Description

Endress+Hauser Proline Promag W 400 Electromagnetic Flowmeter

The Endress+Hauser Proline Promag W 400 is an industrial-grade Electromagnetic Flowmeter engineered specifically for volumetric and mass tracking of conductive process liquids within municipal water infrastructure, raw water abstraction, and industrial effluent lines. Acting as a highly adaptable inline sensor, this magnetic fluid monitoring solution serves primary distribution networks, remote wastewater stations, and legal-for-trade billing nodes.

Operating on Faraday's law of electromagnetic induction, the meter features an advanced IP68-rated physical architecture, allowing for permanent underground direct burial or continuous underwater deployment in flood-prone utility chambers. Its specialized internal design enables precise fluid logging without strict straight-pipe layout constraints, making it the premier retrofit choice for space-restricted modern pipeline grids.

Technical Specifications & Key Performance Parameters: Promag W 400

The following dataset defines the operational boundaries, certified precision levels, configurations, and communication protocols of the Promag W 400 inline magmeter platform:

Technical Feature	Certified Operational Data & Material Specifications
Monitored Variables	Volume flow, Electrical Conductivity, and Mass flow
Available Nominal Diameters	DN 25 up to DN 3000 (1" through 120" pipe sizes)
Measurement Accuracy	Standard Calibration: ±0.5% o.r. / Optional Flat Spec: ±0.2% o.r.
Ingress Protection Rating	IP68 (Type 6P enclosure) for permanent underwater or subgrade soil burial
Custody Transfer Approvals	Optional Legal-for-trade billing via MI-001 and OIML R49 Class I certifications
Corrosion Protection Standard	EN ISO 12944 compliant housing (Optional heavy-duty C5-M coating)
Smart Digital Features	Built-in Web Server, local secure WLAN interface, and Heartbeat Technology / Data Logger

Looking for Alternative Flow Measurement Technologies?
If your pipeline carries non-conductive mediums, steam loops, or extreme thermal gases where magnetic meters cannot operate, we recommend switching to an industrial Vortex Flowmeter. For non-invasive, clamp-on liquid auditing on live operational mains without cutting pipes, explore our non-contact Ultrasonic Flow Meter range. For high-precision mass-based fluid logging, consider our heavy-duty Coriolis Flowmeter systems.

Target Applications & Compatible Process Fluids

Thanks to its robust physical construction and international water approvals, the Promag W 400 is tailored for demanding municipal and industrial fluid environments:

Municipal Supply & Distribution Networks: Raw water intake, bulk main distribution grids, and high-volume custody transfer utility billing nodes.
Wastewater & Sewage Treatment Infrastructures: Raw sewage discharge, storm-water basins, sludge processing, and chemical dosing lines.
Submerged & Directly Buried Utility Sites: Unventilated underground vaults, floodplains, and permanently submerged pipeline pits.
Compatible Flow Media: Conductive process liquids (conductive threshold > 20 µS/cm), including drinking water, river water, wastewater, and mild industrial effluent.

Engineering Advantages of the E+H Promag W 400 Magmeter

1. Space-Saving 0 x DN Zero-Pipe-Run Configuration

Traditional electromagnetic sensors require extensive straight piping runs (e.g., 5 x DN upstream / 2 x DN downstream) to eliminate fluid turbulence. The Promag W 400 offers a specialized 0 x DN full-bore mechanical design that completely eliminates inlet and outlet straight pipe run requirements. Engineers can bolt the sensor directly downstream of pipe bends, valves, or pumps without sacrificing accuracy—ideal for compact valve vaults and tight retrofits.

2. Submersible IP68 Enclosure for Hazardous Pits

Subgrade installations often face seasonal groundwater flooding. Featuring a certified IP68 (Type 6P) ingress rating and optional EN ISO 12944 C5-M anti-corrosion coating, the transmitter and sensor can operate continuously under water or buried directly in damp soil, saving thousands of dollars in vault construction costs.

3. Legal-for-Trade Billing & Revenue Protection

For municipal water authorities, inaccurate metering means revenue loss. With optional OIML R49 and MI-001 approvals, combined with an onboard historical data logger, the Promag W 400 delivers tamper-proof, legal-for-trade custody transfer measurement across peak and off-peak flow rates.

4. Wireless Maintenance via Integrated Web Server & WLAN

Field technicians no longer need to open transmitter housings in rainy or dusty environments. With built-in secure WLAN and an integrated web server, operators can execute routine diagnostics, adjust settings, and export diagnostic logs wirelessly using any standard laptop or mobile phone from ground level.

In comprehensive municipal water automation networks, flow metering is only one piece of the puzzle. To prevent catastrophic water hammer events, line ruptures, or reservoir overflow, connect your real-time flow data with our heavy-duty Pressure Transmitters and precision Level Meters for a fully integrated system.

Field Case Study: Flood-Prone Subgrade Utility Metering

Challenge: A regional water provider suffered from revenue loss due to low-velocity measurement inaccuracies from aging mechanical meters. The installation pit was situated in a low-lying area subject to recurring seasonal groundwater flooding, which regularly damaged standard electronics.

Solution: Hanyu Zhilian supplied the specialized Promag W 400 Remote IP68 version equipped with OIML R49 Class I approval, enabling remote electronics installation while the IP68 sensor remained submerged in the pit.

Results:

8% Billing Accuracy Increase: Precise electromagnetic measurement captured low off-peak flow rates previously missed by mechanical meters.
Zero Downtime During Floods: The IP68 sensor operated flawlessly throughout a two-week continuous submersion event during severe seasonal rainfall.

Endress+Hauser Promag W 400 Flowmeter - Frequently Asked Questions (FAQs)

Q1: Can the Promag W 400 flowmeter be buried directly in soil without a concrete vault?

Yes. When configured with the certified IP68 (Type 6P) enclosure and optional EN ISO 12944 C5-M corrosion protection coating, the Promag W 400 sensor is specifically engineered for permanent direct soil burial or continuous underwater submersion, significantly reducing civil construction costs.

Q2: Does the 0 x DN full-bore option cause pressure loss in the main pipeline?

No. Unlike mechanical meters or restricted-bore magmeters, the Promag W 400 0 x DN option features a unrestricted full-bore design. It creates zero hydraulic restriction, ensuring no pressure drop or increased pumping energy costs across the distribution network.

Q3: How does the Promag W 400 handle custody transfer billing during low-flow periods?

With optional MI-001 and OIML R49 Class I certifications, the meter maintains high measurement sensitivity even at low fluid velocities during off-peak night hours, protecting municipal water suppliers from unmetered revenue loss.

Q4: Can engineers perform wireless diagnostics on a submerged Promag W 400 transmitter?

Yes. Via its secure built-in WLAN interface and local web server, field technicians can inspect device status, tweak settings, and download diagnostic reports wirelessly from a distance using a laptop or smartphone without opening the enclosure.

Q5: What is the accuracy difference between standard calibration and the Flat Spec option?

Standard factory calibration offers an accuracy of ±0.5% of reading. For critical custody transfer or high-precision billing nodes, the optional premium Flat Specification calibration tightens the margin of error to ±0.2% of reading.

Q6: Can the Promag W 400 measure non-conductive water, such as RO or demineralized water?

No. Electromagnetic flowmeters operate based on Faraday's law and require a minimum fluid conductivity (> 20 µS/cm). For ultra-pure or non-conductive water, steam, or gas loops, alternative technologies like ultrasonic or vortex flowmeters should be used.

Q7: How does the built-in data logger secure measurement history during power outages?

The internal hardware data logger continuously archives totalized volume, diagnostic alerts, and operational trends in non-volatile memory. This ensures a tamper-proof digital paper trail for billing verification even during local power grid interruptions.

Q8: Which liner material is best suited for abrasive sewage or sludge lines?

To withstand mechanical abrasion from grit, sand, and suspended solids common in wastewater, the flow tube can be fitted with durable Polyurethane or Hard Rubber liners to extend operational lifespan.

Endress+Hauser Promag W 400 Electromagnetic Flowmeter