Brand D   Danfoss : AC / DC Drives,Pressure & Flow Control Valves Daniel Woodhead Co. Inc. : Wiring Devices and Safety Products David Brown Pumps : Pumps Data Logic : Hand held Scanners, Inductive, Capacitive, Magnetic field, Photoelectric & Ultrasonic Data Sensor : Hand held Scanners, Inductive, Capacitive, Magnetic field, Photoelectric & Ultrasonic Dold : Latching Relays & Safety Relays Domnick Hunter : Filters Delta : Pumps, Valves, Power Units & Flow Dividers, Pressure Switches Dodge Mfg Corp. : Bearings Dresser Valve & Controls : Valves, Pressure Gauges & Switches Dwyer Inc. : Instrumentation Dynisco : Pressure Transmitters / Transducers Dungs : Pressure Switches