How to Size a Current Transformer

Sizing a Current TransformerThe Current Transformer (CT) is used to sense AC current in single-phase or three-phase circuits. In the basic instrument-grade current transformer, a single primary conductor passes through the core. The secondary winding has multiple turns to provide a lower output current, as shown in the diagram. This allows the meter to be located away from the high current circuit. (more…)

Differences Between LCD and LED Displays

Digital panel meters (or DPM) typically uses either an LCD (Liquid Crystal Display) or LED (Light-Emitting Diodes) to display information in an alphanumerical format. What are the differences between LCD’s and LED’s and how do you know which one to pick for your application? Read on to find out! (more…)

The Taut-Band Analog Meter

Taut-Band Suspension System vs Pivot and Jewel Mechanisms

The frictionless, shock-proof, taut-band suspension system has demonstrated superiority over the pivot-and-jewel mechanism in all types of analog panel meters. (more…)

Combining the Best of Analog & Digital Instrumentation

Analog Panel Meter

Indication Measurements of process parameters have historically been accomplished by the analog panel meter (APM). Since 1819, when Oersted proved the existence of current in a wire by using a compass needle positioned next to a conductor, APMs have been the main indicator for all kinds of monitoring. (more…)