flow calibrator Articles

  • 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 ...


    By Sierra Instruments, Inc.

  • Recent Improvements in Air Flow Calibration Reference Instruments

    A key element in radiation protection programs at commercial nuclear power plants, nuclear research facilities, fuel fabrication plants and regulatory agency oversight programs of licensees is management's ability to validate the accuracy of the many air sampling instruments utilized in the facility's radiation protection air monitoring programs. The volume of air sampled in each sample ...


    By F&J SPECIALTY PRODUCTS, INC.

  • Two Detector Solution to Analyzing Sulfur

    Sulfur compounds are reactive, corrosive to pipes, and destructive to catalysts in petroleum refineries. Sulfur emission are strictly regulated globally. When released into the atmosphere sulfur dioxide converts to sulfuric acid resulting in adverse effects on human health and the environment. Sulfur detection is found useful in many other industries; therefore, detection of sulfur compounds in ...


    By Restek Corporation

  • Valve actuation at the world’s largest flow metering calibration facility

    Currently nearing completion, EuroLoop will be the world’s largest test site for industrial flow meters. Two separate circuits are available, for testing both gas meters and liquid meters. Both circuits are fully automated, making extensive use of electric and pneumatic actuators with sophisticated control systems. Situated by the New Meuse River in Rotterdam, EuroLoop will be the ...


    By Rotork

  • Calibration using 5 flow sensors saves the effort of extensive reconstruction measures

    "Abwasserzweckverband Breisgauer Bucht", a municipal association for sewage treatment in the south of Germany, operates a central wastewater treatment plant for its members (29 communities and cities). The WWTP covers a catchment area of 650km² and its treatment capacity is 600.000 population equivalents. The plant is treating wastewater from 375.000 residents as well as from industry and ...


    By NIVUS GmbH

  • 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 ...


    By Sierra Instruments, Inc.

  • The Fundamentals of the Air Sampler Calibration-Verification Process

    INTRODUCTION The calibration of an air sampling instrument using a reference air flow calibrator requires attention to scientific detail in order to establish that the instrument’s reported values are correctly stated and valid under the actual operating conditions of the air sampling instrument. DEFINITIONS For the purposes of this ...

  • Environics - Reducing calibration gas cost by up to 60%

    EPA's appendix 'M' 40 CFR 51 reduces calibration gas cost by 60%By: Terrence P. Dunn, President of EnvironicsOn May 30, 1995, the EPA published the final version of Method 205 for inclusion in Appendix M of 40 CFR Part 51 entitled, 'Verification of Gas Dilution Systems for Field Instrument Calibrations.' Continuous emissions monitoring systems (CEMS) require ...


    By Environics, Inc.

  • Specification and calibration requirements for industrial scales in pharmaceutical applications

    Introduction Performance and accuracy of industrial scales in pharmaceutical applications are covered by current Good Manufacturing Practices (cGMPs). Verification of proper operation of process scales is an important factor in finished product Quality Assurance (QA) programs. Incorrect weighing, additions of materials and components in validated processes of formulation, dispensing, and ...


    By Prime Technologies, Inc.

  • Commonly Asked Questions About Calibration Gas

    Argus-Hazco's Becky Schneider answers the most commonly asked questions about calibration gas. The questions range from disposal and refilling protocol to shelf life to MSDS availability. Argus-Hazco offers a complete line of reactive and non-reactive gases in cylinder sizes that range from 17 to 221 liters. We have a large collection of common blends and we can also accommodate virtually any ...


    By Argus-Hazco

  • Improving calibration of two key parameters in Hydrologic Engineering Center hydrologic modelling system, and analysing the influence of initial loss on flood peak flows

    Parameter calibration is a key and difficult issue for a hydrological model. Taking the Jinjiang Xixi watershed of south-east China as the study area, we proposed methods to improve the calibration of two very sensitive parameters, Muskingum K and initial loss, in the Hydrologic Engineering Center hydrologic modelling system (HEC-HMS) model. Twenty-three rainstorm flood events occurring from ...


    By IWA Publishing

  • Compensation Flow Gauge

    Hydro-Logic have been engaged by Dwr Cymru/Welsh Water since 2000 to operate, maintain and improve their hydrometric network. One of the projects involved the feasibility, design and installation of a new ultrasonic transit-time flow gauge on the discharge compensation flow channel from Cwmystradllyn Reservoir in North Wales. The new gauging station was required to replace a flume which was not ...

  • Sonic nozzles for gas calibrators, when simplicity provides accuracy!

    Gas analyser’s calibration is a task required in many applications according to either legislation or quality systems management. This is the case for Air Pollution Monitoring or Continuous Emissions Monitoring devices installed in cabinets, for continuous analysis in remote locations. Measurements in traces range are performed and analytical devices specifications need to be validated and ...


    By LNI Swissgas

  • Case study - Sievers 900/5310 C series TOC analyzers — calibration

    Synopsis The Sievers* 900 and 5310 C Series TOC Analyzers incorporate a number of new features and options designed toimprove the accuracy and linearity of the TOC measurements. Three new calibration options are available in the Analyzers: automatic conductivity offset, automatic TOC autozero, and single- or multipoint calibration of the TC and IC channels Conductivity ...


    By GE Analytical Instruments

  • A Profiling System in Amazonia with Automatic Calibration based on the CIRAS-SC Analyzer

    Amazonia constitutes a large global store of carbon. Forest conversion in Amazonia is a net source of carbon to the atmosphere, while recent measurements indicate that undisturbed forest systems may be a net carbon sink. The importance of sequestration of carbon in regrowing forest and abandoned lands is unclear. These issues represent uncertainties in the global carbon balance and may influence ...


    By PP Systems

  • Calibration and use of the polar organic chemical integrative sampler—a critical review

    The implementation of strict environmental quality standards for polar organic priority pollutants poses a challenge for monitoring programs. The polar organic chemical integrative sampler (POCIS) may help to address the challenge of measuring low and fluctuating trace concentrations of such organic contaminants, offering significant advantages over traditional sampling. In the present review, ...


    By John Wiley & Sons, Ltd.

  • FATE 5: A Natural Attenuation Calibration Tool for Groundwater Fate and Transport Modeling

    A new groundwater attenuation modeling tool (FATE 5) has been developed to assist users with determining site-specific natural attenuation rates for organic constituents dissolved in groundwater. FATE 5 is based on and represents an enhancement to the Domenico analytical groundwater transport model (Domenico, 1987). These enhancements include use of an optimization routine to match results from ...


  • Does traditional calibration hide errors in your demand analysis?

    Untitled Document A well-calibrated water distribution model can address numerous ...


    By Innovyze

  • Calibration of The LISFLOOD Model For Europe: Current Status And Way Forward

    The hydrological model LISFLOOD model forms the core of the European Flood Alert System (EFAS) and is used for impact studies to evaluate the effect of changes in land use and climate on the hydrological behaviour in catchments across Europe. The accuracy of the model predictions depends on the ability of the model to capture the dominating hydrological processes that transfer precipitation into ...


  • Water distribution network calibration using enhanced GGA and topological analysis

    The calibration of hydraulic models of water distribution networks (WDN) is of preeminent importance for their analysis and management. It is usually achieved by solving a constrained optimization problem based on some priors on decision variables and the demand-driven simulation of the entire network, given the observations of some hydraulic status variables (i.e. typically nodal heads and ...


    By IWA Publishing

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