Specs at a glance
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Max. measurement error
Volume flow: ±0.5 % o.r.± 1 mm/s (0.04 in/s)
Option: ±0.2 % o.r. ± 2 mm/s (0.08 in/s) -
Measuring range
0.06 dm3/min to 600 m3/h (0.015 gal/min to 2650 gal/min)
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Medium temperature range
0 to +60 °C (+32 to +140 °F), 0 to +80 °C (+32 to +176 °F), –20 to +50 °C (–4 to +122 °F), –20 to +180 °C (–4 to +356 °F), –20 to +150 °C (–4 to +266 °F)
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Max. process pressure
PN 40, Cl. 300, JIS 20 K
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Wetted materials
Liner: Polyurethane, Hard rubber, PFA, PTFE, Natural rubber
Electrodes: 1.4435/304L, Alloy C-22, Tantalum, Platinum, Duplex 1.4465, Tungsten carbide, Titanum
Field of application
Promag S is the specialist for inhomogeneous, abrasive and corrosive fluids. The robust sensor design, featuring industry-optimized liners, enables its use in most challenging surroundings and metering jobs such as sewage treatment, pulp and paper production or in the primaries and metals industry. Due to its high-performance transmitter, Promag 55S not only measures flow reliably, but also calculates solids content at low maintenance requirements.
The bidirectional measuring principle is virtually independent of pressure, density, temperature and viscosity
Ideal for the most demanding applications with high solids content and high abrasion.
Device properties
Intensified coil system
Large range of liners
Solids content up to 80 % by weight
4-line backlit display with touch control
Two switch outputs
HART, PROFIBUS PA/DP, FOUNDATION Fieldbus
Benefits
Superb signal stability due to unique signal processing
Maximum safety – industry-optimized measuring electrodes and linings
Energy-saving flow measurement – no pressure loss due to cross-section constriction
Maintenance-free – no moving parts
Highest performance – with integrated solids measurement for demanding fluids
Highest safety – integrated electrode cleaning
Automatic recovery of data for servicing
Videos
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The Electromagnetic Flow Measuring Principle
Xpert selection
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Specialized products
- Designed for demanding applications
Technical excellence
Simplicity
Variable

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Standard products
- Reliable, robust and low-maintenance
Technical excellence
Simplicity
-
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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Measuring principle
Electromagnetic
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Product headline
The flowmeter with outstanding abrasion resistance and integrated solids content diagnostics.
Superb signal stability due to unique signal processing.
Ideal for the most demanding applications with high solids content and high abrasion. -
Sensor features
Maximum safety – industry-optimized measuring electrodes and linings. Energy‐saving flow measurement – no pressure loss due to cross section constriction. Maintenance‐free – no moving parts.
Intensified coil system. Large range of liners. Solids content up to 80 % by weight. -
Transmitter features
Highest performance – with integrated solids measurement for demanding fluids. Highest safety – integrated electrode cleaning. Automatic recovery of data for servicing.
4-line backlit display with touch control. Two switch outputs. HART, PROFIBUS PA/DP, FOUNDATION Fieldbus. -
Nominal diameter range
DN 15...600
1/2"...24" -
Wetted materials
Liner: Polyurethane, Hard rubber, PFA, PTFE, Natural rubber
Electrodes: 1.4435/304L, Alloy C-22, Tantalum, Platinum, Duplex 1.4465, Tungsten carbide, Titanum -
Measured variables
Volume flow, electrical conductivity, mass flow
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Max. measurement error
Volume flow: ±0.5 % o.r.± 1 mm/s (0.04 in/s)
Option: ±0.2 % o.r. ± 2 mm/s (0.08 in/s) -
Measuring range
0.06 dm3/min to 600 m3/h (0.015 gal/min to 2650 gal/min)
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Max. process pressure
PN 40, Cl. 300, JIS 20 K
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Medium temperature range
0 to +60 °C (+32 to +140 °F), 0 to +80 °C (+32 to +176 °F), –20 to +50 °C (–4 to +122 °F), –20 to +180 °C (–4 to +356 °F), –20 to +150 °C (–4 to +266 °F)
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Ambient temperature range
–40 to +60 °C (–40 to +140 °F)
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Sensor housing material
Aluminum coated AlSi10Mg, carbon steel with protective varnish
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Transmitter housing material
Powder-coated die-cast aluminum
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Degree of protection
Standard: IP 67 (Type 4X enclosure) for transmitter and sensor
Optional: IP 68 (Type 6P enclosure) for remote version of Promag S sensor -
Display/Operation
Liquid-crystal display: illuminated, four lines with 16 characters per line
Onsite operation with three optical sensor keys -
Outputs
4...20mA
(active/passive) Pulse-/ Frequency output (active/passive)
Two status outputs -
Inputs
Status
Current input -
Digital communication
HART, PROFIBUS DP/PA, FOUNDATION Fieldbus
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Power supply
AC 20 to 260 V
DC 20 to 64 V -
Hazardous area approvals
ATEX, FM, CSA, UK Ex
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Product safety
CE, C-tick, EAC marking
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Pressure approvals and certificates
CRN, PED
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Material certificates
3.1 material
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Hygienic approvals and certificates
Drinking water approval:ACS, KTW/W270, NSF 61, WRAS BS 6920
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