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Proximity Switches

Textbook

A proximity switch is one detecting the proximity (closeness) of some…

Basic Feedback Control Principles

Textbook

Before we begin our discussion on process control, we must define a…

Electronic Structure

Textbook

Earlier in this chapter you were shown a model of a nitrogen atom with…

Mechanical Pressure Elements

Textbook

Mechanical pressure-sensing elements include the bellows, the…

EIA/TIA-232, 422, and 485 Networks

Textbook

Some of the simplest types of digital communication networks found in…

Auxiliary and Lockout (86) Relays

Textbook

An important type of “accessory” relay, especially for…

Scientific System diagnosis and Scientific Reasoning

Textbook

At the root of successful system diagnosis is a rigorous adherence to…

Limit, Selector, and Override Controls

Textbook

Another category of control strategies involves the use of signal…

Valve Positioners

Textbook

The reason why a pneumatic control valve’s stem position…

Basic Components Common to all Radio Systems

Textbook

“Radio” systems use electromagnetic fields to communicate…

Basics of Electrical Current

Textbook

Current is the name we give to the motion of electric charges from a…

Chromatography: Methods, Detectors and Species

Textbook

Imagine a major marathon race, where hundreds of runners gather in one…

Colorimetric and Potentiometric pH Measurement

Textbook

pH is the measurement of the hydrogen ion activity in a liquid…

Gas Filter Correlation (GFC) Spectroscopy

Textbook

Using filter cells to eliminate wavelengths associated with…

Level Gauges (Sightglasses)

Textbook

Level gauges are perhaps the simplest indicating instrument for liquid…

Measuring Electrical Conductivity

Textbook

The electrical conductivity of liquids is an important analytical…

Teaching Diagnostic Principles and Practices

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Diagnostic ability is arguably the most difficult skill to develop…

Common Control Valve Problems

Textbook

Control valves are subject to a number of common problems. This…

Periodic Table of the Ions

Textbook

FOUNDATION Fieldbus H1 Protocol Data Link Layer

Textbook

Like so many other industrial data networks, FOUNDATION Fieldbus is an…

Radiation Level Measurement

Textbook

Certain types of nuclear radiation easily penetrates the walls of…

Different PID Equations

Textbook

For better or worse, there are no fewer than three different forms of…

Principles, not Procedures

Textbook

One of the marks of a successful problem-solver is a habit of applying…

What is Internet Protocol (IP)?

Textbook

I remember first learning about the world-wide Internet, and wondering…

Thermocouple Types, Junctions, Connector and Tip Styles

Textbook

RTDs are completely passive sensing elements, requiring the…

Error Corrections

Textbook

Abdelaziz, Ahmed (June 2014) Identified numerous typographical errors…

Single-line Electrical Diagrams

Textbook

Electrical power grids primarily consist of three-phase AC circuits.…

Weighfeeders

Textbook

A special type flowmeter suited for powdered or granular solids is the…

Chromatography: Methods, Detectors and Species

Textbook

Imagine a major marathon race, where hundreds of runners gather in one…

Pressure Switches

Textbook

A pressure switch is one detecting the presence of fluid pressure.…

Null-balance Voltage Measurement

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A number of different sensors used in instrumentation generate DC…

Common Educational Fallacies

Textbook

When I began teaching full-time in 1998, most of what I thought I…

Logic programming in PLCs

Textbook

Although it seems each model of PLC has its own idiosyncratic standard…

Ladder Diagram (LD) Programming

Textbook

In the United States, the most common language used to program PLCs is…

Valve Positioners

Textbook

The reason why a pneumatic control valve’s stem position…

Electronic Structure

Textbook

Earlier in this chapter you were shown a model of a nitrogen atom with…

Policy-based Fortifications

Textbook

These fortifications focus on human behavior rather than system design…

LRV and URV Settings, Digital Trim (Digital Transmitters)

Textbook

The advent of “smart” field instruments containing…

Instrument and Process Equipment Symbols

Textbook

This section shows some of the many instrument symbols found in…

Kirchhoff’s Current and Voltage Laws

Textbook

Two extremely important principles in electric circuits were codified…