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SITRANS P DS III 7MF443 pressure transmitter
SITRANS P DS III:
7MF403
7MF423
7MF433
7MF443
7MF453
7MF463
7MF4912
7MF2741
Description

1.Product introduction
SITRANS P DS III pressure transmitters are digital pressure transmitters featuring extensive user-friendliness and high accuracy.The parameterization is performed using control keys or via HART, PROFIBUS-PA or FOUNDATION Fieldbus interface.Extensive functionality enables the pressure transmitter to be precisely adapted to the plant’s requirements. Operation is very simple in spite of the numerous setting options.Transmitters with type of protection "Intrinsic safety" and "Explosion-proof" may be installed within potentially explosive atmospheres(zone 1) or in zone 0. The transmitters are provided with an EC type examination certificate and comply with the corresponding harmonized European standards (ATEX). The transmitters can be equipped with various designs of remote seals for special applications such as the measurement of highly viscous substances.Various versions of the DS III pressure transmitters are available for measuring:
• Gauge pressure
• Absolute pressure
• Differential pressure
• Level

• Volume level
• Mass level
• volume flow
• Mass flow
2.Benefits
• High quality and service life
• High reliability even under extreme chemical and mechanical loads
• For aggressive and non-aggressive gases, vapors and liquids
• Extensive diagnosis and simulation functions
• Separate replacement of measuring cell and electronics without recalibration
• Minimum conformity error
• Good long-term stability
• Wetted parts made of high-grade materials (e.g. stainless steel, Hastelloy, gold, Monel, tantalum
• Infinitely adjustable span from 0.01 bar to 700 bar(0.15 psi to 10153 psi) for DS III with HART interface
• Nominal measuring range from 1 bar to 700 bar(14.5 psi to 10153 psi) for DS III with PROFIBUS PA and FOUNDATION Fieldbus interface
• High measuring accuracy
• Parameterization over control keys and HART or PROFIBUS PA, or FOUNDATION Fieldbus interface.
3.Application
The pressure transmitters of the DS III series, can be used in industrial areas with extreme chemical and mechanical loads.Electromagnetic compatibility in the range 10 kHz to 1 GHz makes the DS III pressure transmitters suitable for locations with high electromagnetic emissions.Pressure transmitters with type of protection "Intrinsic safety" and"Explosion-proof" may be installed within potentially explosive atmospheres(zone 1) or in zone 0. The pressure transmitters are provided with an EC type examination certificate and comply with the corresponding harmonized European standards(ATEX).Pressure transmitters with the type of protection "Intrinsic safety"for use in zone 0 may be operated with power supply units of category"ia" and "ib".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 programmed locally using the 3 control buttons
or externally via HART or PROFIBUS PA or FOUNDATION Fieldbus interface. 
4.Related parameters
Pressure transmitter for gauge pressure

Measured variable: Gauge pressure of aggressive and non-aggressive gases, vapors and liquids.
Span (infinitely adjustable) for DS III with HART: 0.01 bar to 700 bar (0.15 psi to 10153 psi)
Nominal measuring range for DS III with PROFIBUS PA and FOUNDATION Fieldbus: 1 bar to 700 bar (14.5 psi to 10153 psi)
Pressure transmitters for absolute pressure
Measured variable: Absolute pressure of aggressive and nonaggressive gases, vapors and liquids.
Span (infinitely adjustable)for DS III with HART: 8.3 mbar a ... 100 bar a (0.12 ... 1450 psia)
Nominal measuring range for DS III with PROFIBUS PA and FOUNDATION Fieldbus: 250 mbar a ... 100 bar a (3.6 ... 1450 psia)
There are two series:
• Gauge pressure series
• Differential pressure series
Pressure transmitters for differential pressure and flow
Measured variables:
• Differential pressure
• Small positive or negative pressure
• Flow q ~ p (together with a primary differential pressure device (see Chap.ter "Flow Meters"))
Span (infinitely adjustable) for DS III with HART: 1 mbar ... 30 bar (0.0145 ... 435 psi)
Nominal measuring range for DS III with PROFIBUS PA and FOUNDATION Fieldbus: 20 mbar ... 30 bar (0.29 ... 435 psi)
Pressure transmitters for level
Measured variable: Level of aggressive and non-aggressive liquids in open and closed vessels.
Span (infinitely adjustable) for DS III with HART: 25 mbar ... 5 bar (0.363 ... 72.5 psi)
Nominal measuring range for DS III with PROFIBUS PA and FOUNDATION Fieldbus: 250 mbar ... 5 bar (3.63 ... 72.5 psi)
Nominal diameter of the mounting flange
• DN 80 or DN 100
• 3 inch or 4 inch
In the case of level measurements in open containers, the lowpressure connection of the measuring cell remains open (measurement
"compared to atmospheric").
In the case of measurements in closed containers, the lowerpressure connection has to be connected to the container in order to compensate the static pressure.The wetted parts are made from a variety of materials, depending on the degree of corrosion resistance required.

  
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