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  • Understanding the Importance of Transducer Orientation
    When monitoring vibration on large gas or steam turbines and generators with fluid-film bearings, the relative movement of the shaft within the bearing is typically measured by a pair of shaft proximity (eddy current) transducers. Data from these transducers is used to produce a variety of plots
  • Coping with Transducer-Crippling Pressure Spikes
    Many transducers in fluid power systems fall victim to short-duration pressure overloads - commonly called pressure spikes. If these spikes are severe enough, a permanent, positive zero shift in the transducer's output can occur. After investigating these spikes, we developed a laboratory method
  • Visualizing the Dynamics of Fluid-Bed Dryers
    Operating fluid bed dryers today still involves more art than it does science. Basically, an operator looks through a sight glass and manually controls the process, says Todd Pugsley, professor of chemical engineering at the University of Saskatchewan (Saskatoon). Scale-up is even more
  • Preventing Pipeline Problems: Inspecting for Corrosion using a Dual Conventional Transducer
    Pipelines transport energy (crude oil, refined petroleum, natural gas, and biofuels to name a few) and other fluids within facilities and to various markets across vast distances. Today, there are millions of miles of pipeline all over the world, and many of these systems are old. The integrity
  • Thermostatic Valves vs. Solenoid Valves
    Thermostatic valves modulate open or closed in proportion to fluid temperature without the need for an external temperature transducer and external power, whereas solenoid valves require a temperature sensor, amplifier, control electronics, and DC Power to operate.
  • Speed of Response Curves (.pdf)
    to provide a basis of comparison. In temperature transducers, the time constant is defined as the time required, in seconds, for the temperature sensor to respond through 63.2% of the total temperature change. The factors affecting the response rate of a temperature probe in a fluid are: a) The mass
  • Frequency Sweep PDMS
    . transducers such as force rebalance transducers have difficulties making measurements above 16 Hz. due to limited system bandwidth. The results shown below were obtained in a single sweep in. frequency from 10-4 to 100 Hz, five times higher than comparable active compensation (FRT). transducers
  • Universal Viscosity Curve Theory
    Like any transducer, a turbine flow meter is sensitive to physical parameters other than the one which is of interest. While designed to measure flow, a turbine meter responds to the viscosity of a fluid as well as its velocity. Following is a brief discussion of the viscosity sensitivity

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