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Thermal Mass Flowmeter
Water Meters

Thermal Mass Flowmeter

Thermal gas flowmeters are designed based on the principle of thermal diffusion to directly measure mass flow and display standard flow without temperature and pressure compensation. The instrument adopts the method of constant temperature difference or constant power to measure the gas accurately. It has small size, high digitization degree, and wide range ratio, which is not affected by temperature and pressure changes, flexible installation with optional insertion and high precision.

    Thermal gas flowmeters are designed based on the principle of thermal diffusion to directly measure mass flow and display standard flow without temperature and pressure compensation. The instrument adopts the method of constant temperature difference or constant power to measure the gas accurately. It has small size, high digitization degree, and wide range ratio, which is not affected by temperature and pressure changes, flexible installation with optional insertion and high precision.

    Application  Feature

    • Compressed air, air volume
    • Nitrogen and other dry gases
    • Ultra-low flow gas

    Feature

    • The range ratio is extremely wide, and small flow rate and large flow rate can be measured simultaneously.
    • No temperature, pressure compensation required.
    • Wide range of measuring calibers, optional tube segment or plug-in installation.
    • It can complete the leak detection work of process pipeline and equipment.
    • Plug-in construction is minimal, requiring only one M20×1.5 hole in the pipe.
    • Standard with ball valve, easy maintenance.

    Product Parameter

    Model

    Performance Parameter

    Suitable mouth diameter

    Ф15-Ф3000mm

    Suitable medium

    Gases compatible with stainless steel, (air, hydrogen, nitrogen, acetylene gas, etc.)

    Precision

    1.5%

    Reproducibility

    ±0.15%FS

    Intermediate temperature

    Room temperature: -20-100℃ High temperature: -20-200℃

    Medium pressure

    <3MPa

    Power supply

    24VDC or 220VAC

    Signal output

    pulse signal, 4-20mA

    Communication output

    RS485, HART protocol

    Installation mode

    Pipe segment, insert type

    The straight pipe section requires

    10D upstream and 5D downstream

    Protection grade

    IP65

    Explosion-proof Class

    ExdIICT4