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Proline Promag L 400
Electromagnetic flowmeter

The flowmeter with integrated web server and a weight-optimized sensor

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

  • Introduction of Proline Web server

Promag L is the versatile standard sensor designed for the water industry with a lap-joint flange concept for flexible installation independent of the orientation of the pipe flange pitch diameter. Combined with Proline 400, the transmitter for optimized measurement of water and wastewater, Promag L 400 will be the preferred solution for all standard applications in this industry. Promag L 400 also offers an integrated web server. Integrated verification with Heartbeat Technology.


  • Reduced installation costs – flexible mounting by one-of-a-kind lap-joint flange concept (DN < 350/14")

  • 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

  • Fully suitable for standard applications in the water and wastewater industry.

Device properties

  • Up to 30% less sensor weight

  • Nominal diameter: DN 25 to 2400 (1 to 90")

  • Maximum reduced installation length to DVGW/ISO

  • 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 50L, Promag 53L, 5L4B

Success stories


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