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Proline Promag W 300

Electromagnetic flowmeter specialist for demanding water & wastewater applications with compact, easily accessible transmitter

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SKU: Promag W 300


  • Measuring Range: 9 dm³/min to 162000 m³/h (2.5 gal/min to 100000 gal/min)
  • Accuracy: Volume flow (standard): ±0.5 % of reading ± 1 mm/s (0.04 in/s)
  • Dedicated to the measurement of industrial or municipal water and wastewater
  • Process temperature from –20 to 90 °C, configurable with different liner material
  • Hazardous area, hygienic, material, marine, metrological approvals, and certificates

Fields of application

  • For abrasive fluids (e.g. potter's clay, lime milk, ore slurry)
  • For fluids producing buildup (e.g. wastewater sludge)
  • Drinking water, Utility water, and industrial/municipal wastewater


The premium device for water and wastewater measurement Promag W 300 was designed for reliable use in hazardous areas and under harsh conditions. Its compact transmitter offers high flexibility in terms of operation and system integration: access from one side, remote display and improved connectivity options. Heartbeat Technology ensures compliance and process safety at all times.

General Information
More Information
Measuring principleElectromagnetic
Measured variablesVolume flow, Conductivity, Mass flow
Medium typeLiquid
Flow rate liquid (volumetric flow)9 dm³/min to 162000 m³/h (2.5 to 100 000 gal/min)
Recommended velocity0.01 to 10 m/s 0.03 to 33 ft/s
Min. conductivity≥ 5 μS/cm
Maximum error % liquid (volumetric flow)Standard: ± 0.5 % of reading ± 1 mm/s (0.04 in/s); Optional: ± 0.2 % of reading ± 2 mm/s (0.08 in/s)
Display type4-line backlit display with touch control
Response timeStatus input: Adjustable: 5 to 200 ms;
Modbus RS485: typically 25 to 50 ms
Process temperature range0 to 80 °C (32 to 176 °F) for hard rubber;
-20 to 50 °C (-4 to 122 °F) for polyurethane;
-20 to 90 °C (-4 to 194 °F) for PTFE
Maximum allowable pressurePN 40, Class 300, 20K
More Information
InputsStatus input
4...20 mA input
Output3 outputs:
4...20 mA HART (active/passive)
4...20 mA WirelessHART
4...20 mA (active/passive)
Pulse/frequency/switch output (active/passive)
Double pulse output (active/passive)
Relay output
Communication protocolHART
Modbus RS485
ResolutionCurrent input 0/4…20 mA: 1 µA
Current output 0/4...20 mA/ Ex i : 0.38 µA
Mechanical Data
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Process connectionDN 25 to 2400 (1 to 90"), pressure ratings PN 6/10/16/25/40, Class 150/300, JIS 10K/20K, AWWA C207 Class D, AS 2129 Table E
Flange typeEN (DIN), ASME, JIS, AWWA, AS
Nominal diameter rangeDN 25 to 2400 (1 to 90")
Inlet run≥ 5 × DN
Outlet run≥ 2 × DN
Wetted materialLiner: Polyurethane; Hard rubber, PTFE
Electrodes: 316L; Alloy C22, 2.4602; Tantalum
Electrode material316L; Alloy C22, 2.4602; Tantalum
Tube materialStainless steel: 1.4301, 1.4306, 304, 304L
Housing materialAluminum AlSi10Mg, coated Stainless steel, 1.4404
Degree of protectionAs standard: IP66/67, type 4X enclosure;
External WLAN antenna: IP67
Surface roughnessElectrodes with 316L; Alloy C22, 2.4602; tantalum: ≤ 0.3 to 0.5 µm (11.8 to 19.7 µin)
Electrical Data
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Voltage TypeAC/DC
Power supply24 V DC
100 to 230 V AC
100 to 230 V AC / 24 V DC
Current consumptionTransmitter: Max. 400 mA (24 V) & Max. 200 mA (110 V)
Cable entryCable gland: M20 × 1.5
Thread for cable entry: NPT ½", G ½" & M20
Device plug for digital communication: M12
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Hazardous approvalsATEX, IECEx, cCSAus
Hygienic / Drinking water approvalsACS, KTW/W270, NSF 61, WRAS BS 6920
Other Approvals/ CertificationCE, C-tick, EAC
Functional safety
LR approval, DNV GL approval, ABS approval, LH/BV approval
3.1 Certificate
Additional Information
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Ambient temperature range-40 to 60 °C (-40 to 140 °F)
Storage temperature-20 to 150 °C (-4 to 302 °F)
Mounting typeCompact/ Remote display
Shock resistanceYes
Vibration resistanceYes
Reverse polarity protectionYes (FOUNDATION Fieldbus & PROFIBUS PA)
Galvanic isolationYes
Electromagnetic compatibility (EMC)As per IEC/EN 61326 (NE 21)
PROFIBUS DP: Complies with emission limits for industry as per EN 50170 Volume 2, IEC 61784
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  • 30-day return policy
  • Official reseller
  • Expert engineering support
  • Free delivery in the EU
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  • 30-day return policy
  • Official reseller
  • Expert engineering support
  • Free delivery in the EU
Product Details