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Thermal Mass Flowmeters

Thermal Mass Flowmeters
Thermal Mass Flowmeters
Product Code : ADM-001
Brand Name : Addmas
Product Description

To meet the variegated requirements of our clients, we bring forth an impeccable range of Thermal Mass Flowmeters that is used to measure the flow and pressure of compressed gases and air. Our offered flowmeters are manufactured in compliance with the international quality standards using supreme quality raw material under the guidance of our diligent experts. Further, the entire range is tested by a team of quality controllers on various parameters to ensure their flawlessness. Offered Thermal Mass Flowmeters can be availed at pocket-friendly prices.


  • Rugged design

  • Long functional life

  • Low maintenance

  • Accurate result


Thermal sensor consists of two sensing elements - a velocity sensor and a temperature sensor that automatically corrects for changes in gas temperature(figure1). The transducer electronics heats the velocity sensor to a constant temperature differential above the gas temperature and measures the cooling effect of the gas flow. The electrical power required to maintain a constant temperature differential is directly proportional to the gas mass flow rate.

In order to keep the stable temperature between Ts and Ta, circuit should be provided higher power. The range of power is related to the mass flow rate of liquid. Through test the output of power can get the mass flow rate. Furthermore, the heat on the heated velocity sensor bring by the move of gasses not cause the heat exchange. So this kind of flowmeter can measure all kinds of gases. The table of AT Series Thermal Mass Flowmeter please see figure.

Classic ITMF flow meter consists of two temperature sensor figure 2. A measured portion of heating power p be put into one sensor to rise the temperature to measured alue T2. Other sensor test gas temperature T1. Gas mass flow can be assured according to the difference between heated sensor and gas in temperature (–³T=T2-T1) and heating power P.

T P = K + K x (Q )K3