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  • Sensing and Controlling Humidity
    In the energy control business it is usually necessary to monitor humidity, as well as temperature. Sensing humidity cannot be done as easily or as accurately as temperature sensing. For example, a temperature sensor in outside air will provide dependable service for the life of the mechanical
  • Advances in Thermal Dispersion Mass Flow Meters - Part 1: Principle of Operation
    sensor. This unique new mass flow meter automatically manages changes in gas selection, gas temperature, gas pressure, and outside temperature. This Part 1 describes the principle of operation of the four-temperature system. Part 2 of this two-part series describes advances in the installation
  • Advances in Thermal Dispersion Mass Flow Meters - Part 2: Installation and Flow Calibration
    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
  • New Developments in Thermal Dispersion Mass Flow Meters
    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
  • Vacuum Motors
    or position samples, products, mirrors and sensors in a vacuum area (some of the most common requirements) has been accomplished with drive mechanisms and motors located outside the vacuum chamber. In this type of control solution, the drive mechanism transmits its motion through the vacuum chamber
  • New Developments in Thermal Dispersion Mass Flow Meters: In-the-Field Compensation for Changes in Natural Gas Composition
    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 flow sensor feeds its measurements into the algorithms
  • Calibrating Liquid Flow Instruments Beyond +5 °C to +90 °C
    at different temperatures and ensure the confidence of the Coriolis meter density measurement for fluid temperatures outside of the +5 °C to +90 °C range typically used for flow rate sensor calibrations. In addition, we will address other factors that influence Volumetric Flow.
  • Application: Coolant System Liquid Levels on Refrigerated Trucks (.pdf)
    Refrigerated trucks abound all over our roadways worldwide, many carrying 10s of thousands of dollars, Euros, etc. in fragile goods that must be kept cool, no matter what the outside temperature. Complicated coolant systems are used to keep the products cool. These systems can take a lot of abuse
  • Understanding Capillary Tube Thermal Mass Flow Meters & Controllers:
    the sensor tube. The ratio of the flows through the bypass and the sensor tube is a constant. The capillary sensor tube measures its internal mass flow rate by means of the heat capacity of the gas that carries heat from an upstream resistance-temperature-detector winding to a downstream winding, both

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