4..20 mA pressure sensors

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:

• Market standards. Ease of finding compatible equipment
• Simplified wiring. You only need two wires
• Extreme resilience to electromagnetic disturbances
• Ability to make relatively long connections

Disadvantages of current sensors:

• Expensive sensor power signal
• Energy-intensive