The Differential Pressure Cone meter consists of a differential producer fixed concentrically in the center of the pressure retaining pipe by which a differential pressure can be obtained across the interface of two cone frustums via an internal port-way system. This allows the downstream pressure P2 to be measured in the center of the closed conduit. The upstream pressure P1, being measured at the pipe wall. The concept of using the center of the cone above to collect the downstream pressure has certain advantages over conventional differential pressure devices such as flow conditioning, large turndown, static mixing, wet gas usage with lockhart & martinelli values up to 0.5.