E+H FLOWSIC610 Compact Ultrasonic Gas Flow Meter

Precision Ultrasonic Gas Measurement for Energy Transition

As global industries shift toward clean energy, accurate custody transfer and mass balance accounting for hydrogen and specialized process gases become vital. The Endress+Hauser FLOWSIC610 Ultrasonic Gas Flowmeter delivers high-precision, fiscal-grade volumetric flow measurement tailored for demanding hydrogen production, compression, and pipeline distribution networks. As an experienced international distributor of industrial process control instruments, we source and deliver authentic, factory-new Endress+Hauser field devices to meet strict global metrological and safety standards.

The FLOWSIC610 operates on the ultrasonic transit-time difference principle, utilizing intrinsically safe, titanium-encapsulated ultrasonic transducers. By eliminating internal moving parts or flow restrictions, the instrument prevents pressure loss and mechanical wear, ensuring long-term measurement stability. Whether installed at electrolyzer export lines, hydrogen refueling stations, underground storage facilities, or high-pressure compressor stations, the meter delivers Class 1 fiscal accuracy even under changing gas velocities and dynamic pressure fluctuations.

Advanced Hydrogen Purity & Real-Time Speed-of-Sound Diagnostics

Gas quality verification is essential during hydrogen transport and blending operations. The FLOWSIC610 provides an integrated hydrogen purity monitoring option that continuously evaluates gas composition in real time via speed-of-sound measurements.

Key diagnostic and functional highlights include:

• Real-Time Purity Tracking: Continuously monitors hydrogen purity levels (>95% purity standard, >90% on request) without requiring secondary gas chromatographs or additional physical sampling lines.

• Extreme Velocity Turndown: Operates reliably across wide turn-down ratios (up to 1:160) and gas velocities up to 60 m/s (200 ft/s).

• i-Diagnostics System: Embedded self-monitoring algorithms detect transducer fouling, acoustic noise interference, or pipe wall contamination before measurement integrity is compromised.

Full-Bore Engineering and Digital Connectivity

The FLOWSIC610 features a robust, full-bore spool piece construction that integrates seamlessly into standard process piping. Its low-power electronics make it suitable for remote, off-grid locations operating on solar or auxiliary DC power systems.

To simplify system integration and preventive maintenance, the device supports comprehensive digital fieldbus and software interfaces:

• Digital Outputs: 4x digital outputs (including up to 2x high-frequency pulse/frequency outputs up to 10 kHz).

• Field Communication: Dual Modbus RS-485 (RTU/ASCII), USB, and Bluetooth wireless access.

• FLOWgate Management Software: Intuitive graphical software interface allowing field engineers to perform quick commissioning, signal analysis, parameterization, and automated diagnostic logging.

Robust Explosion-Proof Certification & Global Compliance

Designed to withstand aggressive industrial environments and high-pressure chemical atmospheres, the FLOWSIC610 is housed in a heavy-duty Ex db ia enclosure rated for hazardous area operations. Fully certified under international standards including MID Class 1, ATEX, IECEx, and ASME pressure vessel codes, it provides reliable protection and compliance for high-pressure gas transport infrastructure.

Applications

• Hydrogen Infrastructure: Custody transfer, transport pipelines, underground storage facilities, and compressor stations.

• Electrolyzer Plant Skids: High-purity hydrogen gas metering at export pipelines and purification units.

• Industrial Gas Distribution: Fiscal metering and volume totalization of high-purity process gases in chemical plants and refineries.

• Blending & Energy Management: Hydrogen grid injection monitoring and fuel gas metering for industrial power plants.

Technical Specifications

• Measuring Principle: Ultrasonic Transit-Time Difference Measurement

• Nominal Pipe Sizes: DN 50 to DN 400 (2″ to 16″)

• Measuring Medium: Hydrogen (>95% purity standard; >90% on request), high-purity process gases

• Measured Variables: Volumetric flow a.c., volume a.c., gas velocity, speed of sound, hydrogen purity (optional)

• Accuracy:

  • MID 2014/32/EU Class 1 Metrological Approval

  • Dry Calibrated: ≤ ±0.5 % (Qt…Qmax) / ≤ ±1.0 % (Qmin…Qt)

  • Flow Calibrated with Constant Factor: ≤ ±0.2 % (Qt…Qmax)

  • Flow Calibrated with Polynomial/Piecewise Correction: ≤ ±0.1 % (Qt…Qmax)

• Repeatability: ≤ ±0.05 % of measured value

• Turndown Ratio: Up to 1:160

• Maximum Gas Velocity: Up to 60 m/s (200 ft/s)

• Operating Pressure Range: Standard 15 to 102.1 bar(g) (217 to 1,480 psi); optional 7 to 102.1 bar(g)

• Medium Temperature Range: -40 to +60 °C (-40 to +140 °F); optional up to +85 °C (+185 °F)

• Ambient Temperature Range: -40 to +60 °C (-40 to +140 °F)

• Housing & Metering Spool Material: Carbon steel, stainless steel, or low-temperature alloys

• Enclosure & Hazardous Area Protection:

  • ATEX: II 2(1) G Ex db ia [ia Ga] IIC T4 Gb

  • IECEx: Ex db ia [ia Ga] IIC T4 Gb

• Digital Outputs: 4x digital outputs (2x configurable as high-frequency outputs up to 10 kHz)

• Digital Communication: 2x Modbus RS-485 (RTU/ASCII), Bluetooth, USB

• Configuration Software: FLOWgate software for setup, analysis, and diagnostic logs

• Metrological & Pressure Approvals: MID 2014/32/EU, ASME B16.5 / B16.47, PED, CE

FAQ

Q1: What makes the FLOWSIC610 specifically suitable for hydrogen gas measurement? A1: The FLOWSIC610 utilizes high-frequency ultrasonic transducers engineered to handle the low density and high acoustic attenuation of hydrogen. It also offers an optional speed-of-sound purity indicator to monitor hydrogen concentration in real time.

Q2: Is your company the original manufacturer of the FLOWSIC610? A2: No, we are an independent global distributor and supplier of industrial process control instruments. We supply authentic, factory-new Endress+Hauser devices with full technical documentation, selection support, and international shipping services.

Q3: Does the FLOWSIC610 create pressure drop in the pipeline? A3: No, the meter features a full-bore, open pipe design with no moving parts or internal flow restrictions, resulting in zero head loss or pressure drop across the device.

Q4: How does FLOWgate software assist with device operation and diagnostics? A4: FLOWgate software allows plant technicians to connect directly to the flowmeter via USB, Modbus, or Bluetooth to perform quick device configuration, view real-time ultrasonic signal quality, and download automated diagnostic safety logs.

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