4-20mA电流回路是工业仪控系统中的通用信号标准，通过电流回路转换器能将0-20mA转换为4-20mA… 4至20mA回路电流(loop current)是过程工业中仪控工程师熟悉的标准信号。现场的压力、温度以及流量变送器会依据量测的过程参数，输出对应的4至20mA电流信号，以实现 ...

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, 4-20mA current ...