Inline Thermal Gas Mass Flowmeter

Approved by：CE, SIL-3, ATEX Explosion-proof certification

Our inline-Type Thermal Gas Mass Flowmeter provides precise and stable gas mass flow measurement based on the thermal dispersion principle. Designed for fixed pipeline installations, it directly measures mass flow without the need for temperature or pressure compensation. Its digital intelligent design, robust stainless-steel construction, and high-temperature tolerance make it ideal for demanding industrial applications such as power generation, petrochemical processing, and environmental monitoring. With no moving parts, it ensures long-term reliability, minimal maintenance, and seamless integration into automation systems.
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  • True Mass Flow Measurement: Measures gas mass flow directly — no pressure or temperature compensation required.
  • Wide Measuring Range (0.1–120 Nm/s): Handles both high-volume process gas and micro-flow leak detection with accuracy.
  • Digital Signal Processing: Ensures stable readings and exceptional repeatability (±0.25%), even under vibration.
  • Corrosion-Resistant: 316L SensorReliable operation with corrosive gases like chlorine, biogas, or flue gas.
  • Zero Pressure Loss Design: Minimizes energy waste in pipelines — ideal for continuous systems.
  • Fast 1-Second Response: Enables real-time monitoring and precise process control.
  • Explosion-Proof(ExdⅡCT4): Safe for hazardous industrial zones.
  • Multiple Output Protocols: 4–20 mA, RS-485 (MODBUS), and optional HART for seamless PLC/DCS integration.
  • Maintenance-Free Operation: No moving parts or pressure sensors — long service life and stable calibration.
  • Easy Installation: Compact in-line body fits directly between flanges, compatible with all pipe materials.
  • Measuring Medium: Single or multi-component gases (except acetylene)
  • Pipe Size: DN 15 – DN 2000 mm
  • Flow Velocity Range: 0.1 – 120 Nm/s
  • Accuracy: ±1% of reading / ±0.5% FS
  • Repeatability: ±0.25%
  • Medium Temperature: –40 °C ~ +350 °C
  • Working Pressure: ≤ 6.0 MPa
  • Power Supply: DC 24 V 1 A / AC 220 V ±10%
  • Output Signals: 4 – 20 mA, RS-485 (MODBUS), Pulse, optional HART
  • Protection Class: IP68 (Sensor) / IP67 (Transmitter)
  • Display: LCD — Instantaneous Flow, Total Flow, Date, Time, Cumulative Run Time
  • Explosion-Proof Rating: ExdⅡCT4 / ExibIIBT6

  • Integrated Type — Compact transmitter + sensor design, ideal for standard pipelines.

  • Split Type — Transmitter separated from sensor for high-temperature or hard-to-access areas.

Connection Options:

  • Flange Connection (DN15–DN2000, GB/T 9119 Standard)
  • Threaded or Clamp Connection (for DN ≤ 80 mm or sanitary systems)

Material Options: Carbon steel or 316L stainless steel; other alloys on request

  • Power & Energy: Accurate measurement of combustion air, flue gas, and process gas in thermal power plants and boiler systems.

  • Petrochemical & Gas Processing: Reliable flow control of hydrogen, nitrogen, natural gas, and flare gas under high temperature and variable pressure conditions.

  • Metallurgy & Manufacturing: Continuous measurement of process gases in steelmaking, heat treatment, and furnace applications.

  • Water & Environmental Management: Monitoring of biogas, aeration air, and exhaust gases in wastewater or emission control systems.

  • Industrial Utilities & Compressed Air Systems: Flow auditing, energy management, and leak detection in factory air networks.

  • Mining & Infrastructure: Airflow measurement in tunnels, shafts, and ventilation ducts for operational safety and system optimization.

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