Thermal Mass Flow Meters are manufactured mainly in the western world. Manas is a unique Thermal Mass Flow Meter Supplier and Exporter from India, that has the capability to manufacture, assemble, test & calibrate the flow meters in-house. How does a Thermal Mass Flow Meter work? Whenever a fluid of a certain temperature is passed over any substance hotter than the fluid, the heat of the hot substance is taken away because of forced convection by the fluid, and the temperature of that substance drops. This fall in temperature is related to the mass flow of the fluid passing over the substance. If one can measure the amount of heat taken away by the flowing fluid one can calculate the mass flow rate.

1. Mass Flow Meter
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Mass Flow Rate is the total molecular mass passing through a cross-section
of a given pipeline per unit of time.
The basic formula for calculating the Mass Flow Rate is
m=ρ×V×A, where
Mass Flow Rate = (density) × (velocity) × (area of the cross-section)
What is Mass Flow Rate?

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What is Mass Flow Meter?
• A mass flow meter, is also known as an inertial flow meter.
• It measures the mass flow rate of a fluid flowing through a tube.
• The mass flow rate is defined as the mass of a fluid passing
through a fixed point in one unit of time.

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Difference between Mass Flow and Volumetric Flow
Mass Flow Volumetric Flow
Mass Flow rate is the total molecular mass
passing through a cross-section of a given
pipeline per unit of time.
Volumetric Flow rate is the total volume
occupied by the molecular mass that passes
through the cross-section of a given pipeline per
unit time
Precisely measures the flow of gas molecules
into or out of a process, regardless of
temperature or pressure conditions
Measures flow of gas without considering the
density of the process gas
Mass Flow is the amount of a mass moving
through an instrument over time.
Volumetric flow is a three-dimensional measure
of a substance moving through an instrument
over time.
Measured in pounds/hour or kilograms/second
or in similar international units.
Popular units of measurement for volumetric
flow rate are meters3 /second, millilitres/second,
or feet3/hour.

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Types of Mass Flow Meter
There are two types of mass flow meters.
1. Direct measurement of Mass flow
rate-
Meters based on Coriolis principle or
Thermal Dispersion principle are Direct
Mass flow meters
2. Indirect method of measuring mass
flow rate-
Meters based on turbine,
electromagnetic, differential pressure,
etc. principle can be converted to
Indirect Mass Flow Meters.
Thermal mass flow meter
Differential Pressure flow meter

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