Founded in 1972, Aalborg Instruments & Controls Inc. is a primary manufacturer of precision instrumentation for flow measurement and control. Aalborg Instruments & Controls Inc. manufactures rotameters, mass flow controllers, vortex flow meters, pumps, valves and many other flowmeters. The company also offers accessories, including optical sensor for rotameters, IO signal conditioner, SDPROC microprocessor driven command module, TOT totalizer and PSV-D driver module. The firm has two divisions; The Variable Area Division, which manufactures a diversified line of flowmeters and needle valves and the Electronics Division, which produces state-of-the-art thermal mass flowmeters and mass flow controllers for gases and electromagnetic flow controllers for liquids and gases.