The current signal is a market standard in industrial devices that is well suited to heavy applications, in environments strongly disturbed by electromagnetic phenomena or with long connection distances between the pressure transmitter and the control device.
The current signal is typically in the standard 4..20 mA with two-wire transmission. The 4..20 mA signal is, in fact, a signal on a low impedance circuit that is difficult to disturb by the electromagnetic fields, usually existing in industrial environments, such as disturbances generated by power electronics (inverters).
The 4..20 mA signal is also virtually independent of the impedance wiring, a feature that allows the use of pressure transducers over long distances such as, for example, inside very large equipment.
Advantages of current sensors:
Disadvantages of current sensors: