What is an analog Current loop? Check out the full blog post over at https://realpars.com/hart-protocol/ Current-loop technology has been used for analog sensors for the past 4 decades to transmit important process data to the control system, whether that system is a DCS, a PLC, or a single-loop controller. Current-loop data transmission is simple and cost effective. Only a small amount of current (4 to 20 milliamps to be exact) is required over a single pair of wires for each current loop senso