• Pressure and Differential Pressure Transmitter

Sitrans P320/420

SITRANS P Siemens Pressure Transmitters are digital transmitters used for Measuring Gauge Pressure, Absolute Pressure. It also can be used in Flow & Level measurement. The Parameter Assignment is performed using input buttons or the HART Interface. The Pressure Transmitter can be used in Zone 1 or Zone 0 with the corresponding Ex-approval.

 

Application

SITRANS P320/420 pressure transmitters can be used in industrial areas with extreme chemical and mechanical loads.

The pressure transmitters can be used in Zone 1 and Zone 0 with the corresponding  Ex approval.

The transmitters can be equipped with various designs of remote seals for special applications such as the measurement of highly viscous substances.

The pressure transmitter can be operated locally over 4 input buttons or programmed externally over HART interface.

 

 

Benefits

Diagnostic functions in accordance with NAMUR recommendation NE 107.

SIL devices developed according to IEC 61508.

SIL validation on the device or remotely with SIMATIC PDM.

Reduction of internal inductance for Ex applications to LI = 0.

Step response time for pressure type T63 = 105 ms and for differential pressure type 135 ms.

Minimal conformity error.

High reliability even under extreme chemical and mechanical loads.

For corrosive and non corrosive gases, vapors and liquids.

Extensive diagnostics and simulation functions.

Separate replacement of measuring cells and electronics without recalibration.

Infinitely adjustable spans from 0.01 bar to 700 bar (0.15 psi to 10,153 psi).

Convenient parameterization over 4 input buttons and HART interface.

Very low temperature influence.

Diaphragm Seal Version
In many cases the pressure transmitter and the measured medium have to be physically separated. It is then necessary to use a remote seal.

 

Diaphragm seal
With diaphragm seals, the pressure is measured by means of a flat diaphragm which rests in a bed.

 

The following types of diaphragm seals exist:

Diaphragm seal of sandwich design without (left) and with a projecting diaphragm (tube) • Sandwich design with projecting diaphragm (tube) to DIN or ASME which are secured using a dummy flange.

Diaphragm seal of flange design without (left) and with a projecting diaphragm (tube) 
• Flange design with projecting diaphragm (tube) to DIN or ASME, secured using holes in the flange.