Profile: Pressure Controls, Inc. is a manufacturer of pressure, flow, vacuum and absolute switches. Our F-54 Flow Switch is completely adjustable to meet specific flow controls. It is applicable to 3/8" to 6" pipe or equivalent, and is compatible with a wide range of fluids. Our products are used in public utilities, custom switches, production machines, nuclear reactors, aircraft & space vehicles, electronic component manufacturing, medical equipment and oil companies.