4-20mA Current Loop. The 4 to 20mA current loop is a very robust sensor signalling standard. ... Current Source Design. The below figure illustrates a basic, one-transistor current source circuit. In ...

The old-fashioned way to build a 4-20mA transmitter included a field-mounted device that sensed a physical parameter and generated a proportional current in the standard range 4-20mA.

The 4–20mA current loop has been widely used as an analog communication interface in industrial applications. It facilitates transmission of data from remote sensors over a twisted-pair cable to a ...

The firm has a more detailed description of the precision current interface on line in a paper titled “High-Performance, High-Accuracy 4-20mA Current-Loop Transmitter Meets Toughest Industrial ...

To reduce noise and voltage drops in analog voltage signals, the market place has adopted an analog current (4-20mA) output as its sensor signaling standard. A very robust signal ...