LONN7000 insert ultrasonic density & concentration meter for real-time slurry monitoring. Non-nuclear acoustic impedance, 4-20mA/RS485. For mining.
The LONN7000 insert ultrasonic density & concentration meter delivers real-time slurry density and solids measurement for mining, mineral processing, and chemical applications—without radioactive sources. This non-nuclear instrument uses advanced acoustic impedance technology to monitor ore pulp, tailings, and process slurries directly in pipelines, delivering continuous density and concentration data for process optimization and quality control.
Designed for hazardous industrial environments, the LONN7000 features robust explosion-proof housing and flange-mounted insertion probe that withstands abrasive slurries and corrosive media. The integrated microprocessor converts acoustic impedance signals to both density (g/cm³) and concentration (%) values with automatic temperature compensation, ensuring stable readings across varying process conditions.
With dual 4-20mA and RS485 Modbus RTU outputs, the LONN7000 integrates seamlessly into SCADA systems, DCS platforms, and PLC networks for automated process control, trending, and reporting.
Traditional nuclear density gauges require radioactive sources, creating regulatory burdens, safety risks, and disposal headaches. The LONN7000 uses ultrasonic acoustic impedance technology—completely radiation-free. No licensing, no shielding, no environmental compliance costs. Safer for personnel, simpler for operations.
The insertion probe mounts directly into process pipelines via standard flange connection, placing the sensor in the full flow stream for representative measurement. No bypass lines, no sampling delays, no laboratory bottlenecks. Solids content data updates continuously for immediate process response.
Mining and mineral processing slurries are tough on equipment. The LONN7000 probe features hardened sensor surfaces and corrosion-resistant wetted materials (316L stainless steel standard; Hastelloy or ceramic options available). The streamlined probe geometry minimizes wear and prevents material buildup.
Simultaneous 4-20mA analog output and RS485 Modbus RTU digital communication provide flexible connectivity. Connect to existing DCS systems, standalone controllers, or data loggers. Configure measurement ranges, damping, and alarm thresholds via onboard menu or remote communication.
| Specification | Value |
|---|---|
| Measurement Principle | Ultrasonic acoustic impedance |
| Solids Range | 0–100% by weight |
| Density Range | 0.5–3.0 g/cm³ |
| Accuracy | ±1% of reading |
| Repeatability | ±0.5% |
| Temperature Range | -20°C to +80°C (process); -20°C to +60°C (ambient) |
| Pressure Rating | ≤ 2.5 MPa (standard); higher on request |
| Process Connection | Flange DN50, DN80, DN100, DN150, DN200 (ANSI/DIN/JIS) |
| Insertion Length | 200–1000 mm (customizable to pipe diameter) |
| Wetted Materials | 316L SS (standard); Hastelloy C, ceramic (optional) |
| Output Signal | 4–20mA (active/passive) + RS485 Modbus RTU |
| Display | LCD: Solids % / Density / Temperature / Acoustic parameters |
| Power Supply | 24V DC (±10%) or AC220V |
| Protection Class | IP65 (electronics); IP68 (probe, optional) |
| Explosion Protection | Ex d IIC T6 (ATEX/IECEx/CNEX optional) |
| Cable Entry | M20×1.5 or NPT3/4″ |
| Data Storage | 20,000 real-time records + 400 daily records |
Monitor ore pulp solids in grinding circuits, flotation feed, and thickener underflow. Optimize water addition, control grinding efficiency, and maximize metal recovery with continuous density feedback.
Measure coal slurry density in heavy media separation circuits, flotation cells, and tailings lines. Ensure consistent product quality and efficient water recovery.
Track concentrate density in copper, zinc, lead, and iron ore processing. Control thickener performance and tailings disposal with reliable inline measurement.
Monitor phosphate, potash, and chemical slurry solids. The non-nuclear design eliminates regulatory concerns while providing accurate process control.
Measure slurry density and concentration in cement production, kaolin processing, and construction material manufacturing. Robust construction withstands abrasive particulate media.
The LONN7000 installs directly into process pipelines via flange connection. For optimal performance:
The LONN7000 operates on acoustic impedance principles. An ultrasonic transducer emits sound pulses into the slurry; the sensor measures how the medium attenuates and reflects the acoustic energy. Since acoustic impedance varies with solids concentration, the instrument correlates received signal characteristics to slurry density and concentration.
Key advantages over other technologies:
Q: What is the difference between ultrasonic acoustic impedance and nuclear density gauges?
A: Nuclear density gauges require radioactive sources (Cs-137, Am-241), creating regulatory burdens, safety risks, and disposal headaches. The LONN7000 uses ultrasonic acoustic impedance technology—completely radiation-free. No licensing, no shielding, no environmental compliance costs. For mining and mineral processing plants, this eliminates the need for radiological safety officers, annual inspections, and source replacement contracts.
Q: Can the LONN7000 measure both density and concentration simultaneously?
A: Yes. The LONN7000 outputs both density (g/cm³) and solids concentration (%) values simultaneously. Density is derived from acoustic impedance, while concentration is calculated based on the mass difference between solids and liquid phase. Both values update in real-time and can be output via 4-20mA or Modbus RTU.
Q: What is the maximum insertion length available for the LONN7000?
A: Standard insertion lengths range from 200mm to 1000mm. Custom lengths up to 2000mm are available upon request for large-diameter pipes or special installations. The insertion length should be selected based on pipe diameter—typically 0.3×DN to 0.5×DN for optimal measurement representation.
Q: Is the insertion probe suitable for abrasive slurries like iron ore or copper concentrate?
A: Yes. The LONN7000 probe features hardened sensor surfaces and corrosion-resistant wetted materials. For highly abrasive applications, we recommend the LONN7000-D ceramic probe version which uses alumina ceramic sensor surfaces for maximum wear resistance. The streamlined probe geometry also minimizes wear and prevents material buildup.
Q: Can the LONN7000 be installed in existing pipelines without process shutdown?
A: The standard LONN7000 requires process shutdown for installation since it mounts via flange connection. However, for retrofitting without shutdown, we offer a hot-tap installation option (custom engineering) where a full-port isolation valve is installed first, then the probe is inserted under pressure. Contact our application engineering team for feasibility assessment.
Q: What hazardous area certifications are available for the LONN7000?
A: The LONN7000 is certified for Zone 1 hazardous locations with the following approvals (varies by configuration):
For Zone 0 applications, please contact our hazardous area specialist team for intrinsically safe (Ex ia) configuration options.
Q: How does the LONN7000 handle entrained air or gas bubbles in the slurry?
A: Unlike nuclear gauges which are affected by air gaps, the LONN7000 is bubble-tolerant. The acoustic impedance measurement is based on the bulk properties of the medium. Small amounts of entrained air (typically <5% by volume) have minimal impact on accuracy. For applications with excessive aeration, we recommend installing a degassing vessel upstream or using our signal filtering algorithms.
Ready to configure your LONN7000? Fill out our RFQ form or email anna@xalonn.com with the following details:
As a specialized ultrasonic density meter manufacturer with direct-from-factory pricing, LONNMETER provides complimentary application engineering support to ensure optimal model selection for your specific installation constraints. We don’t just sell instruments — we partner with your engineering team to deliver reliable measurement solutions.
LONNMETER is a trusted manufacturer of industrial density and concentration measurement instruments, serving the mining, mineral processing, chemical, and power generation sectors. With ISO9001 certification and global export to 130+ countries, LONNMETER delivers accurate, reliable, and safety-certified inline instruments for process-critical applications.
Please provide your application parameters for a technical assessment and formal quote.