thermal resistivity measurement Articles

  • Ceramic membranes with higher abrasion resistance

    High flux rates, combined with a very high chemical and thermal resistance and the resulting operational reliability - these are the reasons why users worldwide opt for ceramic membranes. Up to now, the only parameter where ceramic membranes performed well but not excellent was abrasion resistance. Therefore, filtering of abrasive matter required pre-treatment stages such as prefiltration, ...


    By atech innovations gmbh

  • Brüel & Kjær’s radiation-resistant accelerometers

    Carrying out vibration measurements in harsh industrial environments is much easier for engineers with Brüel & Kjær’s new Type 8347-C Accelerometer. The Type 8347-C accelerometer can withstand temperatures ranging from -196°C (-321°F) to +482°C (+900°F) and has high resistance to radiation. The shear design ensures the accelerometer  superior thermal ...

  • Corrosion and contact resistance measurements of different bipolar plate material for Polymer Electrolyte Membrane Fuel Cells

    Different types of commercial stainless steels (SS316, SS310 and incoloy 800), poco graphite, composite graphite, titanium carbide, zirconium carbide and carbide base coating on aluminum substrate using thermal spray technique were evaluated as metallic bipolar plate in terms of Interfacial Contact Resistance (ICR) and corrosion resistance in a solution simulating the environment of a bipolar ...


    By Inderscience Publishers

  • Industrial thermal mass flow meters Pt.1 -Pt.2 - measurement & control

    An industrial thermal mass flowmeter measures either the mass velocity at a point in a flowing gas or the total mass flow rate through a channel or pipe. Figure 1 shows a typical thermal mass flow sensing element. It consists of two sensors: a mass flow sensor and a temperature sensor, which automatically corrects for changes in gas temperature. Both sensors are reference- grade platinum ...


    By Sierra Instruments, Inc.

  • The evolution of thermal mass flow meters

    Who were some of the pioneers in thermal mass flow technology? A. Thermo-Systems, Inc. (TSI) began in its founder’s basement in 1959, with a cooled-film anemometer designed for transient measurements in high temperature fluid flows. This led to TSI’s hot-film and hot-wire anemometers, the first commercial products of this type. These immersion-type devices were used mainly as ...


    By Sierra Instruments, Inc.

  • E-Guide Measuring Oil Viscosity

    The most important physical property of a lubricating oil is viscosity. Viscosity determines the load carrying ability of the oil as well as how easily it circulates. The correct balance between high viscosity for load carrying and low viscosity for ease of circulation must be considered for any lubricant and its application. ...


    By Spectro Scientific

  • Sensor design the key advantage in thermal mass flow meter performance

    Immersible thermal sensors arc finding growing acceptance in the gas flow measurement field. By using two Platinum Resistance Temperature Detectors (PRTDs) immersed in a stream of flowing gas, modern thermal flow meters can directly measure mass flow, without the need for temperature or pressure compensation. Thermal meters offer very high turndown, accu- racy and repeatability at an economical ...


    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.

  • In-Situ Calibration - Methods & Pitfalls of Thermal Mass Flow Meter Sensor Field Validation

    Introduction Mid-to-large size facilities and campuses inevitably have hundreds of ¬ ow instruments to monitor, maintain, and repair. For a reliability engineer, ensuring that all instrumentation meets ISO 9000 or similar standards is a time-consuming responsibility. These standards mandate that precision instrumentation needs to be checked (validated) or recalibrated as often as once a ...


    By Sierra Instruments, Inc.

  • The IMPROVE_A Temperature Protocol for Thermal/Optical Carbon Analysis: Maintaining Consistency with a Long-Term Database

    Thermally derived carbon fractions including organic carbon (OC) and elemental carbon (EC) have been reported for the U.S. Interagency Monitoring of PROtected Visual Environments (IMPROVE) network since 1987 and have been found useful in source apportionment studies and to evaluate quartz-fiber filter adsorption of organic vapors. The IMPROVE_A temperature protocol defines temperature plateaus ...

  • Comparing TGA, FTIR and fixed filter infrared analyzers for measuring soot levels in in-service lubricants

    Measuring soot in diesel engine oil has become more important as soot levels get higher due to exhaust gas recirculation. As soot isone of the key indicators for the condition of the oil, diesel engine maintenance programs performing regular soot checks can realize cost savings by extending drain periods and reducing used oil disposal. TGA (Thermal Gravimetric Analysis) is the traditional method ...


    By Spectro Scientific

  • Improved electrical characteristics of porous germanium photodiode obtained by phosphorus ion implantation

    Germanium–based photodetectors are the standard technology used for radiometric measurement in the IR spectral range. Shallow PN+ junctions were obtained by using ion implantation in p–type germanium. N–type doping was achieved by phosphorus implantation at a dose of 1 × 1015 cm−2 doses and an energy of 150 keV followed by annealing at ...


    By Inderscience Publishers

  • Good practice guide for miniature ETMT tests.

    Abstract: This Good Practice Guide discusses various aspects of testing miniaturised testpieces of representative engineering alloys in the NPL / Instron Electro-Thermal Mechanical Test system (ETMT). Different strain measurement techniques are reviewed including the use of electrical resistance, grip displacement and image correlation. Detailed comments are given in respective ...

  • Thermistors

    NTC thermistor temperature sensors Thermistor is a semiconductor resistor whose resistance various significantly with temperature. Depended on the character of these changes we distinguish: NTC thermistors (negative temperature coefficient) whose resistance drops when the temperature is rising. PTC ...


    By madur Polska Sp. z o.o.

  • In Situ electromagnetic heating for hydrocarbon recovery and environmental remediation

    Introduction Thermal recovery methods, as applied in heavy oil and oil sand deposits, and in environmental remediation, have the common objective of accelerating the hydrocarbon recovery process. Raising the temperature of the host formation reduces the oil and bitumen viscosity, and, in environmental remediation, increases vapour pressure. These effects assist in sweeping the substances ...


    By McMillan-McGee Corp.

  • Iron Ore Pelletizing Plants - Case Study

    Changing the iron ore processing chain The iron ore being mined globally can approximately be divided equally into boulders and fines. For further processing boulders have to be sized to 10-30 mm for blast furnaces and 6-18 mm for sponge iron plants. Iron ore in a finely ground state is not easily transported or readily processed .The iron ore pelletizing process agglomerates the fine ...

  • Hielscher Ultrasonics: Liquefaction of honey by ultrasonication

    Ultrasound offers an effective method, crystals in honey to liquefy and destroy the yeast, without affecting the quality of honey. Honey is valued worldwide for its delicious taste and its positive effects on human health. The natural product consists of honey, glucose, fructose, water, maltose, trisaccherides and other carbohydrates, sucrose, minerals, proteins, organic acids, vitamins, as well ...


    By Hielscher Ultrasonics GmbH

  • The benefits of a Force-Balanced Sensor

    Your project needs the precision to monitor movement as fine as 1 µG or µradian, but there will also be a lot surrounding noise and vibration that you don’t want to interfere with your readings. If you’re working on something like this, a sensor with force-balanced technology is the answer and here is why. ...


    By Jewell Instruments LLC

  • A Faster and Better FluidScan with Version 5

    Measure water contamination in turbine oils down to 300 ppm The latest version of FluidScan software can detect total water presence as low as 300 ppm in turbine oils.  The method provides an alternative to laboratory tests such as Karl Fischer titration when fast, simple, and reagent-free analysis is needed. In addition to measuring water contamination, the FluidScan ...


    By Spectro Scientific

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