air velocity meter Articles

  • Air Flow Meters to Measure Air Velocity and Air Pressure

    Air flow meters are used to measure air velocity and air pressure. Depending on the type of application, air flow meters are made as hot-wire air flow meters or pocket weather flow meters, both of which can measure air velocity and air pressure. The results of measuring the air velocity can be stored in the memory of the device depending on the model. There are even data loggers for air velocity ...


    By PCE 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.

  • 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.

  • Air usage data increases company profit - Case Study

    A large American container company required mass flow meters on their air compressor lines to help evaluate the efficiency of blow mold machines in their plant. The manufacturer melts PET chips and extrudes them through blow mold machines to produce plastic bottles for the beverage industry. Plant engineers need data on compressed air usage to help them reduce utility and production costs. Four ...


    By Sierra Instruments, Inc.

  • GKN aerospace success with portable impedance meter

    The GKN site in Cowes, Isle of Wight, UK, has long experience in the design and manufacture of passive sound insulation systems for air-intakes and by-pass ducts of aircraft engine nacelles. Dr. Armando Vavalle, Technology Development Engineer from GKN reports here on impedance tests conducted with Brüel &Kjær’s Portable Impedance Meter Type 9737 for the development of such ...

  • Performance monitoring & troubleshooting with a new individual condenser tube circulating water flow and fouling (ClA/FF) meter - case study

    Introduction Midwest Generation Joliet Station in Illinois has two coal-fired units, Unit 7 and Unit 8. Roth 550 MW units are located on the Des Plaines River and have been in operation since 1963-1964. The circulating water system is a once-through system comprised of a bar rack, traveling screens, circulating water pumps and reversible condensers. The original condenser tubes on Unit ...


    By Intek, Inc.

  • Canarina DISPER software · Safety engineering · commands 22

    The necessary data is: Physical stack height (m): This is the physical stack height in meters. Stack gas exit velocity vs (m/s): This is the stack gas exit velocity. It can be around 15 m/s. Stack ...

  • 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.

  • Advanced thermal dispersion mass flowmeters

    Thermal dispersion (TD) mass flowmeters measure the mass flowrate of fluids (primarily gases) flowing through a closed conduit, such as a pipe. This article describes the operation and installation of TD mass flowmeters, and gives the reader information about what applications these meters are most suited for. Background The first general description of TD mass flowmeters is ...


    By Sierra Instruments, Inc.

  • Facility reduces process downtime – Case Study

    A facilities subcontractor for Boeing required meters to monitor the make-up air mass flow rate into a painting facility. The make-up fans ensure compliance with OSHA and Boeing air quality standards by reducing contamination and airborne particles that result from over-spray. The Boeing standard dictates a minimum airflow of 125 SFPM to the paint booths. Should the airflow drop below this ...


    By Sierra Instruments, Inc.

  • 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 ...


    By Sierra Instruments, Inc.

  • The quest for the perfect flowmeter

    Gases & Instrumentation had the oppor-tunity to speak with Dr. John G. Olin, Founder and Chairman of the Board of Sierra Instruments about the evolution of thermal mass flow meters and his latest product in this technology. Gases & Instrumentation: You have been engaged in thermal mass flow technology for a number of years. You must have seen a lot of change. ...


    By Sierra Instruments, Inc.

  • Gentle unloading of sodium perborate from bulk vehicles by pneumatic plug conveying

    Subject: Unloading bulk vehicles; conveyor system; conveying distance 9 meters horizontal, 12 meters vertical   Client: Labud d.o.o., Zagreb, Croatia   Gericke Technology: Gentle unloading of bulk tankers; PTA-PL system (Pulseline®). Mobile docking station with integral controlunit, additional equipment for controlled and pulsed secondary air, injections along the pipe ...


    By Gericke

  • Aerosol filtration in nanofiber filter media

    Nanofiber filter media are used in air filter applications where a compact filtration system with very high overall and fractional efficiency and low initial pressure drop  is required.  Moreover, because the aerodynamic drag force on nanofibers is very low compared to the drag on the large dust particles collected on the nanofiber media, this media is ideal for application to ...

  • Deal With The Pressure - Protect piping system components with Pulsation Dampeners

    Metering pumps with operating pressures of up to 150 psig (pounds per square inch gauge) can create unwanted pressure pulsations within a piping system – a real problem in applications such as filling, mixing and spraying that require a combination of a metering pump’s accuracy and a continuous flow. But the issue can often be addressed with Pulsation Dampeners.The Pulsation Dampeners, usually ...


    By Lutz-JESCO America Corp.

  • New Boliden Rönnskär Zinc Furnace - Case Study

    Rönnskär plant NEW BOLIDEN is the third largest copper metals supplier in Europe and handles all process stages from mining via smelting until recycling for copper, zinc and other valuable metals. The Rönnskär plant located in Skelleftehamn in northern Sweden houses one of the largest copper smelters of its kind in the world. Beside copper zinc, clinker, lead and precious ...

  • Efficient aeration system boosts energy savings

    A new efficient aeration system saves the Ontario, Ore., wastewater treatment facility $47,000 annually in energy costs. Besides giving this community a financial boost, the new system netted additional equipment cost savings by cutting aeration horsepower by more than half at the plant. The environmentally conscious city, located in the Oregon/Idaho border area, is meeting all of its effluent ...

  • Choosing flow monitors for CEMS applications

    As a result of the 1990 Clean Air Act Amendments1, electric power plants must reduce their emissions of sulfur dioxide and nitrous oxides—the primary causes of acid rain. The U.S. Environmental Protection Agency (EPA), in its proposed rules2, designates the 111 Phase I fossil-fueled plants ^roughly 268 boiler units) that must have continuous emissions monitoring systems (CEMS) installed, ...


    By Sierra Instruments, Inc.

  • It’s a sensor game

    From Sierra’s beginning over 40 years ago, founder Dr. John G. Olin was driven by the vision of supplying industrial customers with the world’s most accurate mass flow meter. And, he knew it was a ‘sensor’ game. With a background – and Ph.D. – in mechanical engineering and specialised in fluid mechanics and heat transfer, Olin was a driven innovator and ...


    By Sierra Instruments, Inc.

  • Sahara in-line inspections: when speed, accuracy and on-the-spot results matter

    For more than 15 years, water operators have relied on the Sahara® leak detection platform for speed, accuracy and on-the-spot results required for inspection of complex pipeline networks typically found in urban environments. The Sahara in-line tethered ...

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