A damper (otherwise known as a louvre) is a multi-element flow control device generally used to throttle large…
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Multiple accessories exist for pressure-sensing devices to function optimally in challenging process…
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Many traditional flowmeter technologies respond to the volumetric flow rate of the moving fluid.…
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A much simpler alternative to continuous vibration sensors (displacement or acceleration) and monitoring…
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Valve actuators provide force to move control valve trim. For precise positioning of a control valve, there…
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The Law of Mass Conservation states that matter can neither be created nor destroyed. The Law of Energy…
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In addition to directly performing logic functions, electromechanical relays may also be used as interposing…
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DC electric current signals may also be used to communicate process measurement information from transmitters…
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Level gauges are perhaps the simplest indicating instrument for liquid level in a vessel. They are often found…
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Three-phase AC is the dominant mode of electric power generation and distribution in modern societies.…
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At the next OSI Reference Model layer (layer 4) is a set of protocols specifying how reliable communication…
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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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Learning how to tune PID controllers is a skill born of much practice. Regardless of how thoroughly you may…
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A powerful mathematical concept useful for analyzing practically any physical system – electrical…
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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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There are many process control applications in the industry where it is desirable to have multiple control…
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One of the most important accessories for any temperature-sensing element is a pressure-tight sheath known as…
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To show a practical process example, let’s examine three diagrams for a compressor control system,…
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The simplest form of 4-20 mA current loop is the type used to represent the output of a process controller,…
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Suppose we wished to measure the consumption of propane over time for a large propane storage tank supplying a…
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