Watonga Machine & Steel Works, 12855 US Highway 270, Watonga, OK 73772, US

Established in 1985, Energy Meter Systems Inc. is one of the leading manufacturers of piping and measurement systems for application in the United States. Based in Hennesse, Okla., the company manufactures and installs natural-gas meters and chemical measurement systems, pressure/temperature/flow-control prepackaged systems and piping assemblies, to name a few. It also offers a series of services in inspection, auditing, repair and start-up services for all its measurement system products. Its list of other products includes skid-mounted measurement stations, meter tubes, filter-regulator packages, pig launchers receivers, drip pots, town-border stations, turbine-meter tubes and other skid building packages.