Specialized Product: Hydrogen Mass Flow Meter – Coriolis CMASS003 Series

The CMASS003 series Coriolis mass flow meter is a dedicated flow meter for measuring the mass flow rate of hydrogen gas. Suitable for high-precision flow measurement in harsh environments, it is designed for extreme environments such as hydrogen (H70/H35), CNG refueling, and high-pressure industrial gas applications. It directly measures mass flow rate with an accuracy of up to ±0.1%, unaffected by changes in fluid density, viscosity, or pressure, thus ensuring reliable data for critical trade handovers and process control.

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Features

Technical Parameters

Transmitter Specifications

Featured Applications

In fields such as hydrogen energy, CNG, and other high-pressure gas applications, precise, safe, and reliable flow measurement is the core of operations. Our Coriolis CMASS003 Series Hydrogen Mass Flow Meter is specifically designed to handle extreme pressure conditions, offering you flawless metering solutions.

Wide Application Fields

This series of flow meters is the ideal choice for the following high-pressure gas metering scenarios:

• Hydrogen Energy Industry: Hydrogen refueling stations (H70/H35), hydrogen production plants,
• hydrogen fuel cell testing platforms, hydrogen storage system metering.
• CNG (Compressed Natural Gas) Field: CNG refueling stations, mother/child station trade transfer
• metering, compressor outlet flow measurement.
• High-Pressure Industrial Gases: Various high-pressure cylinder refilling (such as helium, oxygen, argon), special gas metering, purge gas flow control.
• Research & Testing Platforms: Laboratory R&D, engine testing stands, valve and pipe testing.
• systems requiring precise high-pressure gas metering.
• High-Pressure Chemical Processing
• Cryogenic Gas Liquefaction (LNG/Liquid Nitrogen)

Why can’t a standard Coriolis mass flow meter measure hydrogen gas?

Conventional mass flow meters can measure hydrogen, but their accuracy will be low. Especially in extreme conditions like at hydrogen refueling stations, standard Coriolis mass flow meters are insufficient. Therefore, specially designed “dedicated hydrogen mass flow meters” have been developed.

Why can’t conventional Coriolis mass flow meters measure hydrogen?

1. Pressure Rating

Conventional industrial Coriolis flow meters typically withstand pressures of only 4–10 MPa. Hydrogen refueling stations, however, require pressures of 35 MPa or even 70 MPa, corresponding to standard H35 and H70.

2. Hydrogen Embrittlement

Hydrogen molecules are only 0.29 nm in diameter, allowing them to penetrate the metal lattice and crack under stress. While standard 316L tubing can be used at low pressures, high-pressure, long-term hydrogen environments require strict control over material composition (low sulfur, low phosphorus), grain size, and austenite stability, meeting standards such as ASME B31.12 or ISO 11114-4. Using ordinary tubing directly for high-pressure hydrogen measurement will inevitably lead to problems.

3. Low Density Leads to Weak Signal

Hydrogen has a density of 0.0899 kg/m³, which is 1/14 the density of air. The Coriolis principle is based on the Coriolis force generated by fluid mass; the lower the density, the weaker the signal and the worse the signal-to-noise ratio. Ordinary Coriolis meters are inherently less accurate at measuring gases than liquids (liquids can achieve 0.05–0.1%, while gases are generally 0.25–0.5%), making hydrogen measurement even more challenging. Dedicated hydrogen meters often use smaller diameter, higher-frequency vibrating tubes to compensate for this.

4. Micro-Leakage Issues

Hydrogen molecules are small, making ordinary threaded/flange seals prone to leakage. Hydrogen has a lower explosive limit of only 4% and a minimum ignition energy of 0.017 mJ (1/15 of methane), so leaks are dangerous. Therefore, the process interfaces of dedicated hydrogen gauges almost always use the same type as medical gas cylinders/conical seals (9/16-18 UNF, 13/16-16 UNF, HiP coned-and-threaded, etc.), rather than ordinary NPT threads or flanges.

Technical Support

Of course, in addition to supplying dedicated hydrogen mass flow meters, Sino-Inst also supplies hydrogen flow meters and hydrogen mass flow controllers for general industrial use. Feel free to contact us anytime for customized solutions.

Zhang Wei

Zhang Wei, possesses 20 years of experience as an automation instrumentation engineer, specializing in the research, design, installation, commissioning, and maintenance of automation instruments.

Face to various instrument communication protocols (such as Modbus, Profibus, etc.), with solid hardware circuit design and software programming skills (proficient in C language and PLC programming). Has extensive project experience; projects he has led and participated in have all achieved outstanding results, improving product accuracy, reducing costs, and increasing production efficiency.

Possesses excellent communication and coordination skills and a strong team spirit, enabling him to quickly respond to customer needs and provide high-quality automation instrumentation solutions.