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Category: Flow measurement applications

  • Appnote: Testing a tube bore for imperfections

    When Alicat received an inquiry to test bore imperfections in 0.001 bore tubes, our engineers stepped up to the challenge.

  • Biosphere 2
    Case study: Measuring flow in Biosphere 2

    Biosphere 2: Using flow measurement to glimpse the future As the Earth’s climate changes, it is expected that ecosystems around the world will be subjected to increased water stress and/or drought. It is difficult to forecast the range of impacts climate change will have on soil, air, and water quality. In 2019, a group of […]

  • Appnote: Fast, flexible leak testing for single-use bioprocessing

    How do you know that your bioprocessing is free from costly leaks or integrity failures? Leak testing of single use systems can now be accomplished easily and quickly with an Alicat Scientific Whisper Series Mass Flow Meter.

  • Appnote: External ion gauge vacuum control system

    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 the low […]

  • Appnote: Filter characterization with differential pressure

    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 pressure drop. As […]

  • Appnote: Using mass flow rate to replace pin gauge testing

    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 required that […]

  • Appnote: Even faster (and simpler) leak checking

    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 pressure control […]

  • Appnote: Faster leak checking

    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 Scientific M-Series […]

  • Appnote: In-house check of gas chromatograph operation

    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 materials. These […]

  • Appnote: Calibration of flow controllers for air canister sampling

    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 challenge in […]

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