The ROSEN EMAT flowmeter background

Insonify your flow

Excelling under extreme conditions

ROSEN has a long history of using of Electromagnetic Acoustic Transducers (EMAT) for the inspection of oil and gas pipelines. This technology we have refined to create an industrial flowmeter for liquid, gas, steam and multiphase applications.

We use broadband ultrasonic waves to insonify an entire pipe section in an unique manner.

This enables highly accurate and stable measurements even under difficult conditions and in the face of disturbances for an extremly wide range of application.

The EMAT Flowmeter comes as a non-intrusive, retrofittable flowmeter. It’s easy to install – no need for process interruptions, shutdowns or couple media preparations.

Steam is fading into the air in front of a dark background


While steam flow measurement is especially important in power plants, process heat and steam distribution are also measured in many other industries. In the oil & gas industry, for example, steam is an important tool for enhanced oil recovery.

Burning gas


Our insonification technology handles gases from low to high pressure. The EMAT Flowmeter is suitable for flow measurement in pipelines for all kind of gases. It can serve as a check meter in gas distribution, for emission control, or as a meter for flare gas, shale gas, LNG and CNG.

Liquid water flow


The EMAT Flowmeter provides highly accurate flow measurement of any liquid throughout a wide range of flow rates and viscosities. Gas content and enclosed particles can be managed. The non-intrusive, contact-free design also ensures that the device can be used with extremely cold or very hot liquids as well as aggressive or toxic media.

A pump jack


Since our insonification technology uses different ultrasonic wave-lengths and frequencies, it can measure several medium parameters. Possible applications range from water cut measurement to multiphase flow metering (oil, water, gas) and wet gas.

The ROSEN retrofittable (clamp-on) multiphase flowmeter can be installed directly at each well-head for real-time production rate measurement. This offers the opportunity for oil field production optimization and reservoir monitoring.

The ROSEN flowmeter flowhall where the ultrasonic flowmeter technology is produced

Test Facility

Internal Multiphase Research & Development Facility

In 2014, ROSEN commissioned the construction of a multiphase flow loop facility for developing, engineering and testing its EMAT-Flowmeters. In this flow loop, the EMAT Flowmeter measures single phase media such as water, nitrogen and diesel, as well as water cut and multiphase flows.

ROSEN uses this facility at the Rosen Technology & Research Center in Lingen, Germany, to develop complex single and multiphase solutions in close cooperation with our customers.



Insonification with broadband ultrasonic waves

Installation advantages

  • Clamp-on system w/o any pipe preparation nor process interruption
  • Quick installation with auto-alignment, auto-setting
  • Modular sensor design

Operation advantages

  • Non-intrusive
  • No pressure loss
  • No wetted parts
  • No wear and tear

Performance advantages

  • High accuracy
  • High temperature capability
  • Low gas pressure capabilities
  • Unaffected by bubbles, solid particles
  • Pipelines with inner coating
  • High flow velocity measurements (gas, steam)
The ROSEN RTRC in Lingen (Ems) aerial shot by drone

About the ROSEN Group

ROSEN is a leading privately owned company that was established as a one-man business in 1981. Over the last 30 years, ROSEN has grown rapidly and is today a worldwide technology group that operates in more than 120 countries with over 3,000 employees.

The ROSEN Group is a worldwide provider of cutting-edge solutions in all areas of the integrity process chain suiting a wide range of industries: oil and gas, energy, process, mining, manufacturing, telecommunications and transportation for a wide range of assets, including pipeline, tanks and vessels as well as wind turbines, trains, telecommunication towers and many more.

industrial pipes in refineries


Please contact us and we will be happy to provide you with more information.

Thomas Middrup
ROSEN Germany GmbH
Am Seitenkanal 8
49811 Lingen (Ems) · Germany

Phone +49-591-9136-7329