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Wayne Hayward is the director of marketing at Athena Controls. The Plymouth Meeting, Pa.-based company can be reached at 610-828-2490 or visit www.athenacontrols.com.
A primer on thermocouples — the most widely used temperature-measurement devices — also explores instruments to control temperature in industrial processes.
The versatile thermocouple is the most widely used industrial temperature-measurement device. Thermocouples are made by joining two pieces of dissimilar wire, and they can be sized by the gauge of wire used.
The materials of construction, temperature range, accuracy and control requirements for each type of temperature-measuring device varies, but the key function remains the same.
Temperature is a critical — and constantly measured — controllable process variable for engineers with applications ranging from water feed to a boiler to the temperature inside an induction furnace. In fact, temperature measurement in industrial processes covers a diverse universe of needs.