Rs electronics has developed heater controllers in range of up to 4 kw for 230 v applications and up to 80 a for 440 v application. These heater controllers are useful for controlling heaters in ovens, solder systems, electro systems, packing industry, plastic industry, rubber industry, food industries, etc. The company provides these heater controllers with temperature controller/pid controller to get good results. The heater controllers are available with technical specification like 0-5 v dc or 4-20 ma dc input control according to specification and output operates in accordance with phase angle control principle. The systems are equipped with a built-in synchronization circuit in order to achieve phase angle control; proportional output to the input voltages or input currents. The controllers come with linearised and reproducible transfer function. The heater controllers are available with salient features like faster switching, logic compatibility, no electro-mechanical noise, no contact arching, long life, high reliability more than 10-9 operation, etc.