Enter at least 2 characters to start the search.

Innovative flow measuring technology for water & wastewater

Ensure cost-time saving and safe operation without process interruption

Whether drinking water, industrial water or wastewater, whether in urban or rural areas – water has become a scarce resource due to worldwide population growth and the associated urbanization. The future aims of sustainable water management are therefore clearly defined: adequate conveying, area-wide distribution, correct billing and finally, optimal treatment. The new Promag 400 offers excellent advantages precisely in such applications ensuring cost and time-saving operation.


  • Accurate billing of the supplied water volumes

  • Assured compliance with guidelines and regulations

  • Reduction of operating costs by means of optimum process automation

Innovative flow measuring technology

The standard-integrated Webserver in the Promag 400 provides one-of-a-kind options for service:

  • Simple access to device and diagnostic data

  • Onsite configuration of functions without additional interfaces

  • Upload and download of configuration data for commissioning other identical measuring points

Besides that, the self-monitoring functions and a service-friendly data storage concept (HistoROM) guarantee seamless operation around the clock.

Heartbeat Technology™ – the smart way to proof-test


Flowmeters in functional safety applications must ensure maximum reliability. Used in Proline flowmeters, Heartbeat Technology™ provides the most comprehensive range of built-in diagnostics along the entire signal chain, offering unparalleled self-monitoring capability, traceable factory calibration and redundant internal references. Failure rates are minimized for complete flexibility to plan proof-testing and other maintenance according to your needs and to reduce exposure of personnel

Traceable Verification

This makes it possible to fulfill the traceability requirements in the context of ISO 9001 without problems – where and when requested without prolonged interruption to the measurement. In fact, verification takes on average a matter of minutes, if not seconds.

  • No need to dismantle the device

  • Creation of inspection reports via webservers or asset management systems

  • Complete documentation of a measuring device’s performance

  • Automatic saving of verification results directly in the device

Sensors for every application

All three sensors – Promag L, W and D – possess internationally recognized drinking water approvals (KTW/W270, ACS, NSF 61, WRAS BS 6920) as well as approvals for custody transfer (in prep.) in accordance with the water meter standards OIML R49 and MI-001. For installation in piping systems, users can select between various nominal diameters (DN 25/1" to 2400/90"), process connections (flange, lap-joint flange, wafer) and linings (polyurethane, hard rubber, PTFE).

Proline Promag L 400 ©Endress+Hauser

Proline Promag L 400

Proline Promag W 400 ©Endress+Hauser

Proline Promag W 400

Proline Promag D 400 ©Endress+Hauser

Proline Promag D 400


Convenient device configuration in the field using cutting-edge web server technology