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.
More and more companies in varying industries are trying to make the transition to low flow solutions. In the chemical industry and food & pharma market, you see a shift towards continuous manufacturing, to reduce waste, lower downtime and more flexibility.
Liquid flow meters play an important role here. There are multiple liquid flow instruments available on the market. In our e-book ‘How to handle low liquid flows’ you can read all about the kinds of instruments and how to select the best one for your process.
In this blog we focus on the ultrasonic flow instruments. The availability in the market of ultrasonic flow meters for liquids suitable for > 1” pipe lines are enormous. Finding one for smaller line sizes is a real challenge. The major part of the ultrasonic flow meters on the market use either the Doppler Effect or Transit Time measurement. These techniques are most suitable for large bore sizes.
But… what to do with low flow rates <1500 ml/min or even down to 0.4 ml/min?
Due to the complexity of physics and technology there are not many measurement techniques in the ‘low flow’ range. In particular when looking at ultrasonic flow meters. The challenge was to find a solution to use ultrasound in tubes with very small diameters.
In close collaboration with TNO (Netherlands organization for applied scientific research) we succeeded to develop an innovative instrument using Ultrasonic Wave Technology. This technology is applied in the ES-FLOW series for measuring low liquid volume flows.
Principle of operation ultrasonic ES-FLOW flow meter
The ES-FLOW is based on ultrasonic wave technology. Measuring is done in a straight stainless steel tube with a very small internal diameter, without obstructions or dead spaces. At the outer surface of the sensor tube multiple transducer discs are located which create ultrasonic waves by radially oscillation. Every transducer can send and receive, therefore all up- and down-stream combinations are recorded and processed. By accurately measuring the time difference between the recordings (nanosecond range) the flow velocity and speed of sound is calculated.
Knowing these parameters and the exact tube crosssection, the ES-FLOW flow instrument is able to measure liquid volume flows. The distinctive character of this flow meter is that it’s capable to measure the actual speed of sound, meaning that the technology is liquid independent and calibration per fluid is not necessary. Next to that the speed of sound can be used as an indicator of the type of fluid present in the flow meter.
ES-FLOW Ultrasonic flow meters are widely used in the food & beverage, pharmaceutical, analytical and chemical market. The blog highlights the applications.
Do you know how to select the right flow meter? Selecting the right flow meter is the key to success. Check out our beginners' guide.
Flow Meters can help you improve your metering pump performance. Read our tips how to use Flow Meters in combination with your metering pump.