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How a 4-20 mA current loop works

How a 4-20 mA current loop works

How a current loop works

A typical 4-20 mA current loop circuit is composed of four individual elements: a sensor / transducer; a voltage to current converter (commonly referred to as a transmitter and / or signal conditioner); a loop power supply; and a receiver / monitor. In loop-fed applications, the four elements are connected in a closed circuit, series, loop configuration.

1.Sensor

First,…

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