Non-nuclear slurry density meter

Rhosonics Ultrasonic Density and Concentration Analysers

PMA supplies and supports Rhosonics ultrasonic analysers for continuous, real-time measurement of slurry density and liquid concentration. Explore non-nuclear instruments for mining, dredging, cement, chemical processing, brewing and wastewater applications.

Industrial SDM ECO measurement device with touchscreen display, circular keypad, and a connected green/black sensor probe

The SDM is Non-nuclear

The SDM ECO uses new sensor technologies including

Ideal for various setups, including half-filled pipes.

Real-Time Monitoring
The SDM ECO delivers instant, accurate density readings, essential for efficient process control.
Durable Design
With abrasion-resistant sensors, the SDM ECO thrives in rough industrial environments.
User-Friendly Interface
Featuring a 7-inch touchscreen, the device is exceptionally easy to operate.
Safe and Sustainable
Utilizing non-nuclear technology, it ensures safety and environmental compliance.

Rhosonics measurement for every process challenge

From non-nuclear slurry density monitoring to liquid concentration and ternary analysis, PMA helps you specify the right Rhosonics instrument for your process.

Engineering knowledge centre

Technical guides for slurry density measurement

Use these practical guides to compare technologies, plan an SDM ECO installation and identify the right measurement points for mining or dredging applications.

Nuclear or non-nuclear?

Compare measurement principles, UK radiation duties, installation and evidence.

Open selection guide

Install and commission

Prepare the fitting, calibration, validation and handover plan.

Open project guide

Mining processes

Map density measurement across grinding, cyclones, thickeners and tailings.

Open mining guide

Dredging duties

Plan continuous density, flow integration and project validation.

Open dredging guide
Process application library

Process application guides and tools

Move from a broad product search to the exact measurement duty: thickener underflow, hydrocyclone feed, tailings or solids calculations.

Thickener underflow

Plan a representative measurement for pumping, filtration or mass-flow context.

Open thickener guide

Hydrocyclone feed

Use density with pressure, flow, ore and classification context.

Open cyclone guide

Tailings monitoring

Separate thickener, filtration and transport-pipeline measurement duties.

Open tailings guide

Solids calculator

Estimate solids by mass and volume, with optional dry-solids throughput.

Use the calculator

Density measurement

A recent deployment at Grupo Mexico’s mining plant has demonstrated the SDM ECO’s robust performance, accurately measuring slurry density in a tailings thickener underflow. The result? Enhanced process optimization in a safer, more sustainable manner.

Download Case Study
Process Measurement and Analysis Ltd industrial measurement specialists

Ultrasonic process measurement, designed for the realities of industry.

Rhosonics analysers use ultrasonic wave velocity to measure slurry density or liquid concentration for continuous in-process control.

No moving parts
Continuous measurement without moving mechanical components.
Explore Applications
No consumables
Routine operation without radioactive sources or consumables.
Compare Technologies
Calibrated at manufacture
Configured and calibrated for the intended process duty.
Plan Installation
Ultra-low maintenance
A simple measurement principle for straightforward upkeep.
Talk to PMA
PMA application team discussing a Rhosonics ultrasonic analyser during a site handover.

Unique sensor design

Measurement matched to the application.

PMA helps define the process objective, select the appropriate Rhosonics analyser and plan installation, commissioning and verification.

View SDM ECO
Ultrasonic measurement

Ultrasonic Technology to measure liquid concentrations

Rhosonics sensors can be configured for direct pipeline, tank or bypass-stream installation, depending on the instrument and process conditions. Capable of measuring a range of industrial chemicals in solution including acids, bases, COD, metals and more.

PMA engineer checking a wall-mounted Rhosonics SDM ECO at a mineral processing facility

Real-time process control from ultrasonic analysers.

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

8500 Series ultrasonic process concentration analyser application.
8500 Series

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

9100 Series beer and wort analyser application.
9100 Series

For beer and wort analysis.

9500 Series ternary liquid analyser application.
9500 Series

For online COD measurement in food and brewing applications

9600 Series ultrasonic slurry analyser application.
9600 Series

For online density and TSS measurement in slurries

SDM ECO non-nuclear ultrasonic slurry density meter.
SDM ECO Series

Non-nuclear slurry density analysers.

View the whole range.

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

Download brochure

Real-time data for immediate process adjustment

Explore how continuous ultrasonic measurement supports aqueous solutions, food and beverage production, mixed-liquid processes and slurry density control.

Bright modern water treatment campus with two engineers and clean process basins

Aqueous solutions

Measure dissolved solids in liquids including chemicals, acids, alkalis, alcohols, salts and oils.

Modern dairy farm processing installation with timber-clad building and cattle beyond

Food and beverage

Monitor dairy, beer, dough, juice, alcohol and other food or beverage processes continuously.

Engineers reviewing an orderly liquid-processing facility with stainless tanks and pipework

Continuous measurement

Track mixed liquids such as electrolytes, pickling acids and other acid-and-salt combinations in real time.

Modern quarry wash plant with a clarifier, enclosed conveyors and engineers

Slurry density measurement

Measure suspended solids, TSS, TDS and density continuously in demanding slurry processes.

The NEW SDM ECO, 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.

SDM ECO mining technology excellence award

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

Find the right application guidance

Explore measurement guidance by industry, or search all 49 application pages by process, material, measurement objective, analyser or location.

Browse application libraries

Start with quarries, dredging, mining, cement, water, chemicals or brewing and food processes.

View all applications

Search the Application Finder

Describe the process, material, duty, analyser or location and narrow the complete library instantly.

Search applications
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.