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Proline Promag W 400
Electromagnetic flowmeter

The flowmeter with integrated web server and a sensor with EN ISO 12944 corrosion protection

  • Electromagnetic flowmeter - Proline Promag W 400 ©Endress+Hauser
  • The Electromagnetic Flow Measuring Principle

  • Introduction of Proline Web server

"Promag W is the specialized sensor for all applications in the water industry. Combined with Proline 400, the transmitter optimized for the measurement of water and wastewater, Promag W 400 will be the ideal solution for any application in this industry. Promag W 400 also offers time-saving local operation via the integrated web server without additional software and hardware. With the integrated Heartbeat Technology™ a device verification is possible at any time.


  • For direct underground installation or permanent underwater use – certified sensor

  • Secure, reliable long-term operation – robust and completely welded sensor

  • Energy-saving flow measurement – no pressure loss due to cross-section constriction

  • Maintenance-free – no moving parts

  • 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™

Field of application

  • The measuring principle is virtually independent of pressure, density, temperature and viscosity

  • The specialist in the water and wastewater industry for the most demanding applications

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

  • Same housing concept for compact/remote version

  • Integrated data logger: measured values monitoring

Features and specifications

Documents / Manuals / Software

Accessories / Spare parts

Predecessor / Successor

Predecessor: Promag 50W, Promag 51P, Promag 51W, Promag 53W, 5W4B

Success stories


Endress+Hauser Inc.
2350 Endress Place Greenwood , IN 46143 United States
Tel.: 888-363-7377
Fax: 317-535-8498
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