We are offering integral meter run assembly. An integral orifice assembly or integral meter run assembly is a specially designed prefabricated meter run used when a high accuracy in flow measurement is required for extremely small flow rates. It is also used when differential pressure transmitter is to be directly mounted on the assembly. This eliminates the cost of installation of differential transmitter with impulse piping to the orifice assembly. It is used for line sizes 2ã¢ï¿½ï¿½ and below.