Measuring density is essential for various applications, with reasons that may vary per application. Proper process control is crucial, as mismanagement can result in additional costs and adversely affect profitability and sustainability.

Radiation-based measuring devices have traditionally been used to measure density in the mineral processing industry. However, with stricter government regulations, more nuclear meters are being replaced by alternatives. These alternatives can perform the same job without any administration costs or health and safety risks associated with nuclear sources.

The SDM eliminates all costs and health and safety risks associated with radiation sources. Additionally, the device is user-friendly, does not require a license, and provides reliable values for monitoring and improving production output.


The Slurry Density Meter (SDM) is a non-nuclear product that can measure the density of all types of slurries in real-time. It utilizes sustainable ultrasonic technology and is specifically tailored for use in dredging and mineral processing applications. Moreover, the SDM employs a non-intrusive ultrasonic sensor to measure the real-time density of mineral slurries even under high-level conditions and within huge pipes.

On November 2nd, 2023, Rhosonics released the latest version of the SDM, the SDM ECO. The SDM ECO is an upgrade of the SDM-4 in terms of accuracy, response time, operating temperature range, and sensor design. In addition to that, the SDM ECO can be controlled by a 7’’ touchscreen display, laptop, via optional Wi-Fi, or from anywhere with server access.

SDM ECO Transmitter

Get in touch with Rhosonics for further information about chemical concentration or density control. If you want to learn more about our applications, then please also check our client cases and webinars.

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