{"id":44364,"date":"2025-03-13T10:43:56","date_gmt":"2025-03-13T10:43:56","guid":{"rendered":"https:\/\/www.alicat.com\/?post_type=support&#038;p=44364"},"modified":"2026-01-23T17:56:54","modified_gmt":"2026-01-23T17:56:54","slug":"was-ist-der-unterschied-zwischen-massendurchfluss-und-volumendurchfluss","status":"publish","type":"support","link":"https:\/\/www.alicat.com\/de\/support\/what-is-the-difference-between-mass-flow-and-volumetric-flow\/","title":{"rendered":"Massendurchfluss vs. Volumendurchfluss"},"content":{"rendered":"\n[et_pb_section fb_built=&#8221;1&#8243; custom_padding_last_edited=&#8221;on|phone&#8221; _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; custom_padding=&#8221;|4vw|5px|4vw|false|true&#8221; custom_padding_tablet=&#8221;|4vw|5px|4vw|false|true&#8221; custom_padding_phone=&#8221;4rem||||false|true&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][et_pb_row _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; custom_padding=&#8221;10px||10px||false|false&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][et_pb_heading title=&#8221;Mass Flow vs. Volumetric Flow&#8221; _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][\/et_pb_heading][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; custom_padding=&#8221;10px||10px||false|false&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][et_pb_text _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;]Understanding the difference between <a href=\"https:\/\/www.alicat.com\/support\/what-is-mass-flow\/\">mass flow<\/a> (standardized volumetric flow) and volumetric flow is essential when selecting the right instrument and flow measurement technology for your application. Both methods provide valuable information, but they serve different purposes depending on the conditions and requirements of the process.[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; custom_padding=&#8221;10px||5px||false|false&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][et_pb_divider _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][\/et_pb_divider][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=&#8221;1_2,1_2&#8243; _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; custom_padding=&#8221;10px||0px||false|false&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][et_pb_column type=&#8221;1_2&#8243; _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][et_pb_heading title=&#8221;Mass Flow&#8221; _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; title_level=&#8221;h2&#8243; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][\/et_pb_heading][et_pb_accordion _builder_version=&#8221;4.27.5&#8243; _module_preset=&#8221;default&#8221; hover_enabled=&#8221;0&#8243; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221; sticky_enabled=&#8221;0&#8243;][et_pb_accordion_item title=&#8221;What is mass flow rate?&#8221; open=&#8221;on&#8221; _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;]<p><a href=\"https:\/\/www.alicat.com\/support\/what-is-mass-flow\/\"><strong>Mass flow<\/strong><\/a> represents the actual <strong>number of molecules<\/strong> moving through a system, regardless of temperature or pressure changes. \u200b<span class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem]\">This makes mass flow ideal for applications that require a consistent amount of molecules, despite varying conditions.<\/span><\/p>\n<ul>\n<li><strong>Common units<\/strong>: Standard liters per minute (SLPM), standard cubic centimeters per minute (SCCM), normalized <span>liters per minute (<\/span><span>NLPM), normalized cubic centimeters per second (NCCS).<\/span><\/li>\n<li><strong>Measurement basis<\/strong>: Number of gas molecules in motion, referenced to standard temperature and pressure conditions <span data-teams=\"true\">(e.g., 25\u00b0C and 14.696 PSIA, -0\u00b0C and 100 kPa)<\/span>.<\/li>\n<li><strong>Considerations<\/strong>: Because mass flow calculations standardize conditions, they provide consistency when comparing flow rates across different settings.<\/li>\n<\/ul>\n<p><span data-olk-copy-source=\"MessageBody\">Mass flow or also called &#8220;true mass flow&#8221; refers to the measurement of the mass of a fluid passing through a given point per unit time, typically expressed in units such as kilograms per second (kg\/s).\u00a0<\/span> This is most commonly used in Coriolis technology, and is available on our M\/MC-Series line under &#8220;engineering units&#8221;.<\/p>[\/et_pb_accordion_item][et_pb_accordion_item title=&#8221;Where it is most applicable?&#8221; _builder_version=&#8221;4.27.5&#8243; _module_preset=&#8221;default&#8221; hover_enabled=&#8221;0&#8243; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221; open=&#8221;off&#8221; sticky_enabled=&#8221;0&#8243;]<strong>Precise gas measurement and control<\/strong> become simpler with this approach, as it maintains a constant molecule count regardless of temperature or pressure changes. Because mass flow functions as a form of molar flow measurement, it delivers consistent results in various processes. Some example mass flow applications:\n<ul>\n\t<li><a href=\"https:\/\/www.alicat.com\/articles\/diy-gas-mixing-with-alicat-instruments\/\">Gas mixing applications<\/a> \u2013 Ensures accurate gas ratios, as mass flow aligns with molar flow measurements, avoiding confusion with volumetric ratios.<\/li>\n\t<li><strong>Custody Transfer<\/strong> \u2013 Provides precise measurement of gas mass for billing and compliance.<\/li>\n\t<li><strong>Bioreactors<\/strong> \u2013 Regulates <strong>oxygen and CO\u2082 levels<\/strong> using <a href=\"https:\/\/www.alicat.com\/support\/scaling-challenges-of-bioreactor-sparging\/\">Pulse modulated sparging<\/a> for optimal oxygenation and CO\u2082 removal.<\/li>\n\t<li><a href=\"https:\/\/www.alicat.com\/support\/precision-repeatability-in-fiber-optic-manufacturing\/\">Manufacturing optical fibers <\/a>\u2013 Enables <strong>high-precision gas control<\/strong> for burner heating, thin-layer deposition, and argon flow to protect furnace elements.<\/li>\n<\/ul>[\/et_pb_accordion_item][\/et_pb_accordion][\/et_pb_column][et_pb_column type=&#8221;1_2&#8243; _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; custom_padding_tablet=&#8221;2rem||||false|false&#8221; custom_padding_phone=&#8221;2rem||||false|false&#8221; custom_padding_last_edited=&#8221;on|tablet&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][et_pb_heading title=&#8221;Volumetric Flow&#8221; _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; title_level=&#8221;h2&#8243; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][\/et_pb_heading][et_pb_accordion _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][et_pb_accordion_item title=&#8221;What is volumetric flow rate?&#8221; open=&#8221;on&#8221; _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;]<p><strong>Volumetric flow rate<\/strong>, also known as actual flow rate, measures the volume of fluid passing through a system per unit time. In other words, it quantifies the amount of space that a gas or liquid occupies as it moves through a conduit over a specified period.<\/p>\n<ul>\n<li><strong>Common units<\/strong>: Liters per minute (LPM), cubic centimeters per minute (CCM).<\/li>\n<li><strong>Measurement basis<\/strong>: The amount of space a gas or liquid takes up as it moves past a point.<\/li>\n<li><strong>Considerations<\/strong>: Since gas volume depends on <strong>temperature and pressure<\/strong>, volumetric flow measurements can change when these conditions vary.<\/li>\n<\/ul>[\/et_pb_accordion_item][et_pb_accordion_item title=&#8221;Where it is most applicable?&#8221; _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221; open=&#8221;off&#8221;]Cost-effectiveness and a focus on actual gas volume make this measurement type advantageous, particularly when density shifts have little effect on the process. It is also a suitable choice for straightforward flow-monitoring situations.\n<ul>\n\t<li><a href=\"https:\/\/www.alicat.com\/articles\/industrial-hygiene-portable-calibration\/\">Industrial hygiene<\/a> and\u00a0<a href=\"https:\/\/www.alicat.com\/support\/theory-of-operation-fp-25-field-flow-standards-for-pm-air-samplers\/\">environmental air monitoring<\/a> are two applications that utilize volumetric flow. The goal of each is to quantify the number of particles within a specific volume of air under ambient conditions.<\/li>\n\t<li>Basic flow monitoring \u2013 When gas density variations do not significantly impact the measurement.<\/li>\n<\/ul>[\/et_pb_accordion_item][\/et_pb_accordion][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][et_pb_heading title=&#8221;Choosing between Mass Flow and Volumetric Flow&#8221; _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; title_level=&#8221;h2&#8243; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][\/et_pb_heading][et_pb_text _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;]When deciding between volumetric and mass flow measurement, it is important to determine whether your application prioritizes measuring the precise volume occupied by the fluid or the exact number of molecules present.\n\n<strong>Alicat&#8217;s flow instruments offer both measurement types<\/strong>, providing flexibility to meet diverse application needs without compromise \u2014 <strong>including precise volumetric readings even when pressure and temperature fluctuate.<\/strong>[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][dvmd_table_maker _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][dvmd_table_maker_item col_content=&#8221;\nImpact of Temperature &#038; Pressure\nBest Used For\nEngineering Units\nWhen to use each&#8221; _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][\/dvmd_table_maker_item][dvmd_table_maker_item col_label=&#8221;Mass Flow&#8221; col_content=&#8221;Mass Flow Rate\nNone\nConsistency in measurement across varying conditions\nSLPM, SCCM, NLPM, NCCS\n&#8211; Need consistency under changing temperature or pressure <br> &#8211; Must record with standardized measurements&#8221; _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][\/dvmd_table_maker_item][dvmd_table_maker_item col_label=&#8221;Volumetric Flow&#8221; col_content=&#8221;Volumetric Flow Rate\nYes\nApplications where the space taken up by the fluid is important\nLPM, CCM\n&#8211; Conditions are stable and the actual amount of space taken up by the gas or liquid is desired <br> &#8211; Density changes have minimal impact &#8221; _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][\/dvmd_table_maker_item][\/dvmd_table_maker][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][et_pb_heading title=&#8221;Conclusion&#8221; _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; title_level=&#8221;h2&#8243; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][\/et_pb_heading][et_pb_text _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; custom_padding=&#8221;||0px|3px||&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;]<p>Both <a href=\"https:\/\/www.alicat.com\/support\/what-is-mass-flow\/\"><strong>mass flow<\/strong><\/a> and volumetric flow measurement methods play essential roles in different applications.\u00a0<strong>Volumetric flow<\/strong> measures the physical space a fluid occupies as it moves through a system, while mass flow quantifies the number of molecules passing through per unit time.<\/p>\n\n<p>The choice between these measurement types depends on the application&#8217;s focus: <strong>volumetric flow<\/strong> is suitable when the volume of fluid is the primary concern, whereas <strong>mass flow<\/strong> is preferable for applications requiring knowledge of the exact quantity of substance being transported, unaffected by changes in pressure or temperature. It is important to note that volumetric flow is directly influenced by the fluid&#8217;s density; changes in temperature and pressure can alter density, thereby affecting volumetric measurements.<\/p>\n\n<p>Evaluating the priority between measuring volume and substance, along with considering potential variations in operating conditions, is essential in selecting the appropriate flow measurement method.<\/p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=&#8221;1&#8243; _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; custom_padding=&#8221;1px|4vw|1px|4vw|false|true&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][et_pb_row _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; custom_padding=&#8221;0px||0px||false|false&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][et_pb_divider _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][\/et_pb_divider][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=&#8221;1&#8243; _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; custom_padding=&#8221;0px|4vw||4vw|false|true&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][et_pb_row _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][et_pb_heading title=&#8221;Alicat Mass Flow Instruments: Flexibility and Precision&#8221; _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; title_level=&#8221;h2&#8243; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;][\/et_pb_heading][et_pb_text _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; custom_margin=&#8221;||2rem||false|false&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221;]<p>Alicat&rsquo;s <a href=\"https:\/\/www.alicat.com\/support\/theory-of-operation-laminar-differential-pressure-flow-measurement\/\">laminar DP<\/a> gas flow <a href=\"https:\/\/www.alicat.com\/products\/gas-flow\/mass-flow-meter\/laminar-dp-mass-flow-meters\/\">meters<\/a> and <a href=\"https:\/\/www.alicat.com\/products\/gas-flow\/mass-flow-controller\/laminar-dp-mass-flow-controllers\/\">controllers<\/a> provide <strong>both mass and volumetric flow readings<\/strong>, allowing you to choose the most relevant measurement, compare both, or <a href=\"https:\/\/www.alicat.com\/support\/display-variable-tutorial-changing-from-mass-flow-to-volumetric-flow\/\">switch between<\/a> control modes as needed. That is why Laminar DP Alicat instruments go beyond basic flow measurement\u2014<strong>measuring all four key variables <\/strong>(mass flow, volumetric flow, temperature, and pressure) for unmatched precision.<\/p>\n\n<p>For true mass flow measurement, Alicat also offers <a href=\"https:\/\/www.alicat.com\/products\/gas-flow\/mass-flow-controller\/gas-low-flow-coriolis-controllers\/\">Coriolis devices for gas flow<\/a> and <a href=\"https:\/\/www.alicat.com\/products\/liquid-flow\/liquid-flow-controller\/liquid-low-flow-coriolis-controllers\/\">Coriolis devices for liquid flow<\/a>. The primary difference between mass flow and volumetric flow devices lies in their measurement techniques. Laminar Differential Pressure (DP) mass flow devices measure volumetric flow and apply temperature and pressure corrections to calculate mass flow, ensuring consistent readings across varying conditions. In contrast, Coriolis devices provide precise mass flow measurements regardless of the fluid&rsquo;s properties, composition, and temperature.<\/p>\n\n<p>Not sure which flow measurement suits your application best? Connect with our Application Engineers for personalized support!<\/p>[\/et_pb_text][et_pb_button button_url=&#8221;@ET-DC@eyJkeW5hbWljIjp0cnVlLCJjb250ZW50IjoicG9zdF9saW5rX3VybF9wYWdlIiwic2V0dGluZ3MiOnsicG9zdF9pZCI6IjQ1NjU0In19@&#8221; button_text=&#8221;Ask an Engineer&#8221; button_alignment=&#8221;center&#8221; button_text_tablet=&#8221;Help me choose what is best for my application&#8221; button_text_phone=&#8221;What is best for my application?&#8221; button_text_last_edited=&#8221;off|desktop&#8221; button_alignment_tablet=&#8221;center&#8221; button_alignment_phone=&#8221;center&#8221; button_alignment_last_edited=&#8221;on|tablet&#8221; module_class=&#8221;hs-cta-trigger-button hs-cta-trigger-button-171518968842 btn_transform_on_click hide-de ga_event_link_click_lead vwo-event-btn-click-ask-an-engineer&#8221; _builder_version=&#8221;4.27.4&#8243; _dynamic_attributes=&#8221;button_url&#8221; _module_preset=&#8221;default&#8221; custom_button=&#8221;on&#8221; 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