We offer the widest product range of low-flow (mass) flow meters and controllers on the market. Numerous styles of both standard and bespoke instruments can be offered for applications in laboratory, machinery, industry and hazardous areas.
Customer satisfaction, innovation and quality of product and service have been the cornerstones of Bronkhorst's success. Based on our experience, innovation and sense of responsibility, a relationship with Bronkhorst assures Performance for Life.
Learn more about how Coriolis-based flow meters can be used as microfluidic flow meter instead of thermal flow meters. Read the customer story of a microfluidics system builder who used Bronkhorst products.
Are you looking for technical documentation, are you interested to learn more about the measuring principles of Bronkhorst products, or you do want to get in contact with a Bronkhorst Service Engineer? This section will guide you to the relevant service & support topics.
Bronkhorst High-Tech BV the leaders in Mass Flow Meter / Mass Flow Controller technology for gases and liquids, Pressure Controllers and Evaporation Systems.
Imagine what a thermal mass flow meter does: this device measures the low mass flow rate of gases or liquids by using tiny amounts of heat!
Learn more about thermal mass flow meters:
Thermal mass flow measurement is all about heat transfer. When a gas or liquid flow passes a heated surface, it will take away the heat from the surface, absorbing this heat into the fluid. In a sense, such a flow has a cooling effect on the heated surface. The larger the flow, the more the heated surface will be cooled. By recording how much additional (electric) power is required to keep the cooled surface at the original temperature, you can calculate the amount of heat that is absorbed into the liquid flowing along the surface.
Thermal mass flow measurements rely on thermal properties of the fluid, such as its specific heat capacity. The specific heat capacity of a liquid or gas is a characteristic material property of that fluid. It defines the rise in temperature of that fluid in degrees Celsius when a certain amount of heat energy is absorbed into the fluid. The mass of the fluid is relevant: 2 grams of fluid can absorb twice as much heat as 1 gram of the same fluid. This applies to static fluids as well as to moving fluids, so for low liquid or gas flows.
Thermal mass flow measurement makes quite straightforward use of this basic physical principle, which relates the flowing mass (in grams per second) to the applied power (in Joules of heat per second) with specific heat capacity (in Joules per gram per degree Celsius) and heat-induced temperature difference (in degrees Celsius) as proportionality factors.
This direct relationship between thermal properties of the fluid and its mass has the advantage that a mass flow rate is measured, which is not influenced by varying process conditions such as changes in temperature or pressure. Read more about the relationship between mass flow and volume flow. In many production and R&D processes such as chemical reactions, mass is the important variable, and not volume.
Check out the thermal mass flow meters we have available for you in our portfolio.
Bronkhorst High-Tech designs and manufactures innovative instruments and subsystems for low-flow measurement and control for use in laboratories, machinery and industry. Driven by a strong sense of sustainability and with many years of experience, we offer an extensive range of (mass) flow meters and controllers for gases and liquids, based on thermal, Coriolis and ultrasonic measuring principles. Our global sales and service network provides local support in more than 40 countries. Discover Bronkhorst®!