mass flow Articles
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Fundamentals vacuum and mass flow technology
One of the goals of these blog postings is to give readers knowledge about vacuum and mass flow technology. The Society of Vacuum Coaters has established a foundation (SVCF) with a similar goal. Dr. Don McClure (Acuity Consulting & Training) has created “The Vacuum Wizard Video”. Dr. McClure worked at both IBM & 3M and has been teaching for over 20 years about vacuum coating ...
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What is OGI quantification?
OGI quantification is a measurement of Mass Flow Leak Rate (MFLR)(the size) of a leak or concentration in ppm. Challenges of OGI quantification: Quantifying leak rate using OGI is extremely challenging. EyeCSite algorithm takes many aspects into account. Quantifying a compound: In order to quantify a compound, the detected normalized contrast at each pixel is converted into a concentration path ...
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FAQ Corner – What is turndown ratio?
We are occasionally asked for the turndown ratios of our flow meters and flow controllers. There are varying perceptions as to what this term actually means. The turndown ratio of a Mass Flow Meter (MFM) or Mass Flow Controller (MFC) defines the usable range for which it can operate while maintaining its published accuracy. It can be expressed using the following formula: A flow meter ...
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Achievement Unlocked: Brian Estep Appointed Vice Chair of ASME’s Thermal Committee
In the modern world, an Engineer must have clear focus, an ability to think critically under pressure, and a willingness to work long hours. When skills are developed over time and knowledge is refined, meaningful innovation can and does come to fruition. However, what allows one to rise above the daily grind to make a positive impact on the Engineering community at large, and bring lasting ...
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Mass flow measurement of glass fibres - Case Study
Produkt: glass fibres Einbauort: in a ...
By ENVEA
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Mass flow measurement of Waelz oxide
Customer: Manufacturer of Waelz oxide (Germany) Material: Waelz oxide Quantity: Approx. 5 t/h Installation: In the pipe Function: Precise measurement of the flow rate Evaluation unit: DIN Rail Application Residual materials containing zinc are processed using the Waelz process method which utilizes a rotary kiln. Waelz oxide is the main recovered product from this process. Up to now, ...
By ENVEA
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Influence of spray dryer parameters on exergetic performance of microencapsulation processs
Exergy analysis of fish oil microencapsulation process by spray drying was carried out. The process was performed on a mini–spray dryer and skim milk powder was used as the coating wall material. The drying experiments were conducted to find the effects of inlet drying air temperature, drying air mass flow rate, feed mass flow rate, and spraying gas mass flow rate on inlet exergy, outlet exergy, ...
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Exothermic reaction induced by high-density current in metals: possible nuclear origin
Since 1989, many experimenters worked on low-energy nuclear reactions (LENR). They face both an experimental and a theoretical dilemma: how to design simple and convincing experiments in a complex system and if the phenomenon has a nuclear origin, why do they observe no radiation. A rather simple water mass flow calorimeter was designed to study this phenomenon under different experimental ...
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Minute Flow Tip! Don’t Settle for “Good Enough
The capillary thermal technology used in every SmartTrak mass flow controller measures flow directly, at the molecular level. In essence, counting and controlling every gas molecule flowing through the instrument to achieve unmatched precision. Unaffected by upstream gas temperature and pressure fluctuations, gas mass flow control is direct and ...
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Adsorption of hexavalent chromium by crosslinked chitosan–iron(III) in an air-lift reactor
Column experiments were conducted in an airlift reactor containing a certain amount of crosslinked chitosan–iron(III) (Ch-Fe), to examine the effects of adsorbent mass, flow rate, and influent concentrations on Cr(VI) removal. The breakthrough time increased with an increase in Ch-Fe mass, but decreased with an increase in initial Cr(VI) concentration. The exhaustion time decreased with an ...
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Capillary Tube Thermal Mass Flow Meters & Controllers - A User`S Guide - White Paper
Abstract Capillary tube thermal mass flow meters directly measure the mass flow rate of clean gases and gas mixtures in lower flow ranges. A capillary tube thermal mass flow controller adds an integrally mounted flow control valve to the flow body of the mass flow meter and bom monitors the mass flow rate and controls it to be equal to a set-point value selected by the user. This paper ...
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Gas Mass Flow Control: Why Thermal Mass Flow Technology is Recommended for Best Accuracy!
It’s no secret. Price, but perhaps more importantly, performance, drive every new product acquisition you make. How important is measurement accuracy and control to your lab experiment or industrial process? It’s critical. If your flow readings are off or the flow is not controlled with precise accuracy your research is compromised, product quality suffers, and processes loose ...
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The ‘Swiss Army Knife’ of Mass Flow Controllers
Did you ever wish your mass flow controller could do it all? You’re not alone. End users ranging from machine builders to laboratory researchers are often faced with the challenge of needing flow measurement and control equipment for a wide variety of applications. Many customers call the SmartTrak 100 mass flow controller the “Swiss Army knife” of MFC’s. Finding a mass ...
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How Does a Thermal Flowmeter Work?
A thermal flowmeter works by measuring the total mass flow rate of a fluid flowing through a pipe or duct. In a thermal flowmeter’s simplest working configuration, fluid flows past a heated thermal sensor and a temperature sensor. As the molecules of the fluid flow past the heated thermal sensor, heat is lost to the flowing fluid. The thermal sensor cools down while the temperature sensor ...
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Improving accuracy in analog mass flow measurements 5th order polynomial curve fitting
Analog thermal mass flow instruments perform very accurate and repeatable measurements. These instruments are calibrated to meet an accuracy/linearity specification such as +/- 1% Full-scale. In a typical calibration, ten or twenty representative data points are recorded and analyzed and uncertainties are calculated for each data point referenced to a precision measurement standard. Careful ...
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[Minute Flow Tip Video] Mass Flow Versus Volumetric Flow Technology
When engineers and systems integrators need to measure gas flow rate in an industrial process or scientific research, there are many types of technologies to choose from. This makes selecting the right gas flow meter a challenge. In addition to technology, engineers must consider many other parameters: price for value, cost of ownership, size of footprint, application flexibility, calibration ...
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New Developments in Thermal Dispersion Mass Flow Meters
Introduction This paper describes a newly developed microprocessor-based thermal dispersion mass flow meter that uses four temperature sensing elements in its flow sensor instead of the traditional two elements and automatically manages changes in gas selection, gas temperature, gas pressure, and outside temperature. This new mass flow meter is ideally suited for apportionment applications in ...
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Minute Flow Tip Video - Mass Flow Versus Volumetric Flow Technology
When engineers and systems integrators need to measure gas flow rate in an industrial process or scientific research, there are many types of technologies to choose from. This makes selecting the right gas flow meter a challenge. In addition to technology, engineers must consider many other parameters: price for value, cost of ownership, size of footprint, application flexibility, calibration ...
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Desired Characteristics of a Thermal Mass Flow Sensor - Part 1 of 2
This is part 1 of a 2 part blog on Thermal Mass Flow Sensor. We will describe the desired characteristics of a thermal mass sensor in Part 1 and Part 2 will discuss the operation of the 300 Series flow sensor (Patent #6,125,695) from Teledyne Hastings. A thermal mass flow meter consists of the following: Electronic Circuit Card Flow Sensor Bypass Shunt Base A cutaway is shown in the ...
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Direct Mass Flow or Volumetric: The Thermal Flow Meter Technology Advantage!
In today’s world where everyone is watching the bottom line, you need high performance, cost-effective instrumentation—and capillary thermal mass flow meters and controllers have been proven to meet this criteria in a wide range of process applications. Thermal mass flow technology is an industry standard for mass flow control of gases because it measures flow directly, at the ...
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