Why 4-20 mA Current Signal is used instead of Voltage Signal

Troubleshooting a 4-20mA Current loop

The basic layout of every 4-20mA loop consists of a power supply, a transmitter, and passive loop devices. The supply produces the energy to run loop.

4-20mA Current Loop Components

Why Use a Current Loop?

4-20mA current-loop circuit have four individual elements: a sensor/transducer, a voltage-to-current converter, loop power supply and a receiver / monitor.