Blog

Category: Flow measurement

  • External Ion Gauge Vacuum Control System

    App Note: External Ion Gauge Vacuum Control System Research projects involving isolated chambers with decomposing organic components often use rotometers. The external ion gauge vacuum control system uses a special configuration of the Alicat single valve pressure controller. Alicat’s External Ion Gauge Vacuum Controller was designed specifically for the vacuum coating industry. This innovation circumvents […]

  • Testing a Tube Bore for Imperfections

    App Note: Testing A Tube Bore For Imperfections The engineers at ACME Small Bore are up to it again. This time they are testing bore imperfections in .001 bore tube. How small is that? Really, really small. He will pass a ported-hollow rod between two o-rings using a highly accurate, precision motor. This rod pressurizes […]

  • Filter Characterization with Differential Pressure

    App Note: Filter Characterization with Differential Pressure   An Alicat Differential Pressure Controller is used to characterize a filter’s flow vs. a pressure drop curve. The PC-15PSID-D pressure controller is used to set the pressure drop across the filter. The M-10SLPM-D mass flow meter is used to measure the flow rate required to generate that […]

  • Using Mass Flow Rate to Replace Pin Gauge Testing

    App Note: Using Mass Flow Rate to Replace Pin Gauge Testing Companies continually seek ways to cut costs and improve cycle times. Alicat routinely receives inquiries from customers looking to leverage our technology to accomplish those goals. A customer recently contacted us hoping to improve the speed and reliability of his go/no-go test. The test […]

  • Even Faster (and Simpler) Leak Checking

    App Note: Even Faster (and Simpler) Leak Checking Fast and accurate leak checking can be a complicated process requiring a rather complex setup. When the Device Under Test (DUT) is subjected to a constant pressure within a closed system, any resulting flow is a direct measure of the DUT’s leakage. This test requires both stable […]

  • Faster Leak Checking

    App Note: Faster Leak Checking Many processes require a fast, accurate and reliable method for leak checking components. This can be accomplished by utilizing an Alicat Scientific M Series Mass Flow Meter sized appropriately for the expected leak rate and an Alicat Scientific PC3 Series Remote Sensing Pressure Controller sized for the required pressure. Alicat […]

  • In-House Check of Gas Chromatograph Operation

    App Note: In-House Check of Gas Chromatograph Operation Gas chromatographs (GCs) detect materials at molecular level by preparing a sample of the material that is “carried” on a gas stream into the GC. The carrier gas flow stream is sent into small capillary flow tubes and then into detectors to sense and quantify the suspected […]

  • Calibration of Flow Controllers for Air Canister Sampling

    App Note: Calibration of Flow Controllers for Air Canister Sampling Canisters built for air sampling draw air into them using vacuum and passive flow control. With no more of a user interface than a simple screw adjustment, the integrated flow controllers require connection to a volumetric flow meter to establish their test flow rates. The […]

  • Measuring Bidirectional Air Flow from Furnace Bellows

    App Note: Measuring Bidirectional Air Flow from Furnace Bellows The flow meter is measuring the air flow to and from a contained furnace to help in maintaining consistent temperatures. Using the bi-directional meter allows for the replacement of two individual flow meters and all the associated plumbing. The temperature and pressure signals are also incorporated […]

  • Flame and Burner Monitoring

    App Note: Flame and Burner Monitoring The flow meter is used to measure the flow of fuels such as Propane, Butane, Acetylene, or Methane (Natural Gas) to a burner or flame head. Oxygen or Air flow can also be easily measured in the same device. Mass flow measurements are used to determine and regulate the […]

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