
Specs at a glance
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Max. measurement error
Mass flow (liquid): ±0.1 %
Volume flow (liquid): ±0.1 %
Mass flow (gas): ±0.35 % Density (liquid): ±0.0005 g/cm³ -
Measuring range
0 to 450 kg/h (0 to 16.54 lb/min)
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Medium temperature range
-50 to 205 °C (-58 to 401 °F)
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Max. process pressure
430.9 bar (6250 psi)
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Wetted materials
Measuring tube: stainless steel, 1.4435 (316/316L); Alloy C22
Field of application
Promass A is ideal for continuous process control in very demanding applications. Its unique self-drainable single-tube system enables accurate measurement of liquids and gases at lowest flow rates and high pressure. With its compact transmitter Promass A 300 offers high flexibility in terms of operation and system integration: access from one side, remote display, improved connectivity options. Heartbeat Technology ensures measurement reliability and compliant verification.
Measuring principle operates independently of physical fluid properties such as viscosity or density
Suitable for applications with smallest flow quantities in all industries.
Device properties
Nominal diameter: DN 1 to 4 (1/24 to 1/8")
Process pressure up to 430.9 bar (6250 psi)
Medium temperature up to +205 °C (+401 °F)
Compact dual-compartment housing with up to 3 I/Os
Backlit display with touch control and WLAN access
Remote display available
Benefits
Space-saving installation – compact, lightweight sensor
Highest product quality – self-drainable measuring tube design in all line sizes
Optimum process safety – resistant to corrosive ambient conditions and internal clogging
Full access to process and diagnostic information – numerous, freely combinable I/Os and fieldbuses
Reduced complexity and variety – freely configurable I/O functionality
Integrated verification – Heartbeat Technology
Videos
Extended selection
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High-end products
- Highly functional and convenient
Technical excellence
Simplicity

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Standard products
- Reliable, robust and low-maintenance
Technical excellence
Simplicity
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Specialized products
- Designed for demanding applications
Technical excellence
Simplicity
Variable
FLEX selections | Technical excellence | Simplicity |
---|---|---|
Fundamental selection Meet your basic measurement needs |
Technical excellence
|
Simplicity
|
Lean selection Handle your core processes easily |
Technical excellence
|
Simplicity
|
Extended selection Optimize your processes with innovative technologies |
Technical excellence
|
Simplicity
|
Xpert selection Master your most challenging applications |
Technical excellence
|
Simplicity
Variable |
Predecessor
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Technical Information (TI)
Proline Promass A 300
English version - 09/2020
Coriolis flowmeter
EN 01/09/202016/09/201915/07/201901/11/201801/08/2018Language:
English
Version:
01/09/2020
File size:
10.6 MB
File name:
TI01374DEN_0520.pdf
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-
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Installation Instructions (EA)
Replacing the electronics
English version - 06/2021
Promag, Promass, Prosonic Flow 300, 500, 500-digital, t-mass 300, 500-digital
EN 01/06/202131/07/202002/08/201902/01/201901/06/2018Language:
English
Version:
01/06/2021
File size:
1 MB
File name:
EA01145DA2_0621.pdf
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-
-
Technical Information (TI)
Proline Promass A 300
Coriolis flowmeter
EN 01/09/202016/09/201915/07/201901/11/201801/08/2018Language:
English
Version:
01/09/2020
File size:
10.6 MB
File name:
TI01374DEN_0520.pdf
-
-
-
Operating Instruction (BA)
Proline Promass A 300 Modbus RS485
Coriolis flowmeter
EN 01/09/202001/09/201901/08/2018Language:
English
Version:
01/09/2020
File size:
7.3 MB
File name:
BA01842DEN_0320.pdf
-
-
-
Operating Instruction (BA)
Proline Promass A 300 EtherNet/IP
Coriolis flowmeter
EN 01/09/202001/08/2018Language:
English
Version:
01/09/2020
File size:
7.7 MB
File name:
BA01844DEN_0220.pdf
-
-
-
Operating Instruction (BA)
Proline Promass A 300 HART
Coriolis flowmeter
EN 01/09/202001/09/201901/08/2018Language:
English
Version:
01/09/2020
File size:
8.2 MB
File name:
BA01816DEN_0320.pdf
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-
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Operating Instruction (BA)
Proline Promass A 300 PROFIBUS DP
Coriolis flowmeter
EN 01/09/202001/06/2018Language:
English
Version:
01/09/2020
File size:
6.7 MB
File name:
BA01857DEN_0220.pdf
-
-
-
Operating Instruction (BA)
Proline Promass A 300 PROFINET
Coriolis flowmeter
EN 01/09/202016/09/201915/07/201901/08/2018Language:
English
Version:
01/09/2020
File size:
9.7 MB
File name:
BA01840DEN_0420.pdf
-
-
-
Operating Instruction (BA)
Proline Promass A 300 PROFIBUS PA
Coriolis flowmeter
EN 01/09/202001/11/201801/08/2018Language:
English
Version:
01/09/2020
File size:
6.6 MB
File name:
BA01841DEN_0320.pdf
-
-
-
Operating Instruction (BA)
Proline Promass A 300 FOUNDATION Fieldbus
Coriolis flowmeter
EN 01/09/202001/08/2018Language:
English
Version:
01/09/2020
File size:
6.7 MB
File name:
BA01843DEN_0220.pdf
-
-
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Device Parameter (GP)
Proline Promass 300 PROFIBUS PA Description of Device Parameters
Coriolis flowmeter
EN 01/11/201801/08/201802/08/2016Language:
English
Version:
01/11/2018
File size:
2.2 MB
File name:
GP01058DEN_0318.pdf
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-
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Device Parameter (GP)
Proline Promass 300 FOUNDATION Fieldbus Description of Device Parameters
Coriolis flowmeter
EN 01/08/201801/11/2016Language:
English
Version:
01/08/2018
File size:
2.4 MB
File name:
GP01094DEN_0218.pdf
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Kit power supply, 100-230VAC, Ex
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Power supply
Drawing numberOrder code3171323007 -
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Kit power supply, 24VDC, Ex
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Power supply
Drawing numberOrder code3171323008 -
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Kit pow.supply,100-230VAC/24VDC, Non-haz
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Power supply
Drawing numberOrder code3171323009 -
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ISEM electronic module, Promass 300/500
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Electronic
Drawing numberOrder code33XPD0028- -
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Kit T-DAT, 100/300/400/500/500 digital
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Memory
Drawing numberOrder code3971185788 -
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I/O module, slot 1, 300/500
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I/O module
Drawing numberOrder code34XPD0037- -
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Kit module cartridge, 300/500, Ex
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Electronic (periphery)
Drawing numberOrder code3771323010 -
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Kit module cartridge, 300/500, Non-haz
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Electronic (periphery)
Drawing numberOrder code3771323011 -
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I/O module, slot 2/3/4, 300/500
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I/O module
Drawing numberOrder code35XPD0038- -
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Kit ISEM ribbon cable, 300/500
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Connection (electrical)
Drawing numberOrder code4671323005 -
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Display module, 300/500/DKX001
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Display
Drawing numberOrder code50XPD0031- -
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Kit conn.terminal option A,300/500,N-haz
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Terminal module
Drawing numberOrder code4571323073 -
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Kit conn.terminal option B, 300, Non-haz
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Terminal module
Drawing numberOrder code4571323074 -
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Kit conn.terminal option C,300/500,N-haz
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Terminal module
Drawing numberOrder code4571327818 -
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Kit conn.terminal option A, 300/500, Ex
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Terminal module
Drawing numberOrder code4571323075 -
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Kit conn.terminal option B, 300/500, Ex
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Terminal module
Drawing numberOrder code4571323076 -
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Kit conn.terminal option C, 300/500, Ex
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Terminal module
Drawing numberOrder code4571327819 -
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Kit terminal, transm.,remote display,300
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Terminals
Drawing numberOrder code4971323079 -
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Kit cover, sight glass, Alu,Non-haz/Exde
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Cover
Drawing numberOrder code2071323016 -
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Kit cover,glass, Alu, -50oC,Non-haz/Exde
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Cover
Drawing numberOrder code2071323017 -
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Kit cover, blind, Alu, Non-haz/Exde
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Cover
Drawing numberOrder code2171323018 -
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Kit cover, blind, Alu,-50oC,Non-haz/Exde
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Cover
Drawing numberOrder code2171323019 -
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Kit cover, sight glass, Alu, Exd
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Cover
Drawing numberOrder code2071323020 -
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Kit cover, sight glass, Alu, -50oC, Exd
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Cover
Drawing numberOrder code2071323021 -
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Kit cover, blind, Alu, Exd
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Cover
Drawing numberOrder code2171323022 -
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Kit cover, blind, Alu, -50oC, Exd
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Cover
Drawing numberOrder code2171323023 -
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Kit cover gasket, sight glass/blind
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Sealing
Drawing numberOrder code7071323026 -
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Kit cover gasket,sight glass/blind,-50oC
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Sealing
Drawing numberOrder code7071323027 -
-
Kit cover, electr.compart., Alu, Non-haz
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Cover
Drawing numberOrder code2271323028 -
-
Kit cover,electronic, Alu,- 50oC,Non-haz
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Cover
Drawing numberOrder code2271323029 -
-
Kit cover gasket,electr.compart.,Non-haz
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Sealing
Drawing numberOrder code7471323030 -
-
Kit cover gasket,electr., -50oC, Non-haz
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Sealing
Drawing numberOrder code7471323031 -
-
Kit cover, electronic compart., Alu, Ex
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Cover
Drawing numberOrder code2271323032 -
-
Kit cover, electr.compart., Alu,-50oC,Ex
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Cover
Drawing numberOrder code2271323033 -
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Kit cover gasket, electronic compart.,Ex
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Sealing
Drawing numberOrder code7471323036 -
-
Kit cover gasket,elect.compart.,-50oC,Ex
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Sealing
Drawing numberOrder code7471323037 -
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Kit cover, remote display, Alu
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Cover
Drawing numberOrder code2871323044 -
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Kit cover, remote display, Alu, -50oC
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Cover
Drawing numberOrder code2871323045 -
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Kit cover gasket, remote display
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Sealing
Drawing numberOrder code7671323048 -
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Kit cover gasket, remote display, -50oC
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Sealing
Drawing numberOrder code7671323049 -
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Kit interface gaskets, 300/500
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Sealing
Drawing numberOrder code7171323071 -
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Kit interface gaskets, 300/500, -50oC
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Sealing
Drawing numberOrder code7171323072 -
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Kit interface gaskets, Promass 300, hyg.
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Sealing
Drawing numberOrder code7171368491 -
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Kit protect.cover option A,300/500,N-haz
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Miscellaneous
Drawing numberOrder code1171368488 -
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Kit protective cover optionB,300,Non-haz
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Miscellaneous
Drawing numberOrder code1171368489 -
-
Kit protective cover option A,300/500,Ex
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Miscellaneous
Drawing numberOrder code1171323081 -
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Kit protective cover option B,300/500,Ex
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Miscellaneous
Drawing numberOrder code1171323082 -
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Spare RFID TAG