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.
Fuel cells play an important role in our energy transition supporting an energetic future. They make it possible to transform hydrogen from renewable energy sources back to electricity. Mass flow control is a key factor in fuel cell development and testing, as fuel cells highly depend on fluidic parameters during testing.
In this blog I will explain how mass flow control contributes to this development focusing on the thermal-bypass technology for low density gases.
A new fuel cell design depends on a lot of parameters. And to test it correctly, you need to know the properties and number of gaseous parameters, as accurately as possible. An important lesson I learned from a tricky school assignment, is that the final test result is never better than how precise your input is controlled.
Fuel cell test houses, universities and fuel cell test equipment manufacturers benefit from this basic knowledge when they use our flow control and measurement technology.
For those of you who are not familiar with fuel cells, I start with some basics; For example, PEM-type fuel cells (Polymer Electrolyte Membrane), depend on executing an electrochemical process, amongst other types of fuel cells. Therefore, it can only supply electrical current when it receives the following fluids:
The efficiency of the fuel cells depends on the composition and amount of humidified hydrogen and air, their flow speed, pressure conditions, and the pressure difference across membranes. The sweet spot for optimal performance is also influenced by external factors, such as the required electrical load together with ambient and fluid temperatures.
Another factor in play is the fuel cell design itself, and its attached parameters, such as membrane thickness, type of electrolyte, active electrode surface area, and the effectivity of gas diffusion layers.
Below graph gives an indication of mass flow control instruments as seen in test-setups. It shows where you can apply our mass flow instruments. To keep it simple: The flow meters and pressure instruments take care of the main liquid-, gas- and pressure- measurement and control related tasks.You can clearly see the fluidic dependencies and interactions.
The result of any test, is as good as the sum of accuracies
The best choice to control your fuel cell related- flow, pressure and density conditions are devices based on a thermal bypass mass flow measuring technology. A mass flow controller based on this principle can achieve the most flexible, accurate and repeatable fluidic control, including:
Bronkhorst can supply instruments to support setups for a single cell stack up to stacks of 100’s of kilowatts. Our products (like the IN-FLOW ‘High-FLOW’ F-117DI series) are used for testing and for high power use or commercial use, which require wider load dynamics or highest durability.
We have mass flow control instruments available for OEM applications, laboratory applications as well as industrial versions. Check out our IN-FLOW ‘High-FLOW’ series. In case multiple gaseous fuels are used, products support on-board multi-fluid configuration.
Check our renewable energy page.
Flow controllers play an important role in producing hydrogen. Read the interview with customer Hygear in steam reforming units for hydrogen.
FLUIDAT is an online calculation tool to calculate flow rates and conversion factors for flow meters. Start calculating flow rates now!
Thermal mass flow meters are used to measure mass flow of low gas flow. A mass flow controller is a flow meter combined with a control valve.