Apex Instruments Inc. is one of the leading suppliers of equipment to the petrochemical industry in the rocky mountain region. Based in Centennial, Colo., its specialty products include orifice plates as well as meters, heat exchanges, instrument filters, LACT units/metering skids and panel meters, to name a few. Some of its products include tank gauging systems, meter provers and industrial silencers. Apex Instruments Inc. distributes equipment of a roster of manufacturers, including Crystal Engineering Corp., M&J Valve, GD Engineering, Faure Herman and Philadelphia Mixing Solutions.