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.
Traditionally, dosing- or metering pumps are believed to be accurate. For every rotation of the pump, the pump head will displace a known volume of a liquid. This results in a known pumped volume over time based on the amount of rotations. In practice however, it appears to be difficult to achieve a high level of accuracy. A deviation of a few percent is not exceptional. Why?
Inaccuracies like this are caused by many changing process conditions, such as:
This video explains the principle of operation of the ultrasonic volume flow meter and how the flow can be adjusted through the combined used of a ultrasonic volume flow meter and a gear pump.
This video explains the mechanism of a Coriolis mass flow meter and how the flow can be adjusted quickly and precisely through the combined use of a Coriolis mass flow meter and a gear pump.
Just by adding a mass flow meter or volume flow meter to your process, you will not get the best solution as you still need an additonal PID controller to drive a pump to achieve the desired dose or flow. The PID controller is used to compare the real flow signal with the desired flow. The Bronkhorst Coriolis mass flow meters and ultrasonic volume flow meters have an integrated PID controller. So, by using these instruments it is not necessary to add an additional PID controller. You do not have to include the pump in the control system anymore, you just give a set point demand to the flow meter and it will drive the pump to the desired flow. The big advantage here is that the mass flow meter or volume flow meter use a high frequency signal, which makes this way of controlling the pump much faster than the traditional way of pump control.
It's like a black box: You indicate your desired flow and the black box generates this flow for you, stable and with a high accuracy as well.
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The combination of a Coriolis mass flow meter with pump can be used for various dosing applications such as dosing liquid colourants (dye) to detergent, laundry care products and cleaning products.
Also the ES-FLOW ultrasonic liquid volume flow meter can be used in comination with a pump. It makes it easy to dose additives, such as colourings, flavourings and acids have to be added to the production process.
For accurate control of liquid flows in a continuous pharmaceutical manufacturing application Bronkhorst designed and supplied a complete skid solution that combined a Coriolis mass flow meter with a gear pump, pressure sensor and a number of liquid filters and valves.
Besides these combinations, Bronkhorst can also facilitate customers in more complex solutions, integrating mass flow measurement and control equipment into boxes, modules or cabinets, designed in collaboration with our customers.
A liquid dosing module like this can be used for ratio control, dosing, filling, mixing and blending.
Low flow dosing solutions can be used in many different industries. For example: In processes where liquid have to be dispensed into a container that will require quality assurance. If you use a flow meter to control the dose you can achieve 100% quality checking of your product with reduced human input. Or if you need to dose additives, performance chemicals or mix liquids then the ability to control the flow of the additive and know what that flow is can be a huge advantage to the outcome of the application.
In this application a WADose high pressure pump, a simple yet complete solution, has been used for dosing low-flow liquefied gases.
Within chemical industry, the supply of organic solvents is a frequently occurring operation. In this context, Bronkhorst delivers devices to accurately dose small flows of organic solvent.
In this application a solution has been shared for dosing very small amounts of pharmaceutical agents in a liquid state, using Coriolis mass flow controllers and a high pressure pump.