and any order above the standard range is considered as per personal requirements. These controllers can either be of open type or closed in one panel with indicators. There are basically two control types in theta heater controller, phase angle controller with built in voltage, current, power regulation loops and the other, zero crossover controller with integral cycle switching action. These give the best quality assuring of application support and timely service.