3-Wire

• Meaning: A 3-wire pressure transmitter uses three electrical connections: one for a power supply positive, one for an output signal positive, and a shared common/negative connection for both. This configuration allows for better signal quality and accuracy compared to 2-wire transmitters, especially when dealing with longer cable lengths or higher output currents.
• Specificity: The 3-wire configuration offers advantages in terms of signal integrity and potential for higher output currents, making it suitable for applications requiring precise pressure measurements.
• Applications:
  • Industrial process control: Used in demanding applications where accurate and stable pressure measurements are critical, such as in oil and gas, chemical, and power generation industries.
  • Long-distance transmission: Suitable for remote installations with extended cable lengths due to its improved noise immunity.
  • High current outputs: Can be used in applications requiring higher output currents, such as driving actuators or valves directly.

Note: While 3-wire transmitters offer advantages over 2-wire, they require additional wiring compared to 2-wire systems.