air flow calibrator Articles

  • 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.

  • 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 ...

  • Advances in Thermal Dispersion Mass Flow Meters - Part 2 Installation and Flow Calibration

    Abstract Part 1 of this two-part series describes the principle of operation of a new microprocessor-based thermal dispersion mass flow meter that uses four temperature sensing elements in its flow sensor and has a dry velocity sensor. Part 1 shows how this unique system provides automatic management of changes in gas selection, gas temperature, gas pressure, and outside temperature. This ...


    By Sierra Instruments, Inc.

  • Optimizing air flows to aeration basins – Case Study

    As a result of clean energy mandates and the rising cost of energy, wastewater treatment facilities around the country are retrofitting their instrumentation to run highly efficient, cost-effective, clean facilities. To reduce emissions and produce clean energy, solid wastes are often digested in large digester tanks to reduce the volume of waste (sludge) and produce more biogas, which is then ...


    By Sierra Instruments, Inc.

  • [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, ...


    By Sierra Instruments, Inc.

  • 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, ...


    By Sierra Instruments, Inc.

  • Particulate partial flow sampling

    The sampling method of the Sierra Instruments Model BG-3 sets the standard for engine particulate emissions measurement protocols of the future sierra instruments In a study at West Virginia University, evidence showed that the Sierra Model BG-3 partial-flow system is equivalent to full-flow CVS. At the August 2008 DEER conference, the university’s Dr Ben Shade presented a paper evaluating ...


    By Sierra Instruments, Inc.

  • 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

  • VIDEO: Mass Flow Meters for Power Plant Applications

    Generating electricity in a natural gas power plant is a complex process due to the multiple steps involved with the different types of fluids being used and optimized. Dr. John Olin, Founder of Sierra Instruments, explains how thermal mass flow meters, vortex flow meters, and ultrasonic flow meters can improve the flow energy management in power plant ...


    By Sierra Instruments, Inc.

  • Retrofitting of a cement mill for mass flow measurement with MaxxFlow HTC - Case Study

    Application The cement mill plays a central role in the process of cement production. In the cement mill cement is ground, to obtain a predefi ned grain size. Via the mill reject fl ow excess material with a to great grain size is separated and returned to the grinding process via a return pipe. To keep the mill in the optimum level of effi ciency, a continuous fl ow measurement for the ...


    By ENVEA

  • Smart–Trak 2 mass flow controllers put users in control

    Next Generation of High-Performance Digital Gas Mass Flow Meters Sierra Instruments is introducing its next generation of high-performance digital gas mass flow meters and controllers—the Smart-Trak 2 Model 100. The proprietary ST2 technology in every Model 100 is based on five-year’s worth of user feedback and suggestions, says Mark McMahon, product manager for Sierra ...


    By Sierra Instruments, Inc.

  • Mass flow measurement in a lime plant with MaxxFlow HTC - Case Study

    Application A producer of lime manufactures a wide range of products in his cement and lime plant. Among others he produces coarse limestone grains, lime sand, very fi nely ground unburnt limes or highly reactive lime hydrates. Our customer needed the possibility to measure quantity of the different lime products during the fabrication processes, to get a more detailed overview of the ...


    By ENVEA

  • 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

  • Advances in Thermal Dispersion Mass Flow Meters - Part 1 Principle of Operation

    Abstract This paper describes an advanced microprocessor-based thermal dispersion mass flow meter that uses four temperature sensing elements in its flow sensor instead of the traditional two elements and has a dry velocity sensor that uses no potting materials instead of the traditional potted velocity sensor. This unique new mass flow meter automatically manages changes in gas selection, ...


    By Sierra Instruments, Inc.

  • The challenges and benefits of local air quality monitoring

    A new generation of air quality monitors is now being offered to provide localised, real-time air quality readings – but the potential benefit is only just starting to be realised. It is generally accepted that whilst measurements from air quality reference stations are highly accurate, they are not sufficiently location-specific. Key pollutants – such as NO2 and PM2.5 ...


    By AQMesh

  • 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 ...


    By Sierra Instruments, Inc.

  • Now Measure All Flow Energy in Your Facility - One Solution - Three Metering Technologies

    Facilities managers at large facilities often have the challenging task of managing all the flow energy in their facility with the mandate from upper management to save money on energy costs. To accomplish this goal, it’s critical to get accurate flow measurement data of the flow energy in your facility such as: natural gas, compressed air, steam, chilled and hot water. ...


    By Sierra Instruments, Inc.

  • 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 ...


    By Inderscience Publishers

  • Air pollution – the invisible roadside killer

    The VW emissions scandal has helped to raise awareness of the deadly threat posed by air pollution in many of our towns and cities. In the following article, Jim Mills, Managing Director of Air Monitors, an instrumentation company, explains why diesel emissions will have to be lowered and how the latest monitoring technology will be an essential part of the solution. ...


    By Air Monitors Ltd.

  • Delivering automation to test stations - Case Study

    CeraMem Corporation is a developer of metal oxide gas concentration sensors in Waltham, MA. Their test engineers required mass flow controllers that were easy to intregrate and calibrate. They also demanded fast response and high accuracy in order to reduce test cycle length and improve the quality of the data. Test station requirements demanded that controllers were capable of adjusting ratios ...


    By Sierra Instruments, Inc.

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