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4-20mA vs RS485 Modbus: Which Output Signal Is Better for Industrial Sensors?
When selecting industrial sensors, many engineers focus on measurement range, accuracy, and installation requirements. However, one critical factor is often overlooked: the output signal. Today, the two most common output options for industrial instruments are 4-20mA analog output and RS485 Modbus digital communication. Whether you're selecting a pressure transmitter, level sensor, flow meter, or water quality analyzer, understanding the differences between these communication methods can help improve system reliability, simplify integration, and reduce installation costs. In this guide, we'll compare 4-20mA and RS485 Modbus communication and explain which option is best for different industrial applications. What Is a 4-20mA Output Signal?...
