LDC Series | Non-Nucleonic
Intelligent Slurry Density Meter (LDC Series)
John Finlay’s high-precision, non-nucleonic online slurry density meter for continuous real-time slurry density measurement in coal washery, mineral processing, flotation circuits, and tailings pipelines. Maintenance-free design, radiation-free operation, and seamless integration with existing plant control systems.
Non-Nuclear
Radiation-Free
Product Overview
Intelligent Slurry Density Meter (LDC Series)
Advanced non-nuclear, high-precision density monitoring designed for continuous online slurry density measurement across mineral processing and coal beneficiation plants.
The John Finlay LDC Series Intelligent Slurry Density Meter is an advanced non-nucleonic, maintenance-free system engineered for continuous online slurry density measurement across a broad range of industrial mineral processing applications. Built with high-chromium alloy wear-resistant bimetallic pipes, the LDC offers significantly extended service life compared to conventional pipeline systems, without the regulatory burden, safety risks, or operational complexity of nuclear-based density meters.
Designed for process engineers and plant operators in coal washing plants, mineral beneficiation facilities, and tailings management operations, the LDC Series delivers real-time slurry density data directly to existing plant control systems via 4–20mA and Modbus-RTU communication interfaces. Compatible with both pressure pipelines and partially filled self-flowing pipelines, the LDC integrates seamlessly into established process environments with minimal installation disruption.
For iron ore and magnetite operations requiring online iron grade measurement, John Finlay also supplies the LIG Series Non-Nucleonic Iron Grade Slurry Analyzer, a complementary instrument for accurate, radiation-free iron content monitoring in beneficiation circuits.
Why Operators Choose the LDC Series
Technology
Non-Nucleonic Slurry Density Measurement Technology
The LDC Series uses advanced non-nuclear measurement principles to deliver industrial-grade slurry density measurement accuracy with none of the regulatory or safety overhead of radiometric instruments.
Durable Bimetallic Construction
Constructed using high-chromium alloy wear-resistant bimetallic pipes, providing extended service life versus conventional pipeline systems, particularly valuable in abrasive slurry environments.
Maintenance-Free Sensor Core
No internal moving parts. The sensor core remains fully isolated from direct slurry contact, eliminating wear-related failures and supporting remote debugging without requiring on-site intervention.
Versatile Pipeline Compatibility
Compatible with both pressure pipelines and partially filled self-flowing pipelines. Pipe replacement installation method ensures rapid deployment and minimal process disruption.
High-Precision Real-Time Output
Automated real-time adjustments based on flow rate, density, and temperature deliver consistent, accurate slurry density readings suitable for closed-loop process control applications.
Radiation-Free Operation
Fully non-nuclear instrument. No Cs137 or any radioactive elements are used, making it safe, environmentally sustainable, and significantly easier to operate than nuclear-grade density analyzers.
PLC / SCADA Integration
Real-time data output via 4–20mA analog and Modbus-RTU digital communication interfaces, with local display and optional integration with the plant's PLC or DCS for automated process control.
Iron Grade Measurement
Key Features of the LIG Non-Nucleonic Iron Grade Slurry Analyser
For magnetite and iron ore processing operations, the LIG Series provides continuous online iron grade measurement alongside pipeline slurry density measurement, without radiation.
Minimal Maintenance, Remote Debugging
Requires only occasional oiling and minor upkeep. Remote expert debugging mode is available for convenient, low-intervention operation in remote or unmanned process locations.
Low Grade Alarm and Automatic Reporting
Automatically detects when iron grade falls below the set threshold and generates detailed data reports, enabling rapid process intervention and quality control.
High Adaptability, Easy Installation
Easily integrates with beneficiation equipment or systems and is compatible with all slurry pipelines and process nodes, minimizing engineering costs during installation.
High Integration, Accurate Measurement
Uses lightning-fast processors and intelligent chipsets for reliable and precise iron grade readings, suitable for real-time, closed-loop iron grade control in beneficiation circuits.
Intuitive Display, Simple Calibration
Touchscreen display with historical data logging. Only a one-time calibration is required during setup, reducing commissioning time and ongoing operator burden.
Non-Nuclear, Cost-Effective Instrument
Safe and environmentally friendly, no Cs137 or radiation involved. Easier and cheaper to operate compared to nuclear-grade analyser alternatives.
Operating Principle
How the Intelligent Slurry Density Meter Works
The LDC Series uses non-nuclear physical measurement principles to continuously calculate slurry density, concentration, and temperature in real time, without radioactive sources.
Industry Applications
Applications in Mining and Mineral Processing
The LDC Series online slurry density meter is widely applicable for slurry density monitoring across ferrous, non-ferrous, and coal processing industries.
Flotation Circuits
Inline slurry density meter for flotation feed, froth, and tailings monitoring, enabling stable flotation conditions and optimized reagent dosing in coal and mineral flotation plants.
Coal Washery
Accurate real-time slurry density measurement in coal washing plant circuits, supporting dense medium control and improving separation efficiency and clean coal yield.
Thickener Feed
Continuous slurry density measurement at the thickener underflow outlet and feed pipe, supporting optimal flocculant dosing and consistent thickener underflow density control.
Tailings Pipeline
Real-time slurry density monitoring in tailings transport pipelines, ensuring safe and efficient slurry pumping while preventing pipeline blockages and pump cavitation.
Ferrous & Non-Ferrous Metal Mines
Applicable across a wide range of ore processing applications, including magnetite, hematite, copper, zinc, and lead mineral processing facilities.
Thermal Power Plants
Online slurry density measurement for fly ash and slurry transport monitoring in thermal power plant ash handling and slurry disposal systems
Coal Beneficiation Plants
Continuous monitoring of coal slurry density across beneficiation plant processes including heavy medium circuits, classification, and product dewatering stages.
Cyclone Feed Monitoring
Installed at cyclone feed inlets to monitor and control slurry density entering classification equipment, improving cut point accuracy and reducing misplacement of fine particles.
Competitive Advantage
Advantages Over Nuclear Density Meters
The LDC Series non-nucleonic slurry density measurement system eliminates the significant regulatory, safety, and operational burdens associated with traditional nuclear density meters.
Non-Nucleonic Slurry Density Meter
LDC SeriesConventional Nuclear Density Meter
Reduced Reagent Consumption
Accurate real-time density data enables tighter control of reagent and flocculant dosing in flotation and thickener circuits, directly reducing consumable costs.
Improved Process Stability
Continuous inline slurry density measurement enables faster process response and more stable operating conditions across the beneficiation circuit.
Environmental Sustainability
Non-nuclear technology is compliant with environmental and workplace health standards, supporting sustainable plant operations and corporate ESG commitments.
Superior Precision at Range
Automated real-time corrections based on flow rate, temperature, and density ensure consistent measurement accuracy of ±2% across the full operating range.
Installation & Integration
Installation and Integration
The LDC Series is designed for straightforward pipe-replacement installation with minimal plant downtime and is compatible with existing plant control infrastructure.
Cyclone feed inlet pipeline
Magnetic separator feed pipe
Thickener underflow outlet
Other closed pipelines (including certain open pipeline scenarios)
Flotation feed and tailings pipelines
Dense medium return and feed circuits in coal washing plants
Technical Data
Technical Specifications
All parameters are sourced directly from manufacturer technical documentation. Contact John Finlay for project-specific configuration and sizing advice.
LDC Series — Intelligent Slurry Density Meter
| Parameter | LDC Series Specification | Unit |
|---|---|---|
| Power Supply Voltage | AC220 | V |
| Ambient Temperature | -5 to 50 | °C |
| Slurry Concentration Range | 5–85 | wt% |
| Slurry Density Range | 0–4000 | kg/m³ |
| Accuracy | Error ≤ ±2% | — |
| Communication Interface | 4–20mA and Modbus-RTU | — |
| Pipe Specifications | 100 / 150 / 200 / 250 / 300 / 350 | mm |
| Flange Standard | GB/T9116.1-2000 | — |
| Installation Method | Pipe Replacement | — |
| Control Box Size | 500 × 390 × 220 | mm |
| Control Box Weight | 10 | kg |
| Host Size | Height 1200 | mm |
| Host Weight | 110 / 140 / 190 / 230 / 270 / 320 | kg |
LIG Series — Non-Nucleonic Iron Grade Slurry Analyser
| Item | LIG-100A (Pipe Type) | LIG-100B (Probe Type) | Unit |
|---|---|---|---|
| Power Supply Voltage | AC220 | AC380 | V |
| Precision | Error ≤ ±1% | Error ≤ ±1% | — |
| Ambient Temperature | -5 to 60 | -5 to 60 | °C |
| Communication Method | 4–20mA, Modbus-RTU, Modbus-TCP/IP | — | |
| Slurry Concentration Range | 0–72 | 0–72 | wt% |
| Control Box Dimensions | 500 × 390 × 220 | None | mm |
| Control Box Weight | 10 | None | kg |
| Host Dimensions | 340 × 540 × 1500 | 1250 × 1000 × 2100 | mm |
| Host Weight | 180 | 800 | kg |
Working Principle
Magnetic Susceptibility Measurement (LIG Series)
The LIG Series measures how materials respond to magnetic fields to calculate iron content, distinguishing between ore types without radiation.
Magnetic Susceptibility Measurement
The LIG Series measures how materials respond to magnetic fields to calculate iron content, distinguishing between ore types such as magnetite, roasted ore, and vanadium-titanium magnetite.
Accurate Grade Calculation
Accurate grade calculation with no radioactive elements involved, making the LIG a fully compliant instrument for use in all processing environments, including environmentally regulated sites.
Applications
Suited to single magnetite and magnetite-hematite ores, vanadium-titanium magnetite, roasted or polymetallic ores, and iron ore beneficiation grinding circuits, flotation tailing lines, and classification circuits.
Ideal Use Environments
Ideal for use in non-nuclear environments where safety, sustainability, and reliable real-time iron grade control are required, including remote mines, processing plants near populated areas, and export facilities.
About John Finlay
Slurry Density Meter Supplier
Why John Finlay?
John Finlay Engineering & Tech Group of Companies is an established slurry density meter manufacturer and supplier serving coal beneficiation, mineral processing, and tailings management operations. With deep expertise in non-nuclear density measurement technology, John Finlay provides engineering consultation, equipment supply, installation support, and ongoing technical service for LDC and LIG Series instruments across Australia and international markets.
As a specialist industrial slurry density meter supplier, John Finlay works directly with plant operators, process engineers, and project managers to select the correct LDC Series configuration for each application, ensuring accurate, reliable slurry density measurement from day one of commissioning.
Slurry Density Meter | Frequently Asked Questions
Common questions from plant engineers, maintenance managers, and procurement teams about slurry density meter for coal washery and mineral processing.