Thermal Mass Flow Meter Working Principle

The instrument uses the constant temperature difference method to accurately measure the gas.

Thermal mass flow meter working principle. What is the thermal mass flow meter working principle. Differential pressure techniques can be used for indirect mass flow measurement of steam but as mentioned above direct mass flow measurements are much better than indirect mass flow measurement. Thermal mass flow meter is a true mass flow meter. Thermal mass flow meters employ the thermal dispersion principle whereby the rate of heat absorbed by a fluid flowing in a pipe or duct is directly proportional to its mass flow.

Volumetric measurements are affected by all ambient and process conditions that influence unit volume or indirectly affect pressure drop while mass flow measurement is unaffected by changes in viscosity. Gas flows by the heated flow sensor and molecules of the gas transport heat away the sensor cools and energy is lost. Many mass flow controllers mfc which combine a mass flow meter electronics and a valve are. In this video from sierra you ll learn the theory and working principles of thermal dispersion mass flow technology that is used in our gas flow meters.

Thermal mass flow meters also known as thermal dispersion or immersible mass flow meters comprise a family of instruments for the measurement of the total mass flow rate of a fluid primarily gases flowing through closed conduits a second type is the capillary tube type of thermal mass flow meter. The thermal mass meter measures gas flow based on the concept of convective heat transfer. No temperature and pressure compensation is required. Thermal mass flow working principle theory and design.

Thermal gas mass flow meters are designed based on the principle of thermal diffusion. Volumetric measurements are affected by all ambient and process conditions that influence unit volume or indirectly affect pressure drop while mass flow measurement is unaffected by changes in viscosity density temperature or pressure. Thermal mass flow meters measure the mass flowrate of gases and liquids directly. Vortex flow meters are ideal for steam flow measurement because other mass flow meters or volumetric flow meters cannot measure steam.

Thermal mass flow sensors measure the mass flowrate of gases and liquids directly.