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  2. Mass flow controller - Wikipedia

    en.wikipedia.org/wiki/Mass_flow_controller

    A mass flow controller is designed and calibrated to control a specific type of liquid or gas at a particular range of flow rates. The MFC can be given a setpoint from 0 to 100% of its full scale range but is typically operated in the 10 to 90% of full scale where the best accuracy is achieved.

  3. Gas blending - Wikipedia

    en.wikipedia.org/wiki/Gas_blending

    Constant mass flow supply: Precision mass flow controllers are used to control the flow rate of each gas for blending. Mass flow meters may be installed on the outputs of the mass flow controllers to monitor the output. The gases may be passed through a static mixer to ensure homogeneous output. Continuous gas blending is used for some surface ...

  4. Thermal mass flow meter - Wikipedia

    en.wikipedia.org/wiki/Thermal_mass_flow_meter

    Thermal mass flow meters, also known as thermal dispersion or immersible mass flow meters, comprise a family of instruments for the measurement of the total mass flow rate of a fluid, primarily gases, flowing through closed conduits. A second type is the capillary-tube type of thermal mass flow meter.

  5. Mass flow meter - Wikipedia

    en.wikipedia.org/wiki/Mass_flow_meter

    The mass flow rate is the mass of the fluid traveling past a fixed point per unit time. The mass flow meter does not measure the volume per unit time (e.g. cubic meters per second) passing through the device; it measures the mass per unit time (e.g. kilograms per second) flowing through the device. Volumetric flow rate is the mass flow rate ...

  6. Flow measurement - Wikipedia

    en.wikipedia.org/wiki/Flow_measurement

    When gases or liquids are transferred for their energy content, as in the sale of natural gas, the flow rate may also be expressed in terms of energy flow, such as gigajoule per hour or BTU per day. The energy flow rate is the volumetric flow rate multiplied by the energy content per unit volume or mass flow rate multiplied by the energy ...

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  8. Pressure regulator - Wikipedia

    en.wikipedia.org/wiki/Pressure_regulator

    Supplementary oxygen may also be dispensed through a regulator which both reduces the pressure, and supplies the gas at a metered flow rate, to be mixed with ambient air. [8] One way of producing a constant mass flow at variable ambient pressure is to use a choked flow, where the flow through the metering orifice is sonic. For a given gas in ...

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