Overview

The SITRANS P320/P420 series pressure transmitters are digital instruments characterized by a user-friendly interface and high accuracy. Parameters can be configured via local buttons or through HART fieldbus communication.

An extensive range of functions makes these pressure transmitters ideally suited to the needs of industrial plants. Despite the multitude of configuration options available, operation remains remarkably simple.

Leveraging advanced self-diagnostic functions compliant with the NAMUR NE107 standard, the SITRANS P320/P420 pressure transmitters are particularly well-suited for applications within the chemical industry. Their robust self-diagnostic capabilities—combined with the ability to store process variables—ensure that the SITRANS P420 is fully equipped to meet the demands of the "digital age."

The "Remote Safety Commissioning" feature delivers significant time and cost savings for customers, as SIL safety functions can be remotely enabled via SIMATIC PDM software. This eliminates the need for on-site travel and bypasses the steps typically required for local configuration using the device's buttons and display.

By integrating innovative EDD files into a Quick Start Wizard, the process of configuring parameters via the HART communication protocol has been made exceptionally simple and fast.

The transmitters can be connected to various types of remote seal assemblies, enabling their use in specialized applications—such as those involving highly viscous media.

Different models within the SITRANS P320/P420 series are available to measure:

• Gauge pressure

• Absolute pressure

• Differential pressure

• Level

• Volumetric flow

• Mass flow

Advantages

• Self-diagnostic functions compliant with NAMUR recommendation NE107

• SIL functional safety certification in accordance with IEC 61508

• SIL activation can be performed remotely via SIMATIC PDM

• Reduced internal inductance value, achieving Li = 0 in Ex explosion-proof applications

• Step response time T63 = 105 ms for absolute/gauge pressure models; 135 ms for differential pressure models

• Minimal conformity error

• Extremely low temperature influence

• High long-term stability

• High quality and long service life

• Maintains high reliability under extreme chemical and mechanical loads

• Suitable for corrosive and non-corrosive gases, vapors, and liquids

• Extensive diagnostic and simulation functions

• Separation of measuring cell and electronics; no recalibration required

• Wetted parts constructed from high-grade materials (e.g., stainless steel, Hastelloy, gold,

Monel, tantalum)

• Continuously adjustable transmitter measuring range: 0.01 bar to 700 bar (0.15 psi to 10,153 psi)

• Parameterization via 4 local pushbuttons and HART fieldbus communication