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.
Suppose you would like to supply a gas, vapour or liquid to a chemical process, then mass flow controllers are suitable devices. They are used in processes regarding:
A mass flow controller is a compact device that supplies one or more chemical compounds – gas or liquid - to a process by accurately controlling the flow rate. To this end, the flow rate of the compound(s) to be supplied is set electronically by a voltage, current or digital (fieldbus) source. The amount of gas or liquid that flows through the device is measured by an internal sensor. This measurement value is compared with the setpoint value. To achieve that both values are equal, a control valve will vary the size of the flow passage (by opening or closing).
In the basics, a mass flow controller is a mass flow meter (i.e. the sensor) combined with control valve and feedback electronics between sensor and valve. This control function (also known as PID, proportional-integral-derivative) is often a standard part of the device electronics, whereas the control characteristics can be adjusted for fast or smooth control by means of user software.
Simply because in many research and production processes, the important variable is mass and not volume. Mass flow controllers can provide direct control of mass flow. From an economical point of view, the mass of a gas or liquid is an independent value, no matter what the operating temperature or pressure of a process is. Therefore, mass flow devices are immune to fluctuations in temperature and pressure of the incoming flow.
To meet users' preferences for expressing compressible gas flow as volume flow anyway, conditions are agreed upon under which mass flow is converted into volume flow. These ‘normal’ reference conditions are a temperature of 0 °C and an absolute pressure of 1 atm, indicated by the subscript “n” in the unit of volume used.
A thermal mass flow controller uses the heat capacity of liquids or gases to control their mass flow rate. Within the Bronkhorst portfolio we have multiple thermal mass flow controllers that each have their own sensor technique:
A Coriolis-based mass flow controller (e.g. the mini CORI-FLOW series) is often the first choice to measure and control liquid flow. Besides that, they very well can be used for gas flow processes as well. Coriolis based mass flow controllers have some advantages compared to thermal-based instruments:
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A new era of Mass Flow Control; FLEXI-FLOW Mass Flow Controllers. To measure & control gas flow, temperature and up/downstream pressures.
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