Coriolis Flow Meters: The Gold Standard in Mass Flow & Density Precision

Eliminate the “Density Error” in your process. Longvista Coriolis flow meters provide industry-leading ±0.1% accuracy for mass flow and ±0.001g/cm³ density resolution—delivering laboratory-grade precision in the most demanding industrial environments.

When your fluid’s value is high, volumetric measurement is a financial risk. Changes in temperature, pressure, or viscosity can cause traditional meters to “miscount” your product. Longvista’s Coriolis technology solves this by measuring Direct Mass Flow, making it the definitive choice for custody transfer, chemical dosing, and high-viscosity food processing.

The Longvista Engineering Advantage

  • Precision Without Compromise: Our standard units deliver 0.1-grade accuracy with a liquid repeatability error as low as 0.075%. Even in challenging gas applications, the system maintains a stable 0.25% accuracy, with a long-term drift of less than 0.01% per year.

  • Extreme Media Capability: Beyond simple liquids, our sensors are engineered for the “impossible” fluids. We provide stable measurements for:

    • High-Viscosity Media: Up to 10,000 mPa·s (e.g., resins, syrups, polymers).

    • Two-Phase Flows: Reliable data even with a gas content rate of ≤30%.

    • Micro-Flows: DN02 miniature models capable of measuring as little as 50g/h for laboratory and pilot-plant precision.

  • Built for Rugged Environments: With a pressure range spanning from vacuum to 100 MPa and a specialized vibration-suppression algorithm, our meters filter out over 80% of mechanical interference from industrial pumps and machinery.

  • Material Integrity: 316L Stainless Steel comes standard, with Hastelloy C-22 or PEEK options available for pH 0–14 corrosive environments. Connectivity is seamless via Flange, Clamp, or Threaded industrial standards.

Field-Proven Performance: Industry-Specific Solutions

Selecting a Coriolis meter is about more than just accuracy; it is about choosing an instrument that survives your specific process conditions. Based on our global deployments, we have optimized our technology for the following “High-Stakes” sectors:

1. Chemical & Petrochemical Excellence

In reaction control and high-value solvent transfer, precision directly correlates to profit.

  • Reactor Feed Control: Achieve ±0.25% ratio accuracy in complex processes like styrene polymerization.

  • Aggressive Media: Our Hastelloy C276 variants are proven in H₂S (hydrogen sulfide) environments, maintaining zero-point stability for over 18 months of continuous service without drift.

  • Trade Custody: Ensure errors below 0.2% for high-value solvents like epichlorohydrin, eliminating “giveaway” during fiscal billing.

2. Food, Beverage & Pharmaceuticals

Where hygiene meets high-viscosity measurement.

  • Hygienic Design: All wetted parts feature 316L electrolytic polishing, making them fully compatible with SIP (Steam-In-Place) and GMP standards.

  • Vaccine & Sterile Production: Our sanitary models achieve a filling accuracy of ±0.1ml, raising product pass rates to 99.5% in automated vaccine lines.

  • Viscous Ingredients: Precise dosing of chocolate slurries and syrups at ±0.3%—even when viscosity fluctuates due to temperature changes.

3. New Energy & Environmental Engineering

Supporting the transition to green technologies with metrology-grade data.

  • Hydrogen Refueling: Our specialized high-pressure meters deliver 99.97% accuracy for hydrogen fueling stations, meeting the most stringent global standards for fuel cell vehicles.

  • Lithium Battery Production: High-precision electrolyte filling—a critical step where even a micro-drop deviation affects battery life and safety.

  • Wastewater & Pollution Control: Real-time dosing control for flocculants and chemical additives with ±1% precision, reducing reagent waste in industrial treatment plants.

The “Longvista Algorithm”: Defeating Industrial Vibration

The biggest enemy of Coriolis accuracy is mechanical noise. Most sensors struggle when mounted near large pumps or heavy machinery.

  • Active Suppression: Our proprietary vibration-damping algorithm suppresses over 80% of mechanical interference. This allows for stable measurement in “noisy” environments where traditional meters would require expensive external dampening.

  • Two-Phase Flow Handling: While many meters “lock up” when gas enters a liquid line, our system can process gas-liquid mixtures with up to 30% gas content, providing a continuous reading during “slug flow” or tank-emptying cycles.

Technical Selection Matrix

Metric Standard Industrial High-Pressure / Cryogenic
Mass Flow Accuracy ±0.1% (Grade 0.1) ±0.50% (Grade 0.5)
Liquid Repeatability 0.075% 0.25%
Density Resolution ±0.001 g/cm³ ±0.002 g/cm³
Turndown Ratio Up to 50:1 20:1
Temp. Accuracy ±1.0°C or 0.5% of reading ±1.0°C

Digital Integration: The Pulse of the Smart Factory

A Coriolis meter is the most data-rich sensor in your facility. Our transmitters are designed to translate complex vibrations into actionable insights for your DCS, PLC, or SCADA system.

  • Modular Communication: Standard support for HART, Modbus RTU (RS485), and Profibus. This modular architecture ensures that as your plant upgrades to Industry 4.0, your flow instrumentation is already compatible.

  • Health Diagnostics: Beyond flow data, our electronics provide “Tube Health” monitoring. By tracking the resonant frequency and drive gain, the system can alert maintenance teams to internal coating, scaling, or corrosion before it affects your product quality.

  • Totalized Mass & Batching: Integrated high-speed pulse outputs and internal totalizers allow for precise “Start-Stop” control of valves, essential for automated bottling and reactor charging.

Expert Installation Guide: Achieving the 0.075% Repeatability

To maintain Grade 0.15 accuracy in the field, the installation must respect the physics of the Coriolis force. Based on our experience in chemical and pharmaceutical plants, follow these three rules:

1. The “Full Pipe” Requirement

Always install the meter in a location where the pipe remains 100% full. For liquid service, this typically means a “U-trap” configuration or installing on a vertical line with upward flow. This prevents air pockets from “decoupling” the vibration and causing signal loss.

2. Zero-Point Calibration (The Post-Installation Essential)

Every piping system exerts unique mechanical stress on the meter flanges.

  • The Procedure: Once the meter is bolted in and the fluid is at operating temperature/pressure, stop the flow completely (using valves upstream and downstream).

  • The Result: Perform a “Field Zero” to calibrate out any stress-induced offsets. This simple 60-second step is the difference between ±0.15% accuracy and ±1.0% error.

3. Stress-Free Mounting

Avoid using the meter as a support for the piping. Use rigid brackets on both the inlet and outlet sides of the meter. For applications involving high-vibration positive displacement pumps, we recommend using flexible decouplers to isolate the sensor from mechanical noise.

FAQ – Technical Insights for Procurement & Maintenance

Q: Can your Coriolis meter replace a lab-grade densitometer? A: Yes. With a ±0.001 g/cm³ density resolution, our meters provide real-time, inline density measurement that matches laboratory precision. This is frequently used for monitoring °Brix in beverages, alcohol concentration, and acid strength in chemical blending.

Q: How do you handle highly corrosive fluids (pH 0–14)? A: While 316L is our standard, we offer Hastelloy C276 for high-acid environments and PEEK linings for specialized chemical applications. Our Hastelloy variants have proven to run for 18+ months without zero-point drift in aggressive H₂S (Hydrogen Sulfide) environments.

Q: What is the maximum pressure your sensors can withstand? A: We offer specialized high-pressure models capable of operating up to 100 MPa (1000 bar). These are specifically designed for high-pressure gas dosing and the emerging Hydrogen (H₂) refueling market.

Q: Is the meter affected by external magnetic fields or electrical noise? A: No. Unlike Electromagnetic (Mag) meters, Coriolis technology is immune to electromagnetic interference. Additionally, our Active Suppression Algorithm filters out 80% of industrial mechanical vibrations.

Secure Your Process Integrity with Longvista

From laboratory-scale DN02 micro-flows (50 g/h) to large-scale industrial DN200 lines, Longvista provides the metrology-grade hardware your facility demands.

Related products:

Explore our full range of Flow Meters for liquids and gases, including other types such as electromagnetic, ultrasonic, vortex, turbine, and thermal flow meters.

• Thermal Flow Meters – for gas flow measurement.

• Oval Gear Flow Meters – for high-viscosity liquids.

• Vortex Flow Meters – for steam and process gases.

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