Once while working as an instrument technician in an aluminum foundry, a mechanic asked me what it was that I…
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“Feedforward” is a rather under-used control strategy capable of managing a great many types of…
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Nearly every technical course teaches and tests students on definitions, basic concepts, and at least some…
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At the root of successful system diagnosis is a rigorous adherence to scientific reasoning. There exists no…
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The majority of flowmeter technologies operate on the principle of interpreting fluid flow based on the…
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A damper (otherwise known as a louvre) is a multi-element flow control device generally used to throttle large…
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A great many precision instruments use the principle of balance to measure some quantity. Perhaps the simplest…
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A special type flowmeter suited for powdered or granular solids is the weighfeeder. One of the most common…
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The following animation shows a rotating phasor in three-dimensional form. The phasor rotates in a complex…
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A proximity switch is one detecting the proximity (closeness) of some object. By definition, these switches…
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The most popular form of signal transmission used in modern industrial instrumentation systems (as of this…
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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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Process measurements are often of an analog nature: the temperature of a furnace, the rate of fluid flow…
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A simple control system drawn in block diagram form looks like this: Information from the measuring device…
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Regardless of valve type, all stem-actuated control valves require some form of seal allowing motion of the…
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To summarize some of the key points and concepts for teaching: Do not waste class time transmitting facts to…
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Shown here is a partial listing of principles applied in the subject matter of this chapter, given for the…
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Valves can experience a number of problems, most of them either preventable or repairable. These problems can…
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Electrical Resistance Resistance (\(R\)) is the dissipative opposition to an electric current, analogous to…
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When I began teaching full-time in 1998, most of what I thought I understood about good teaching was actually…
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