A very common method for directly controlling low flow rates of fluids is to use a device known as a metering…
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Some self-powered (4-wire) analog electronic transmitters are designed to behave as electrical loads rather…
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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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Once while working as an instrument technician in an aluminum foundry, a mechanic asked me what it was that I…
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As we have seen, feedforward control is a way to improve the stability of a feedback control system in the…
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Like so many other industrial data networks, FOUNDATION Fieldbus is an “unswitched” or…
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“Feedforward” is a rather under-used control strategy capable of managing a great many types of…
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There is much to be said for neatness of assembly in electrical signal wiring. Even though the electrons…
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There are multiple motives for compromising the security of an industrial control system, some of which…
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Perhaps the simplest form of solid or liquid level measurement is with a float: a device that rides on the…
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The digital multimeter (DMM) is quite possibly the most useful tool in the instrument technician’s…
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A control strategy similar to ratio control is relation control. This is similar to ratio control in that a…
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“Polyphase” means “many phases,” describing a form of AC electrical system where…
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DC electric motors generate torque by a reaction between two magnetic fields: one field established by…
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A proximity switch is one detecting the proximity (closeness) of some object. By definition, these switches…
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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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A damper (otherwise known as a louvre) is a multi-element flow control device generally used to throttle large…
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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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Electrical power grids primarily consist of three-phase AC circuits. This means most power lines (transmission…
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Some of the simplest types of digital communication networks found in industry are defined by the EIA…
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