Flow measuring technology for the future


Proline 300/500 is prepared for Industrial Internet of Things (IIOT): Thanks to the installed WLAN function, diagnostics, maintenance or service data can be viewed or called up on site using remote retrieval.

For lasting higher levels of safety, product quality, and availability in your process system

For almost 40 years, Endress+Hauser has been offering its customers one of the most comprehensive product ranges worldwide for flow measurement of liquids, gases, and steam. The Proline family of measuring devices has contributed significantly to this success and is now once again “wowing” users with unique innovations to ensure that they receive the highest level of process and product quality.

In various industries requirements regarding safety, legal standards, efficiency, and quality are continuously increasing. In addition, process systems operators must also deal with rising costs and competitive pressure. And last but not least, emerging opportunities for digital interconnectivity through Industrial Internet of Things (IIOT) are gaining significance within process automation.

With numerous innovative functions and device properties, the new Proline 300 and Proline 500 makes universal flow measurement possible in all applications in the process industry – from quantity measurement and process monitoring, right up to monitoring tasks, or measurements in custody transfer business transactions. Proline 300/500 not only measures the flow in pipes with the greatest accuracy, it also provides a view into the process, while ensuring that plant operators receive a wealth of important diagnostic and process data. Users benefit from this in many different ways – for example, through optimal process monitoring, fewer periods of downtime, and therefore a more efficient process control.

Proline 300/500 has been developed entirely in accordance with SIL guidelines (IEC 61508) and thus guarantees the greatest safety during operations. The warning messages displayed in the event of an error in accordance with NAMUR NE107 also contribute to operational safety, as these indicate immediately if a device is defective, requires maintenance, or is running outside the predefined specifications.

Multivariable and high-quality sensors

Since 1993, the Proline device family has been subject to constant development. As a state-of-the-art transmitter, Proline 300/500 can be freely combined with any of the Promass (coriolis) and Promag (electromagnetic) sensors, which have proven themselves time and again. Depending on the measuring principle, several process variables can be measured at the same time using only one device. With the Coriolis flow measuring principle these include mass flow, volume flow, density, concentration, viscosity, or temperature; whereas the electromagnetic measuring principle focuses on volume flow, temperature, and electrical conductivity.

Every Proline 300/500 measuring device is checked using accredited, fully traceable calibration facilities before delivery (ISO/IEC 17025). This is unparalleled around the globe and guarantees the same high level of measurement quality no matter where the production site is located. The robust design of all Endress+Hauser sensors also guarantees optimum measurement performance, even under highly fluctuating process conditions.

Added value thanks to information from the field

Proline 300/500 is equipped with a multitude of functions, which have yet to be beaten and which supply the customer with a maximum amount of process information. It is not only possible to retrieve device, diagnostics, service or process data via the control room, but now also on site thanks to a web server integrated into the measuring device. This allows for direct connection to a laptop without the need for additional software or hardware. Comprehensive remote data retrieval is also possible via the installed wireless WLAN – a global innovation that will simplify future service and maintenance. This also applies to the sophisticated data storage concept known as HistoROM, which automatically restores the configuration data of a measuring device following a service call.

Heartbeat Technology – always have your finger on the pulse of the process

A further highlight is Heartbeat Technology. Integrated into all Proline devices, this checking function enables permanent self-diagnosis, along with extensive monitoring of the values measured, as well as providing a certified and metrological traceability verification during operation. The operator does not need to be present in the field: Verification can be started at any time via all available interfaces. This makes it possible, for example, to extend complex, application-specific calibration cycles, thus saving time and money. All this reduces the complexity and risks involved in a system, and therefore increase its safety.

Looking to the future with Proline – prepared for Industrial Internet of Things (IIOT)

Proline 300/500 has a unique range of signal outputs and protocols: HART, PROFIBUS, FOUNDATION fieldbus, Modbus RS485, EtherNet/IP, and PROFINET. This ensures that customers are able to integrate Endress+Hauser flow meters seamlessly into their existing infrastructures or automation systems. Thanks to the transparent flow of diagnostics and measurement data – from the sensor to the process control system – unimagined possibilities are now becoming reality, ensuring safe and comprehensive process control.


Enquiries:            Frans van den Berg

Product Manager: Flow

Endress+Hauser (Pty) Ltd

Tel: (011) 262 8000




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