Using filter cells to eliminate wavelengths associated with interfering gases is called positive filtering in…
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Measuring the flow rate of liquid through an open channel is not unlike measuring the flow rate of a liquid…
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“Polyphase” means “many phases,” describing a form of AC electrical system where…
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Many traditional flowmeter technologies respond to the volumetric flow rate of the moving fluid.…
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Every programmable logic controller must have some means of receiving and interpreting signals from real-world…
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Modern analog-to-digital converters are phenomenally accurate, dependable, repeatable, and surprisingly…
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The vast majority of modern process transmitters (both analog and digital) come equipped with a feature known…
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The following collection of photographs chronicles the complete disassembly of a Fisher E-body globe valve…
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Capacitors store energy in electric fields, proportional to the square of voltage. Inductors store energy in…
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PID control can be a confusing concept to understand. Here, a brief summary of each term within PID (P. I, and…
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A very simple device used to measure pressure is the manometer: a fluid-filled tube where an applied gas…
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Lipták, Béla G. et al., Instrument Engineers’ Handbook – Process Measurement and Analysis Volume I,…
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An variable-area flowmeter is one where the fluid must pass through a restriction whose area increases with…
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Light is known to interact with matter in very specific ways, which may be exploited as a means of measuring…
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Two extremely important principles in electric circuits were codified by Gustav Robert Kirchhoff in the year…
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Up until this point, we have explored various types of instrumentation diagram, each one making reference to…
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A unique form of differential pressure-based flow measurement deserves its own section in this flow…
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The vast majority of PID controllers in service today are digital in nature. Microprocessors executing PID…
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Phasors are to AC circuit quantities as polarity is to DC circuit quantities: a way to express the…
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The term “grid” refers to the conductors and equipment interconnecting power sources to power…
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