Solids tend to expand when heated. The amount that a solid sample will expand with increased temperature…
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There are many process control applications in the industry where it is desirable to have multiple control…
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There are several different methods useful for causing an AC induction motor to brake, or slow down: DC…
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Imagine a major marathon race, where hundreds of runners gather in one place to compete. When the starting gun…
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In order to provide an interface between the internal (digital) world of a computer and the external (analog)…
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A proximity switch is one detecting the proximity (closeness) of some object. By definition, these switches…
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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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Electrical power grids primarily consist of three-phase AC circuits. This means most power lines (transmission…
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The majority of flowmeter technologies operate on the principle of interpreting fluid flow based on the…
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The following collection of photographs chronicles the complete disassembly of a Fisher E-body globe valve…
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Any conductor possesses a characteristic called inductance: the ability to store energy in the form of a…
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Perhaps the most basic and necessary protective relay function is overcurrent: commanding a circuit breaker to…
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An extremely important topic in engineering is that of transfer functions. Simply defined, a transfer function…
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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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DC electric current signals may also be used to communicate process measurement information from transmitters…
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A hand switch is exactly what the name implies: an electrical switch actuated by a person’s hand motion.…
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“As to methods there may be a million and then some, but principles are few. The man who grasps…
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To understand just how different FOUNDATION Fieldbus is from other digital instrument systems, consider a…
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The key to understanding how three-phase electric motors work is to have an accurate mental picture of the…
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Sample sizes of chemical substances are often measured in moles. One mole of a substance is defined as a…
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Given the ability of pressurized fluids to transmit force over long distances, it is not surprising that many…
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