> Features

The major features and benefits of the SDMs are:

  • Real-time slurry density monitoring
  • Safe technology (non-nuclear)
  • Abrasion-resistant sensors
  • Easy operation and installation
  • Can be used in half-filled pipes


The Rhosonics SDM stands for Slurry Density Meter, which is a category of instruments that allows for measuring the density of slurries in real-time. Additionally, this instrument uses a non-intrusive ultrasonic sensor to measure the real-time density of mineral slurries under high-density levels and at very large pipes. Moreover, the SDMs have a robust design with sensors made of highly abrasion-resistant materials, making them ideal for rough process conditions.

Furthermore, Rhosonics helps dredgers and mineral processing plants to replace nuclear density gauges with ultrasonic technology. Consequently, operators can achieve process optimization in a safer, more reliable, sustainable, and cost-effective way. This is how Rhosonics contributes to a greener and smarter industry.


Mining technology Excellence Award 2020

In 2020, Rhosonics won the ‘Environmental Impact’ category in the Mining Technology Excellence Awards for its non-nuclear density measurement solution, the SDM Slurry Density Meter. As a result, this innovation is helping processing plants around the world operate more sustainably and efficiently.

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Pipe Integration Systems for Slurry Density Meter

The Clamp-in, the newest pipe integration system for the SDM, allows for robust installation in existing pipes within the process, whether they are plastic or metal, or even have internal liners. Moreover, this system’s main feature is the “hot-tap,” enabling removal and re-installation of the SDM inline without the need to stop the process, in addition to being easy to install.

The UWC, a synthetic flange-like ring made of UHPE, is 60 mm thick and can be clamped between two flanges in almost every piping system.

A spool, which can be made of HDPE, steel A106/A105, or other steel grades, is a pipe piece that can be mounted between two flanges. This installation method can be optionally available with a PU liner and other liners upon request. Furthermore, the choice of materials can differ depending on the application. The spool-piece is mainly useful with abrasive applications

The Weldolet, a weld-on metal adapter, can be used for installation in new or existing steel pipes, as it can be welded on the pipe at the installation point of choice.

RCU Remote Control Unit

The newest Rhosonics instruments, like the SDM, come in a compact all-in-one system with an integrated sensor, display, and operation panel. However, these instruments have user interfaces that can sometimes be difficult to reach due to installation in challenging positions. Consequently, the Rhosonics RCU Remote Control Unit is a multifunctional device that can monitor measurement results and change settings in real-time at a safe and convenient location near the process. Furthermore, it also has a communication protocol converter that can convert HART/4…20 mA signals to Modbus RTU or digital Profibus DP signals.

Therefore, those who are interested in the Rhosonics RCU Remote Control Unit can Click here to view the RCU brochure.

Digital communication via HART

The SDM is a HART certified device. As a result, it can communicate digitally with other HART equipment using the analogue 4-20 mA output.

Moreover, the HART protocol enables remote access and control, which includes:

  • Calibration
  • Variable readout
  • Variable ranging
  • And many other features

Contact us for more information

Phone: +31 341 370 073
Email: sales@rhosonics.com

Get in touch with Rhosonics for further information about density control for efficient mineral processing. If you also want to learn more about our applications, then please also check our case studies and webinars.

For more information about Rhosonics or our ultrasonic analyzers, please take a look at our LinkedIn, Instagram, or Twitter page.