LONN7001 tee ultrasonic density & concentration meter with flange DN25 connection. Non-nuclear acoustic impedance, 4-20mA/RS485. For chemical & petrochemical inline monitoring.
The LONN7001 tee ultrasonic density & concentration meter delivers inline real-time measurement for chemical processing, petrochemical refining, pharmaceutical production, and food & beverage applications—without radioactive sources. This compact, flange-mounted instrument uses advanced ultrasonic acoustic impedance technology to monitor process fluid characteristics directly in pipelines through a standard tee-junction installation.
Designed for space-constrained installations, the LONN7001 features an integrated tee-body design that replaces conventional spool-piece or insertion-style instruments. The streamlined flow path minimizes pressure drop while ensuring representative sampling of the process fluid. With dual 4-20mA analog output and RS485 Modbus RTU digital communication, the LONN7001 integrates seamlessly into DCS systems, PLC networks, and SCADA platforms for automated process control.
The LONN7001 is engineered for corrosive and aggressive media commonly found in chemical plants and refineries. Wetted materials include 316L stainless steel as standard, with Hastelloy C, titanium alloy, or zirconium options for highly corrosive applications. The robust IP65-rated electronics housing withstands harsh industrial environments, while optional Ex d IIC T6 explosion-proof certification enables deployment in Zone 1 hazardous areas.
With automatic temperature compensation and built-in signal conditioning, the LONN7001 delivers stable, accurate readings across varying process conditions—from cryogenic temperatures up to +150°C—making it a versatile solution for inline monitoring across multiple industries.
Unlike bulky spool-piece instruments that require long straight-run piping modifications, the LONN7001 installs directly into a standard tee junction on existing pipelines. No additional straight-run length needed—just cut, weld or flange-mount the tee body, and you’re measuring. Ideal for retrofit projects and space-constrained skids where every inch matters.
Traditional nuclear density gauges rely on radioactive isotopes (Cs-137, Co-60), creating licensing requirements, radiological safety programs, and costly source disposal. This instrument uses ultrasonic acoustic impedance technology—zero radiation, zero regulatory burden. No shielding, no annual inspections, no specialized handling. Safer for operators, simpler for compliance departments, and environmentally responsible from day one.
From cryogenic liquid storage (-25°C) to high-temperature refining processes (+150°C), the LONN7001 handles extreme thermal conditions without accuracy degradation. The integrated temperature compensation algorithm continuously corrects density readings for thermal expansion effects, delivering laboratory-grade accuracy in real industrial environments.
Chemical plants deal with acids, alkalis, solvents, and corrosive intermediates daily. The LONN7001 offers wetted material options including 316L stainless steel (standard), Hastelloy C (for chlorides and oxidizing acids), titanium alloy (for chloride-rich media), and zirconium (for highly aggressive alkaline solutions). Match the right material to your process chemistry for maximum service life.
Simultaneous 4-20mA analog channels (configurable for density, concentration, or temperature) plus RS485 Modbus RTU digital communication provide flexible connectivity to any control system. Configure ranges, damping coefficients, filter settings, and alarm thresholds via the onboard display menu or remotely through Modbus registers—no proprietary software required.
| Specification | Value |
|---|---|
| Measurement Principle | Ultrasonic acoustic impedance |
| Density Range | 0.5–3.0 g/cm³ (customizable) |
| Concentration Range | 0–100% by weight (customizable) |
| Accuracy | ±1% of reading |
| Repeatability | ±0.5% of reading |
| Temperature Range (Process) | -25°C to +150°C (standard); higher on request |
| Temperature Range (Ambient) | -40°C to +70°C |
| Pressure Rating | ≤ 4.0 MPa (standard); higher on request |
| Process Connection | Flange DN25 (ANSI Class 150/300, DIN PN16/40, JIS) |
| Installation Type | Tee-junction inline (flange-mounted) |
| Wetted Materials | 316L SS (standard); Hastelloy C, Ti alloy, Zr (optional) |
| Output Signal | 4–20mA (2-channel, active/passive) + RS485 Modbus RTU |
| Display | LCD: Density / Concentration / Temperature / Acoustic velocity / mV output |
| Power Supply | 24V DC (±10%) or AC220V (±10%) |
| Protection Class | IP65 (electronics); IP67 (sensor body) |
| Explosion Protection | Ex d IIC T6 (ATEX/IECEx/CNEX optional) |
| Cable Entry | M20×1.5 or NPT½″ |
| Data Storage | 20,000 real-time records + 400 daily records |
| Response Time | ≤ 1 second |
| Max Medium Viscosity | 2000 mPa·s |
Monitor acid concentration (sulfuric, hydrochloric, nitric), caustic strength (NaOH, KOH), solvent ratios (methanol, ethanol, glycerol), and intermediate reaction densities in real time. The LONN7001’s corrosion-resistant wetted materials handle aggressive chemicals while providing continuous feedback for feed-forward control and quality assurance.
Track hydrocarbon density for product blending, interface detection in pipelines, and catalyst slurry concentration monitoring. The wide temperature range accommodates both ambient storage conditions and high-temperature reactor effluent streams. Non-nuclear operation eliminates radiation safety concerns in refinery environments.
Ensure precise concentration control for API solutions, solvent recovery processes, alcohol distillation, and purified water system monitoring. The 316L stainless steel wetted path meets pharmaceutical cleanliness standards (optional electropolished finish available), while the compact tee design fits cleanly into sanitary piping layouts.
Measure sugar concentration (Brix), juice density, dairy product consistency, and brewing wort specific gravity inline. The smooth internal flow path prevents product holdup and enables Clean-in-Place (CIP) compatibility. Food-grade material options available upon request.
Monitor electrolyte density and concentration in lithium-ion battery production lines—sulfuric acid-based electrolyte preparation, lithium hydroxide solution mixing, and electrolyte filling stations. Real-time density feedback ensures consistent cell performance and reduces scrap rates.
Track desulfurization slurry density (limestone/gypsum slurry), denitrification reagent concentration (ammonia/urea), and MVR evaporator concentrate density. The non-nuclear design simplifies environmental permitting and eliminates radioactive waste disposal concerns.
The LONN7001 installs via standard flanged tee connection on process pipelines:
Tee Installation Advantage: Unlike spool-piece meters requiring 10-15 DN of straight run, the LONN7001’s integrated tee-body design needs minimal upstream/downstream space—critical for retrofitting into existing crowded pipe racks and modular skid systems.
The LONN7001 operates on ultrasonic acoustic impedance principles. An ultrasonic transducer embedded in the tee-body wall emits high-frequency sound pulses into the flowing process fluid. The receiver measures how much acoustic energy is reflected and attenuated at the fluid-transducer interface. Since acoustic impedance (Z = ρ × c, where ρ is density and c is sound velocity) varies predictably with fluid density and solids concentration, the microprocessor correlates received signal characteristics to produce accurate density and concentration values.
Key advantages over competing technologies:
| Model Code | Description |
|---|---|
| LONN7001-A | Standard tee ultrasonic density meter, flange DN25, 316L wetted parts |
| LONN7001-B | High-pressure version (up to 6.4 MPa) |
| LONN7001-C | Explosion-proof version, Ex d IIC T6 certified (ATEX/IECEx/CNEX) |
| LONN7001-D | Hastelloy C wetted parts (for highly corrosive media) |
| LONN7001-E | Titanium alloy wetted parts (chloride-resistant) |
| LONN7001-F | Zirconium wetted parts (alkaline/strong base resistance) |
| LONN7001-G | Extended temperature range (up to +200°C process) |
Contact for Pricing & Technical Support: anna@xalonn.com
Q: What is the difference between the LONN7001 tee type and the LONN7000 insert type?
A: The LONN7001 features an integrated tee-body flange design (DN25 standard) that mounts directly onto a tee junction in your pipeline—ideal for space-constrained installations, retrofits, and smaller pipe sizes. The LONN7000 uses an insertion probe mounted through a flange on larger pipes (DN50–DN200), designed for mining slurries and high-solids applications. Both use ultrasonic acoustic impedance technology, but the physical installation method differs based on pipe size, available space, and application requirements.
Q: Can the LONN7001 measure both density and concentration simultaneously?
A: Yes. The LONN7001 outputs both density (g/cm³) and concentration (% by weight) values simultaneously via dual 4-20mA channels and RS485 Modbus RTU. Density is derived from acoustic impedance measurements, while concentration is calculated based on user-configured reference densities for the solid and liquid phases. Both values update in real-time with automatic temperature compensation applied.
Q: What pipe sizes does the LONN7001 support?
A: The standard LONN7001 is configured for DN25 (1-inch) flange connection. For larger pipe sizes (DN40, DN50, DN80), we offer custom tee-body configurations with matching flange ratings (ANSI Class 150/300, DIN PN16/40). Contact our engineering team with your specific pipe size and pressure rating requirements for a tailored configuration.
Q: Is the LONN7001 suitable for corrosive chemicals like sulfuric acid or sodium hydroxide?
A: Yes—with proper wetted material selection. The standard 316L stainless steel handles mild corrosives (dilute acids, alkalies, most organics). For concentrated sulfuric acid, we recommend Hastelloy C wetted parts. For hot concentrated NaOH or other strong alkaline solutions, zirconium provides superior resistance. For chloride-containing media (seawater brines, HCl environments), titanium alloy is the optimal choice. Our application engineers will help match materials to your specific process chemistry.
Q: What hazardous area certifications are available for the LONN7001?
A: The LONN7001 is available with Zone 1 explosion-proof certification (configuration LONN7001-C):
For Zone 0 applications (intrinsically safe requirement), contact our hazardous area specialists for Ex ia configuration assessment.
Q: How does the LONN7001 handle entrained air or gas bubbles in the process fluid?
A: The acoustic impedance measurement principle used by the LONN7001 is inherently more tolerant to entrained air than nuclear transmission gauges, which suffer significant errors from gas gaps. Small amounts of entrained air (typically <3% by volume) have minimal impact on measurement accuracy. For applications with higher aeration levels, we recommend installing a deaeration vessel or air separator upstream, or enabling the built-in digital filtering algorithm to smooth transient disturbances.
Q: Can the LONN7001 be installed in existing pipelines without cutting the pipe?
A: The standard LONN7001 requires a tee junction installation, which typically involves cutting the pipe and welding/flanging a tee fitting. However, for hot-tap (under-pressure) installation without process shutdown, we offer a custom-engineered solution using a full-port isolation valve assembly. This allows the LONN7001 to be inserted and removed under full operating pressure. Contact our application team for feasibility evaluation and quotation.
Q: What is the calibration interval and maintenance requirement for the LONN7001?
A: The LONN7001 is designed for minimal maintenance—there are no moving parts in the sensing element. Recommended calibration interval is 12 months under normal operating conditions, using certified density reference fluids (distilled water, calibrated density standards). Field calibration can be performed via the onboard display menu without disassembly. The only routine maintenance is periodic visual inspection of the sensor window (clean if fouling observed) and verification of electrical connections.
Ready to configure your LONN7001? 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 and material compatibility for your specific process conditions. We don’t just sell instruments — we partner with your engineering team to deliver reliable, long-term measurement solutions.
LONNMETER is a trusted manufacturer of industrial density and concentration measurement instruments, serving the mining, mineral processing, chemical, petrochemical, pharmaceutical, food & beverage, battery manufacturing, and environmental sectors. With ISO9001 certification and global export to 130+ countries, LONNMETER delivers accurate, reliable, and safety-certified inline instruments for process-critical applications.
Contact LONNMETER: anna@xalonn.com
Please provide your application parameters for a technical assessment and formal quote.