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.
Bronkhorst instruments are used for numerous applications in many different markets. In this section you will find an overview of the main markets for our equipment, illustrated with some typical examples of applications.
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 UK is leader in Mass Flow Meter / Mass Flow Controller technology for gases and liquids, Pressure Controllers and Evaporation Systems.
In my previous blog ‘A digital alternative to traditional VA-meters/purge meters’, I shared the ins and out about our MASS-VIEW flow meter series, a digital alternative to traditional VA-meters or purge meters.
Today, I would like to share the top 5 digital flow meter questions we often receive from our customers:
Since the introduction of this digital flow meter series, I have regularly been asked whether the instrument is also suitable for gases or gas mixtures that are not stored in the instrument by default.
Despite the fact that the pre-installed gases might be the most common gases the MASS-VIEW is used for, the wetted parts of the instruments allow to use them for other gases or gas mixtures as well.
In general, it is possible to apply a fixed conversion factor to the measurement of the MASS-VIEW, calculated with the free online calculation tool. Besides that, you can also use the FluidAdd tool from Mass Flow ONLINE, which is an additional calculated fluid curve. This tool allows you to overwrite one of the default gases.
The creation of a FluidAdd file requires the following information specified by the user:
To answer this question properly, it is actually required to start with a closer look at the physical properties of gases. In physics and engineering, mass flow rate is the mass of a substance which passes per unit of time. Considering a sub-atmospheric flow rate, you can imagine that the gas flow rate needs to be (significant) higher to transport a particular amount of gas (mass).
Since the MASS-VIEW series operate on the principle of direct thermal mass flow measurement, the combination of its structural design and the increased (volumetric) gas flow rate in sub-atmospheric conditions might have negative side-effects to ensure a proper measurement. Therefore, the measurement output cannot be guaranteed in sub-atmospheric conditions.
Humid air for instance can be seen as a mixture of water and air and additionally to this, dust and oil might be present in the process gas. The physical properties of those mixtures will differ from those of dry and clean air. As from a technical point of view, this flow meter series is able to deal with the humidity as long as there is no condensation inside the flow channel. However, the inaccuracy of a thermal mass flow meter calibrated for dry air could increase when humid air is applied instead of dry air.
As for the oil and dust; potential clogging of a thermal mass flow instrument in general is just around the corner. However, the thru-flow nature of MASS-VIEW’s working principle from Bronkhorst is relatively insensitive to possible clogging in potentially polluted industrial gas applications. However, the insensitiveness does not mean that clogging is impossible. It is highly recommended to filter those process gases before it enters the mass flow meter.
Mass flow instruments, in fact all process instruments, experience wear from the conditions of the process in which they are installed. Temperature, electronic component tolerance shift, contamination built up over time (even very slight), plus other factors will all contribute to affecting the accuracy of an instrument.
Your instruments should regularly undergo a calibration check if not a recalibration. But how often? Because the nature of each application is different (conditions, running time, etc.) a calibration interval can last three years or three months.
Bronkhorst instruments do not have specified due dates for calibration. We suggest that our instruments be calibrated every year. However, based on the application conditions, and perhaps company quality procedures, each customer must determine when they need to send in an instrument for recalibration.
Properly calibrated instruments will be more accurate, more reliable, help ensure consistency, and help improve production yields.
These digital flow instruments have built-in programmable alarm functions available to make the flow meters as versatile as possible. These functions enable the user to get warned for or in cases of:
When alarm settings are activated, the flow alarm will automatically open or close Alternating Current (AC) electrical circuits, activating warning lights, bells, pumps or other process control equipment. In fact, today’s highly flexible and versatile alarm trips can be found working in a wide range of applications, under an impressive list of pseudonyms.
As a standard feature, the MASS-VIEW flow meter has two alarms connected to a relay/switch. One side of the switch is connected to ground (pin 4, 0 Vdc) and the other side is connected to Pin 3 (alarm high).
The MASS-VIEW flow meter has two alarms connected to a relay/switch. This relay is already included in the MASS-VIEW. One side of the switch is connected to ground (pin 4, 0 VDC) and the other side is connected to Pin 3 (alarm max.).
The other relay is also with one side connected to ground (pin4, 0 VDC) and the other side is connected to Pin 5 (alarm min).
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Bronkhorst has developed a thermal mass flow meter series (called MASS-VIEW) which is the digital high-tech alternative to the traditional VA flow meters. Check out the 9 reasons why to use a thermal mass flow meter instead of a traditional purge meter.
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