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Thermal Mass Gas Flow Meter

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December 24, 2025
Category Connection: Gas Flow Meter
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Brief: In this walkthrough, we highlight key design ideas and how they translate to performance. Discover how the HQRS Thermal Gas Mass Flow Meter operates in harsh environments, its direct mass flow measurement without pressure compensation, and its versatile communication interfaces including Bluetooth and fieldbus options for modern factory automation.
Related Product Features:
  • Directly measures mass flow and standard volumetric flow rate without requiring temperature or pressure compensation.
  • Features a robust IP67-rated housing for all-weather application and harsh outdoor environments.
  • All gas-contacting parts are constructed from corrosion-resistant 316L stainless steel.
  • Holds ATEX explosion-proof certification for measuring explosive gases like natural gas and hydrogen.
  • Supports multiple communication interfaces including 4-20 mA, pulse output, HART, MODBUS, M-BUS, and Bluetooth.
  • Modular design allows for easy adoption of other fieldbus protocols and customization.
  • Suitable for a wide range of pipe diameters from DN15 to DN300, with larger sizes available on request.
  • VA450 display is adjustable and shows flow rate, consumption, medium temperature, and diagnostic results.
FAQs:
  • Does the HQRS Thermal Gas Mass Flow Meter require pressure or temperature compensation?
    No, the HQRS meter directly measures thermal mass flow and displays the standard volumetric flow rate without requiring any temperature or pressure compensation.
  • What types of gases can this flow meter measure?
    It can measure a wide variety of gases, including explosive gases like natural gas, hydrogen, and biogas, as well as corrosive gases. As long as the gas mixture's composition and mixing ratio are known and stable, it can be measured.
  • What communication interfaces are available with the HQRS flow meter?
    The meter supports traditional 4-20 mA and pulse outputs, along with fieldbus interfaces like HART, MODBUS, and M-BUS. It also features Bluetooth for wireless on-site adjustments and is modular to accommodate other protocols.
  • Is the flow meter suitable for harsh or outdoor environments?
    Yes, it is designed for harsh environments with an IP67 protection rating, corrosion-resistant 316L stainless steel construction, and robust housing for all-weather application.
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