4-20 mA current loopsare commonly used in the process control industry to transmit analog data. By convention, 4 mA corresponds to the minimum expected reading, and 20 mA corresponds to the maximum expected reading. A 4‑20 mA current signal can be transmitted over long distances, limited only by wire resistance, and is immune to voltage noise.
Digital panel meters, electronic counters, industrial timers and other 1/8 DIN size instruments are typically installed in the door of a sealed metal enclosure. While the enclosure protects its contents, the front panel of the instrument has to face the outside environment, which can be laden with dust, fumes and moisture. In many cases, plant equipment is water cleaned with high-pressure hoses — not so good if the water reaches delicate electronics.
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Laurel Electronics, LLC Industrial Instrumentation & Displays |
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3183-G Airway Avenue Costa Mesa, CA 92626, USA |
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Tel : (714) 434-6131 Fax : (714) 434-3766 |
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