SITRANS P320/420


Pressure Transmitter

SITRANS P320/420 is the first pressure transmitter on the market to feature remote safety handling. The instruments’ remote safety handling via SIMATIC PDM saves time during SIL commissioning: rather than manually programming each individual device across a facility, operators can access transmitters from the control room. Both pressure transmitters have an increased proof test interval over other devices on the market with testing periods of up to fifteen years rather than every two. This lowers maintenance costs significantly.

Catalog Specifications

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Control Engineering Engineer's Choice Award - USA

Engineers' Choice Award for Process Control Sensors

Spotlight on innovation: SITRANS P320/P420 pressure transmitters were voted best product in the Process Control Sensors category. Engineers' choice winners are awarded based on technological advancement, service to the industry, and market impact.

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  • Reduced commissioning time due to remote safety handling
  • Suitable for harsh conditions due to robust materials
  • User-friendly due to clear and large display and diagnostic icons acc. to NAMUR NE107 and a quick start wizard
  • Maintenance cost reduction due to proof test interval up to 15 years
  • Fast reaction and optimized processes due to reduced response time


0,065 % (SITRANS P320), 0,04 % (SITRANS P420)
Response time
down to 105 ms
Long-Term Stability
≤ 0.125 % / 5 years
Measuring cells
from 20 mbar to 700 bar
Max. Turndown
Measured medium temperature
-40 °C to +100 °C
Certificates/ Approvals
ATEX, IEC EX, FM, CSA, NEPSI and others
SIL-2/3 certification
Developed according to IEC 61508 standards
HART7 communication
4…20 mA/ HART, PROFIBUS PA (in preparation), FOUNDATION Fieldbus (in preparation)
Diaphragm materials
Stainless steel, Hastelloy, Tantalum, Monel, Gold

Measurement applications

SITRANS P320/P420 pressure transmitters are designed for applications where safety is critical: industries such as chemical, oil and gas, and power generation. Pressure transmitters are available with various types of remote seals and different versions for measuring:

  • Gauge pressure
  • Absolute pressure
  • Differential pressure
  • Level
  • Volume Flow
  • Mass Flow

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Safety is key in the process industries. A failure in instruments relevant for safety may have serious implications for humans, the process and the environment. Therefore, a wide range of our process instruments come with on-board safety features for maximum risk reduction.


The portfolio for your process requirements

Every process, every facility, and every environmental constraint brings its own special requirements. For this reason, we have developed SITRANS P pressure transmitters to offer you a complete family of devices with different performances, different capacities, and different materials.

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