gas flow calibration Articles
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Primary Standard Gas Flow Calibration—The Only Guarantee of Accuracy
At Sierra, we have a saying: “An instrument’s accuracy is only as good as its calibration.” The accuracy of your mass flow controller (MFC) is essential in assuring the efficiency, performance, and quality of your flow meter. In many cases, if your instrumentation is not calibrated, then a decline in performance is possible due to sensor drift from the factory calibration. ...
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Calibration of gas mixers in the low flow range
Most dynamic gas mixers use flow regulators to create defined gas mixtures. QCAL Messtechnik uses thermal mass flow controllers ( MFC ) from various, renowned manufacturers. These MFCs are reliably calibrated proven by a calibration certificate – traceable to National Standards. But these calibrations are limited. The whitepaper describes 2 methods to extend the application range of gas mixers ...
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A Tale of Two Thermals: Capillary & Immersible
About: The Core Technology White Paper Series is a four part series detailing the flow technologies that allow Sierra to offer a flow solution for nearly any gas, liquid and steam application. Part 1 focuses on Sierra’s two types of thermal mass flow technologies for gas mass flow measurement and control—Capillary Thermal & Immersible Thermal. Part 2 will focus on our ...
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Experiences from a round Robin test for flue gas temperature, volume and flow measurements
ABSTRACT In Flanders, laboratories, recognised for emission measurements in the framework of the environmental legislation (Vlarem II), have to implement a quality system that meets the requirements of EN 45001 and are forced to participate in external quality controls organised by AMINAL, the Flemish Administration for environment and/or the reference laboratory for air measurements, e.g. Vito ...
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How to Specify the Best Mass Flow Meter or Controller for Your Application
A question we get a lot from our customers is how to determine which Sierra mass flow meter or mass flow controller is best for their application. Followed up by: What’s the difference between an economical mass flow controller and a premium mass flow controller. Our new video explains the differences between Sierra’s economical and premium mass flow meters and controllers (our ...
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New Developments in Thermal Dispersion Mass Flow Meters: In-The-Field Compensation for Changes in Natural Gas Composition
Introduction The flow of natural gas in pipelines is often complicated by changes in the composition of the gas. The method described in this paper solves the problem of variable composition via a new four-temperature mass flow sensor. The new (low sensor feeds its measurements into the algorithms of an advanced mathematical model that includes gas properties in its calculations. The method ...
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A neural network implemented microcontroller system for quantitative classification of hazardous organic gases in the ambient air
In this study, a microcontroller-based gas mixture classification system is proposed to use real-time analyses of the trichloroethylene and acetone binary mixture. A Feed Forward Neural Network (FFNN) structure is performed for quantitative identification of individual gas concentrations (trichloroethylene and acetone) in their gas mixtures. The phthalocyaninecoated Quartz Crystal Microbalance ...
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5 Steps to Precise Gas Calibration
Gas chromatography (GC) is a workhorse technique used to separate, identify, and quantify chemical compounds contained in a carrier gas. It is renowned for its accuracy and repeatability, but—as with any tool used to determine quantity values under set conditions— the quality of GC results depends upon operators carrying out precise gas calibration to guarantee that measured signals ...
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