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.
Empa, one of our European research customers, uses a Bronkhorst evaporation system named CEM (Controlled Evaporation & Mixing) in their quest to develop hydrophobic coatings for water-repellent fabric. Empa, a Swiss Federal Laboratory for Materials Science and Technology and a part of the ETH Domain, employs a CEM system comprising a liquid mass flow meter and a gas mass flow controller. This system actively evaporates silicon organic HMDSO. Empa uses plasma polymerisation to deposit thin (nanoscale) layers on top of fabrics and fibers. In this process flow controllers add the polymer precursors.
The vacuum plasma (7x10e-2) polymerization process at Empa, activates the liquid silicon-organic compound hexamethyldisiloxane (HMDSO - C6H18OSi2). The primary objective is to polymerize and deposit the resulting vapor onto the surface of the fiber, creating a hydrophobic coating. To achieve a stable and consistent flow of the polymer precursor vapor, precise control is required for both the liquid HMDSO flow and the carrier gas flow. The HMDSO vapor is introduced into the plasma chamber at defined flow rates, where higher rates facilitate rapid deposition and processing.
The Bronkhorst CEM evaporation system evaporates the organic silicon compound HMDSO (hexamethyl-disiloxane). In this process, liquid HMDSO is supplied from a pressurised container at ambient temperature, and the flow rate is measured by the liquid mass flow meter (mini CORI-FLOW series) and its mixing valve. This valve in the CEM system is also responsible for introducing and mixing the liquid HMDSO with the carrier gas, argon in this case, from a thermal mass flow controller (EL-FLOW Select series). The mixed and vaporised fluid then passes through the temperature-controlled heat exchanger, enabling the liquid phase to change to the vapour phase. This vapour flow is then introduced into the reactor, which operates under vacuum conditions at 7x10e-2 Torr. The entire evaporation and reaction process is controlled via a supervisory system. Thanks to this configuration, HMDSO can be evaporated over a wide range, from 1 to 30 grams per hour. The results demonstrate a very stable, precise, consistent and efficiently regulated vapour flow.
The evaporation process in this configuration uses LabVIEW software for simple and efficient visualization. In fact, a CEM vapor module has been specially designed for Bronkhorst instruments, enabling easy retrieval of measurement and control parameters, in the same way for all instruments in the Bronkhorst range.
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®!