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Tag: gas mixing

  • What is the difference between mass flow and volumetric flow?

    What is the difference between mass flow and volumetric flow? Understanding the difference between mass flow and volumetric flow is important when determining which flow instrument is right for your application. Here we introduce the concepts of mass flow and volumetric flow and discuss use cases for each measurement. What is a volumetric flow rate? […]

  • Correcting flow data after choosing the wrong gas in Gas Select

    Correcting flow data after choosing the wrong gas in Gas Select Correcting flow data after choosing the wrong gas is fairly straightforward. As both the mass flow rate and volumetric flow rate depend on gas viscosity, having the wrong gas selected leads to readings that are approximately off by the ratio of the viscosities. This […]

  • close up of flowing gas
    Alicat controllers in gas mixing systems

    Gas mixing systems Some industries require custom gas mixes for the proper operation of their production processes including: Welding gases Furnace atmospheres Vacuum process control Sensor calibration This requirement is often filled by purchasing pre-mixed gases from a compressed gas supplier. An alternate method of satisfying this need is to create the required mixture from […]

  • VICI makes air pollution analyzer calibrators using OEM mass flow controllers for gas mixing

    VICI makes air pollution analyzer calibrators using OEM mass flow controllers for gas mixing Valco Instruments Co. Inc. (VICI) makes systems used to verify the accuracy of analytical data from air pollution monitoring, industrial hygiene surveys, odor surveys, and other gas measurement devices. Their Metronics Dynacalibrators® model utilizes Dynacal® permeation devices to generate and deliver […]

  • gas flow
    How accurate are Alicat multi-gas calibrations?

    How accurate are Alicat multi-gas calibrations? Most Alicat mass flow meters and controllers are laminar differential pressure-based, calculating mass flow rate from a combination of gas properties and the pressure drop across a laminar flow element. Each mass flow instrument can be used to measure/control the flow rate of any of the 98-130 pre-loaded gas […]