The D1P series controls are proportional, infinitely variable power controller capable of delivering 1-98% of the applied line voltage to the directly connected electric heaters. This is accomplished by phase angle firing a TRIAC module. The D1P will not control heaters with high inrush current (tungsten lamps), transformers or motors.

The D2P series controls are proportional, infinitely variable power controller capable of delivering 1-98% of the applied line voltage to the directly connected electric heaters. This is accomplished by phase angle firing a dual SCR module. The D2P will control heaters with high inrush current (tungsten lamps), The D2P will not control transformers or motors.