The Model 5420 ControlIR is a 15 amp power controller designed to control the voltage supplied to one of our single lamp infrared heaters. It is available for 120, 240 and 480 volt control and comes with an 8 foot power cord. Control features are either: a manually set potentiometer, a manually set potentiometer with timer, or a 4-20mA external control signal. The 5420 uses a phase angle fired Solid State Relay (SSR) to provide precise voltage control to the heater.