Posted on 8/24/2023
In some specific places there are often gas emissions, such as petrochemical, coal, metallurgy, chemical, municipal gas, environmental monitoring and many other places.
・Two-Wire 4-20mA
Two-wire system, as the name suggests, the signal transmission and power supply of the instrument together with two wires to complete, these two wires are both the power line and the signal transmission line.
Advantage: only two wires, compared with three-wire and four-wire system, in the wiring distance is very long, can reduce more than 1/3 of...