What is 2-wire 4-20ma transducer?

A 2-wire 4-20 mA transducer is a type of sensor that converts a physical measurement, such as temperature or pressure, into a standardized electrical signal that ranges from 4 to 20 milliamperes (mA). It operates using only two wires: one for the power supply and the other for the output signal. The 4 mA level represents the lowest end of the measurement range, while 20 mA indicates the highest, providing a linear output that simplifies signal interpretation and minimizes the effects of resistance in the wiring. This configuration is widely used in industrial applications for ease of installation and reliability in transmitting data over long distances.