Abstract: A system is disclosed for the extraction of a representative sample of a processed medium, flowing in a process stream under a first pressure force, and the delivery of the extracted representative sample to a mixing chamber along with a diluent medium. The system includes a source of a second pressure force connected to the mixing chamber, the second pressure force having a value less than the first pressure force of the process stream. An extraction flow control device connects the mixing chamber to the process stream and is operable into a first or alternatively a second position. When operated in the first position the second pressure force of the mixing chamber is connected to the first pressure force of the process stream and, responsive to the pressure force difference, a portion of the processed medium is drawn from the process stream through the extraction flow control device. A source of diluent medium under a third pressure force is further included connected to the extraction flow control device.

Abstract: A pipeline system of a process facility has a plurality of equipments, the equipments including at least one pipeline for providing a channel for a fluid of a process to flow. The process of the process facility is controlled by a process control system. The equipments also include at least one device for measuring a process variable of the fluid. The device comprises a sensor element for sensing a predetermined process variable of the fluid flowing in the pipeline to output a signal containing information about the process variable being measured and containing information about the fluid flowing in the pipeline. The device further includes a first filter to pass a first component of the signal containing the information of the process variable and a second filter to pass a second component of the signal containing the information about the fluid flowing in the pipeline.