The Siemens SITRANS P320 / P420 7MF03 / 7MF04 Pressure Transmitters are advanced digital pressure measurement devices designed for demanding industrial process applications. They provide reliable measurement of gauge pressure, absolute pressure, differential pressure, level, volume flow, and mass flow for liquids, gases, and vapors.

The SITRANS P320 and SITRANS P420 combine high accuracy, fast response, advanced diagnostics, and safety functions for industries such as chemical, petrochemical, power generation, and process automation. The transmitters support remote safety handling, enabling configuration and maintenance functions from the control room.

The 7MF03 series corresponds to SITRANS P320 gauge pressure transmitters, while the 7MF04 series covers SITRANS P420 configurations. The P420 provides enhanced accuracy and additional digital features such as onboard process value storage and trend recording.

Model Overview

Key Features

• Digital pressure transmitter for industrial process measurement
• Measures gauge, absolute, and differential pressure
• Suitable for liquids, gases, and vapors
• Accuracy up to 0.065% for SITRANS P320
• Accuracy up to 0.04% for SITRANS P420
• Fast response time and excellent long-term stability
• Remote Safety Handling for SIL applications
• Supports SIL 2/3 safety applications depending on configuration
• NAMUR NE107 diagnostic functions
• HART, PROFIBUS PA, and FOUNDATION Fieldbus communication options
• Robust design for harsh industrial environments
• Wide measuring range from low pressure to high pressure versions
  

Advantages

Siemens SITRANS P320

The SITRANS P320 is designed for reliable pressure measurement with advanced diagnostics and safety functions. It is suitable for standard process industries requiring high accuracy and stable operation.

Siemens SITRANS P420

The SITRANS P420 provides enhanced measurement performance with higher accuracy and additional digitalization features, including integrated trend recording of measured values for process optimization.

Applications

• Chemical processing plants
• Oil & gas industry
• Petrochemical facilities
• Power generation systems
• Steam pressure monitoring
• Reactor pressure measurement
• Tank level measurement
• Differential pressure flow measurement
• Process automation systems
• Safety instrumented systems (SIS)

Selection Notes

Before selecting the Siemens SITRANS P320 / P420 Pressure Transmitter, consider:

• Measurement type:
  • Gauge pressure
  • Absolute pressure
  • Differential pressure
  • Level measurement
  • Flow measurement
• Process medium:
  • Gas
  • Liquid
  • Steam
  • Corrosive media
• Required accuracy level:
  • Standard applications → SITRANS P320
  • Higher precision and digital functions → SITRANS P420
• Additional requirements:
  • SIL certification
  • Hazardous area approval
  • Remote seals
  • Communication protocol

FAQ

Q1: What is the difference between Siemens SITRANS P320 and P420?
The SITRANS P320 is a high-performance digital pressure transmitter, while the SITRANS P420 offers higher accuracy and additional digital features such as onboard trend recording.

Q2: What applications can SITRANS P320/P420 measure?
They can measure pressure, differential pressure, level, volume flow, and mass flow for liquids, gases, and vapors.

Q3: Do SITRANS P320 and P420 support SIL applications?
Yes. Depending on configuration, they support safety-related applications according to IEC 61508 for SIL 2/3.