2-Wire

• Meaning: A 2-wire pressure transmitter uses a single pair of wires to both power the device and transmit the measured pressure signal. This is typically achieved using a 4-20 mA current loop, where the current value is proportional to the measured pressure.  
• Specificity: The 2-wire configuration simplifies installation and wiring compared to 3- or 4-wire transmitters. It is commonly used in industrial environments due to its robustness and immunity to electrical noise.  
• Applications:
  • Industrial process control: Widely used in various industries for monitoring and controlling pressure in processes like manufacturing, oil and gas, and water treatment.
  • Remote monitoring: Suitable for applications where space is limited or wiring complexity needs to be minimized.
  • Hazardous environments: Can be used in areas with potentially explosive atmospheres due to its intrinsic safety features.

Note: While 2-wire transmitters are popular, they may have limitations in terms of signal accuracy and power supply requirements compared to other configurations.