Category: How it works

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    What is mass flow?

    What is mass flow? A common way to measure and control flow is with a mass flow instrument, but what is mass flow? The answer to this can be approached from a number of angles, which we cover in this article. What do mass flow meters and controllers do? Most mass flow devices output a […]

  • 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? […]

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    Alicat laminar differential pressure flow measurement

    Alicat mass flow instruments operate on the principle of differential pressure-based laminar flow measurement.

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    What is laminar flow?

    What is laminar flow? To understand how Alicat differential pressure (DP) mass flow devices work, it is important to first answer the question, “What is laminar flow?” Laminar flow is key to the operating principle of Alicat DP instruments, enabling them to output highly accurate mass flow rates across very wide measurement and control ranges. […]

  • Calibration, validation, and verification

    Calibration, Validation, and Verification Calibration, validation, and verification are different but interrelated processes that are often confused. Ask three people what these terms mean, and you will get three different answers. At a basic level, the three terms may be defined as follows: Calibration ensures the measurement accuracy of an instrument compared to an known […]