Patent ID: 9551601
Date: 2017-01-24
CPC Classifications: G01F

Claim:
1. A process variable monitoring system for measuring a process variable indicative of a flow rate of a process fluid in a range of different sized process pipes, the system comprising: a process variable transmitter; a pressure sensor in the process variable transmitter; an averaging pitot tube (APT) primary element having a distal region including one or more slots, the APT primary element being extendable into the process pipe to couple process pressures of the process fluid to the pressure sensor such that the pressure sensor provides as an output pressure measurement indicative of the flow rate of process fluid in the process pipe, wherein the distal region including the one or more slots is sized such that for larger diameter process pipes the one or more slots span a smaller percentage of the pipe diameter than for smaller diameter pipes; and a mounting assembly configured to mount the APT primary element to the process pipe and provide a process seal such that a length of the APT primary element extending into the process pipe is adjustable for different sized process pipes, the mounting assembly comprising a ferrule surrounding the APT primary element and a compression fitting which compresses the ferrule to create a ferrule process seal.