OFI Testing Equipment, Inc. is the leading independent manufacturer of testing instruments and reagents for the Drilling Fluids, Cementing, Completion Fluids, and Wastewater Industries. In addition to a complete line of equipment, we offer innovative designs, custom engineering, and personal service. Our product line ranges from Mud Balances to Viscometers, Filter Presses to Roller Ovens, Consistometers to Complete computer control systems.