Profile: Varidigm Corporaton specializes in variable speed motor controllers. Our product names are VSM-CA2 and VSM-CP2. The VSM-CA2 variable speed motor controller provides continuously variable motor speed in response to 0-10 VDC or 4-20 ma DC input signals. It incorporates soft start and soft transition between speeds, reducing device noise. The VSM-CP2 variable speed motor controller is suitable for use with either pressure or vacuum, and senses differential pressures. It interfaces with typical building controls, and controls a pressure or vacuum in response to both an analog input & a sensed pressure signal.