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Flow meters and controllers3/8/2024 ![]() Watch the video to learn more about How Thermal Mass Flow Meter Technology Works.Ī: Simply put, the mass flow rate is the WEIGHT of the sample, while the volumetric flow rate is the SIZE of the sample. Learn more about thermal mass flow meter technology used to measure gas flow more efficiently. View our Gas Flow Chart for more information on selecting the best MFC for your application.Ī: An industrial thermal mass flow meter measures either the mass velocity at a point in aflowinggas, or the total mass flow rate through a channel or pipe. ![]() Q: How do I select the right digital gas flow meter for my application?Ī: Selecting the right flow meter depends on several factors, including pipe size, flow rate,gas being measured, temperature and pressure of the gas, and whether the flow rate needs to be local or remote. Moreover, there are flow controllers available which are independent of fluid properties, and which can therefore control the flow rate of gases as well as liquids.Learn more about Gas Flow Measurement, by reading these Gas Flow Meter FAQs Some flow controllers are particularly suitable for gases, and some specifically for liquids. Successive strokes generate a continuous fluid flow. A motor causes gears to rotate, and the space between the teeth of two interlocking rotating gears determines the stroke volume. Their sensors measure the flow velocity and multiplied by the tube cross-section inside the device, this results in volumetric liquid flow rates.įlow Controllers using positive displacement principleĪ gear pump can be considered a volumetric flow controller according to the positive displacement principle. Moreover, with these Coriolis-based flow controllers there is no need for conversion when the device is used for other liquids.įlow Controllers with ultrasound techniqueīronkhorst ES-FLOW flow controllers control volumetric liquid flow rates through ultrasound. They operate fluid independently, which means that they can be used for varying and unknown mixtures. ![]() Sensors from the highly compact IQ+FLOW series are ideal for use in confined spaces.įlow Controllers using the Coriolis principleįlow controllers working via the Coriolis principle (such as the Bronkhorst mini CORI-FLOW series) use a direct relationship between fluid mass flow rate and mass inertia. FLEXI-FLOW devices control gas flow rates and measure temperature as well as pressure. By using a MEMS chip-based sensor for gas flow control.By using the Constant Temperature Anemometry (CTA) principle with the sensor inline in the main flow (as in the MASS-STREAM, MASS-VIEW and LIQUI-FLOW series), for example for robust applications with slightly moist gases or for liquids.Flow controllers using a bypass sensor (as in the EL-FLOW Select and IN-FLOW series), which is ideal for clean and dry gas applications.Bronkhorst has several of these thermal mass flow controllers available, each with their own sensor technique: The sensor type largely determines the kinds of flow controllers that are available.įlow Controllers based on the thermal principleįlow controllers that operate according to the thermal principle employ the heat capacity of gases or liquids to control their mass flow rate.
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