Calibration
4–20 mA Output for Process Transmitters: Meaning, Working Principle and Practical Use
A 4–20 mA output is a standard industrial signal used by process transmitters to send pressure, temperature, level, flow and other measurements to PLCs, DCS systems and indicators. This article explains 4 mA live zero, 20 mA full scale, signal scaling, formula, loop wiring, applications, advantages, troubleshooting and calibration in simple terms.
Shakti Sindhu
08 Jun 2026
