Particle element
Non-nuclear slurry density meter

Introducing the Ultrasonic Slurry Density Meter (SDM)

The all-new and non-nuclear slurry density meter which uses HART technology for improved communication.

The SDM is Non-nuclear Durable Water and dust-proof Accurate

The SDM uses new sensor technologies including

The unique ceramic material on the sensor tip gives the probe better ultrasonic properties resulting in a stronger and more intense signal. Built to last in even the toughest applications such as mining and dredging.
Compact design
Lightweight and modular, the SDM consists of three parts which are all mounted directly on the pipe. No cables between the electronics and the sensor means it is easy to install and maintain.
Ease of use
All the SDM needs is a single point calibration. The simple user interface makes this easy or the SDM can be controlled remotely via a HART communication protocol.
SDM Video

Density measurement

The SDM is lightweight, needs no supports and suffers no effects from vibrations. With the IP68 housing, the SDM is well protected against water and dust making it ideal for quarries, mining and dredging applications. Find out more about the SDM and its installation in this video.


Features of all Rhosonics ultrasonic analysers.

In-process control whether measuring density with the SDM or liquid concentration with any of the other Rhosonics ultrasonic analysers. All use the power of ultrasonic wave velocity to measure liquids and slurries.

No moving parts

No consumables

Calibrated at manufacture

Ultra low maintenance

Unique sensor design

Ultrasonic measurement

Ultrasonic Technology to measure liquid concentrations

Our state of the art sensors are designed for mounting directly in the pipe line, in a tank or in a by-pass stream in case of small volumes. Capable of measuring a range of industrial chemicals in solution including acids, bases, COD, metals and more.

Particle element

Realtime process control from ultrasonic analysers.

Ultrasonic measurement technology outperforms traditional methods of analysis. Quicker, more durable, lower maintenance and inline.

8500 Series

8500 Series

For acids and bases including H2SO4, NaOH and more...

9100 Series

9100 Series

For beer and wort analysis.

9500 Series

9500 Series

For online COD measurement in food and brewing applications

9600 Series

9600 Series

For online density and TSS measurement in slurries

SDM Series

SDM Series

Non-nuclear Slurry density analyers.

View the whole range.

Not sure which product is right for you – find out more by downloading the Rhosonics company brochure.

Download brochure

Realtime data which can adjust the chemicals immediately.

Aqueous solutions
Measurement of aqueous solutions, i.e. dissolved solids like: chemicals, acids, alkalines, alcohol, salts, oils.
Food and beverage
Food & Beverages, like dairy, beer, dough, juices, alcohol, acids.
Continuous measurement
Ternary liquids, simultaneous continuous measurement of mixed chemicals, i.e. electrolytes, pickling acids and other acid & salt mixtures.
Slurry density measurement
Slurries – Suspended Solids measurement, simultaneous TSS, TDS and density analysis in slurries.

The SDM, Slurry Density Meter

This SDM which is new to our product line and is highly suitable for density analysis in many kinds of slurries.

Find out more

Winner of the mining excellence award.

Typical applications include: Concentrated Acid/Alkali, Glycols in water, Mining slurries, Electroplating, Brewing, Paper mills – send us an enquiry for your application.

Expert Support
Whether you need a call back or have a highly technical question to ask, our expert staff are always on hand.
Our focus has always been to deliver world-class customer service.