Abstract: This invention relates to an improved high pressure mounting for removably positioning pitot tube type flow measurement devices in a pipeline where the mounting includes a hollow tubular collar welded to the pipe in alignment with a probe-receiving opening therein and which is sized to slidably receive the body of the probe for movement into and out of the pipe, a relatively deformable and compressible ferrule encircling the probe body movable into abutting relation to an annular seat provided on the end of the collar remote from the welded end thereof, and a compression nut adapted to be screwed onto a threaded end of the collar adjacent the seat and cooperate therewith and with the ferrule therebetween to crimp the latter tightly around the probe thus sealing the probe in a fixed operative position, the improved positive lock which is characterized by adding an externally-threaded male extension to the compression nut, providing the probe body with a fixed abutment-forming projection exposed beyond said ext

Abstract: This invention relates to an improved pitot tube type flow measuring instrument for use in pipes and other conduits characterized by a generally diamond-shaped sensor portion constituting a bluff body for splitting the flow that includes at least a large-radiused leading edge in which three or more impact ports are located, a pair of planar portions diverging rearwardly from the leading edge to a transversely-spaced pair of much shorter-radiused side edges that cooperate therewith and the downstream-facing portion of the bluff body to define flow separation zones capable of stabilizing the flow coefficient over a broad range of flow conditions provided that the distance separating them is at least five times either of their radii.