The thermal mass flow meter is a direct mass flow meter used to measure the total mass flow rate of gases through closed conduits, with no moving parts and no need for pressure or temperature compensation. It operates using two platinum RTD temperature sensors, allowing for accurate measurements even in low-pressure conditions. The meter is suitable for various applications including gas consumption measurement, automobile testing, and industrial monitoring.

1. Thermal Mass
Flow Meter
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Manas Microsystems
Technology | Excellence | Trust

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About Thermal Mass Flow Meter
• It is used to calculate the total mass flow rate of fluid,
mainly gases, flowing through closed conduits.
• It is a direct mass flow meter with no moving parts
• Works effectively for large pipelines.
• Doesn’t require any pressure and temperature
compensation

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Theory of Operation
• Thermal Mass Flow Meter contains two Platinum
RTD temperature sensors
• One sensor measures the fluid temperature as a
reference.
• The second sensor is heated and has a constant
temperature differential relative to the first sensor.
• When the flow of air/gas starts, heat is taken away
from the warmer sensor.
• The amount of heat taken away is having a direct
relation with the mass velocity of the fluid. That is how
it is a direct mass flow meter works.

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Features of Thermal Mass Flow meter
• Simple for installation.
• There are no moving parts.
• Pressure and Temperature compensation is not
required.
• Almost unobstructed straight flow path.
• Very negligible pressure loss and pressure requirement,
unlike differential pressure flow meters.
• Straight pipe runs can be reduced by using flow
conditioners or flow straighteners.
• Very good repeat accuracy.

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Applications of
Thermal Mass Flow Meter
• Compressed air/ Gas Consumption measurement
• Gas measurement at very low-pressure flowing
conditions
• Fuel Gas like CNG consumption measurement and
control
• Automobile gas engine testing
• Industrial oxygen flow measurement and control
• Furnace and burner control
• Biogas measurement in digester biogas digester
systems

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Technical Specification
Feature Description
Line Size DN 15 to DN 200
End Connection Flange/BSP(M) Threading/ Direct clamp mounting.
Accuracy ±3 % of Actual Flow Rate between 100% to 5% of Calibrated range
Display Blind/LCD 16/2.
Output 4-20 mA/RS 485, Pulse, Wireless Data Transfer.
Ingress Protection IP- 65
Operating Fluid Temp 0 – 100℃
Operating Fluid Pressure Up to 10 bar
Power Supply
24Vdc/150mA (Without Wireless communication) 24Vdc/300mA (With Wireless
Communication).

7. We are certified with:
ISO/IEC 17025:2017 | ISO 9001:2015
ISO 14001:2015 | OHSAS 45001:2018
THANK YOU
EL 54, Electronic Zone,
J-block, MIDC Bhosari,
Pune 411026.
Maharashtra, India.
Tel: 8484039026 Ext. No. 106
Mob: +91 77220 34924 / 74200 99054
mktg@manasmicro.com
www.manasmicro.com