Specs at a glance
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Max. measurement error
Volume flow (standard): ±0.5 % o.r. ± 1 mm/s (0.04 in/s)
Volume flow (option): ±0.2 % o.r. ± 2 mm/s (0.08 in/s), Flat Spec -
Measuring range
9 dm³/min to 162 000 m³/h (2.5 gal/min to 100 000 gal/min)
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Medium temperature range
Liner material hard rubber: 0 to +80 °C (+32 to +176 °F)
Liner material polyurethane: –20 to +50 °C (–4 to +122 °F)
Liner material PTFE: –20 to +90 °C (–4 to +194 °F) -
Max. process pressure
PN 40, Class 300, 20K
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Wetted materials
Liner material hard rubber: 0 to +80 °C (+32 to +176 °F)
Liner material polyurethane: –20 to +50 °C (–4 to +122 °F)
Liner material PTFE: –20 to +90 °C (–4 to +194 °F)
Electrodes: 1.4435 (316L); Alloy C22, 2.4602 (UNS N06022); Tantalum
Field of application
With its international approvals for custody transfer as well as drinking water, Promag W serves the broadest variety of applications. It is available as both compact or remote version. Promag W 400 saves time and costs thanks to the broad functionality of its transmitter optimized for Water & Wastewater. In addition, Heartbeat Technology ensures measurement reliability and compliant verification.
The bidirectional measuring principle is virtually independent of pressure, density, temperature and viscosity
Ideal for water measurement , e.g. drinking water, utility water and industrial/municipal wastewater
Device properties
International drinking water approvals
Degree of protection IP68 (Type 6P enclosure)
Approved for custody transfer to MI-001/OIML R49
Transmitter housing made of durable polycarbonate or aluminium
WLAN access
Integrated data logger: measured values monitoring
Benefits
Reliable measurement at constant accuracy with 0 x DN inlet run and no pressure loss
Flexible engineering – sensor with fixed or lap-joint process connections
Application fitness – EN ISO 12944 corrosion protection for underground or underwater installation
Improved plant availability – sensor compliant with industry-specific requirements
Safe operation – no need to open the device
Time-saving local operation without additional software and hardware – integrated web server
Integrated verification and build-up detection – Heartbeat Technology
Videos
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The world's first electromagnetic flowmeter for unrestricted measurements
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Introduction of Proline Web server
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The Electromagnetic Flow Measuring Principle
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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Measuring principle
Electromagnetic
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Product headline
Versatile standard flowmeter for the water and wastewater industry.
Reliable measurement at constant accuracy with 0 x DN inlet run and no pressure loss.
Ideal for water measurement, e.g. drinking water, utility water and industrial/municipal wastewater. -
Sensor features
Flexible engineering – sensor with fixed or lap-joint process connections. Application fitness – EN ISO 12944 corrosion protection for underground or underwater installation. Improved plant availability – sensor compliant with industry-specific requirements.
International drinking water approvals. Degree of protection IP68 (Type 6P enclosure). Approved for custody transfer to MI-001/OIML R49. -
Transmitter features
Safe operation – no need to open the device due to display with touch control, background lighting. Time‐saving local operation without additional software and hardware – integrated web server. Integrated verification – Heartbeat Technology.
Transmitter housing made of durable polycarbonate or aluminium. WLAN access. Integrated data logger: measured values monitoring. -
Nominal diameter range
DN 25 to 2400 (1 to 90")
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Wetted materials
Liner material hard rubber: 0 to +80 °C (+32 to +176 °F)
Liner material polyurethane: –20 to +50 °C (–4 to +122 °F)
Liner material PTFE: –20 to +90 °C (–4 to +194 °F)
Electrodes: 1.4435 (316L); Alloy C22, 2.4602 (UNS N06022); Tantalum -
Measured variables
Volume flow, conductivity, mass flow
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Max. measurement error
Volume flow (standard): ±0.5 % o.r. ± 1 mm/s (0.04 in/s)
Volume flow (option): ±0.2 % o.r. ± 2 mm/s (0.08 in/s), Flat Spec -
Measuring range
9 dm³/min to 162 000 m³/h (2.5 gal/min to 100 000 gal/min)
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Max. process pressure
PN 40, Class 300, 20K
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Medium temperature range
Liner material hard rubber: 0 to +80 °C (+32 to +176 °F)
Liner material polyurethane: –20 to +50 °C (–4 to +122 °F)
Liner material PTFE: –20 to +90 °C (–4 to +194 °F) -
Ambient temperature range
Liner material hard rubber: 0 to +80 °C (+32 to +176 °F)
Liner material polyurethane: –20 to +50 °C (–4 to +122 °F) -
Sensor housing material
DN 25 to 300 (1 to 12"): AlSi10Mg, coated
DN 25 to 2000 (1 to 78"): Carbon steel with protective varnish
Sensor connection housing (standard): AlSi10Mg, coated
Sensor connection housing (option): Polycarbonate -
Transmitter housing material
Polycarbonat; AlSi10Mg, coated
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Degree of protection
Compact version: IP66/67, type 4X enclosure
Sensor remote version (standard): IP66/67, type 4X enclosure
Sensor remote version (option): IP68, type 6P enclosure, with protective varnish
according to EN ISO 12944 C5‐M/Im1/Im2/Im3
Transmitter remote version: IP66/67, Type 4X enclosure -
Display/Operation
4‐line backlit display with touch control (operation from outside)
Configuration via local display, web browser and operating tools possible -
Outputs
3 ouputs:
0‐20 mA/4‐20 mA HART (active)
Pulse/frequency/switch output (passive)
Pulse/frequency output (passive)
Switch output (passive) -
Inputs
Status input
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Digital communication
HART, PROFIBUS DP, EtherNet/IP, Modbus RS485
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Power supply
AC 100…240 V / AC/DC 24 V
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Hazardous area approvals
cCSAus
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Metrological approvals and certificates
Calibration performed on accredited calibration facilities (acc. to ISO/IEC 17025), NAMUR
Custody transfer according to MI‐001 or OIML R49 (optional class I in combination with 0DN inlet run) -
Pressure approvals and certificates
CRN
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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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