Thermal dispersion mass flow meter

Thermal Dispersion Mass Flow Meter Working Application and Benefits

The measurement instrument Thermal Dispersion Mass Flow Meter measures the gas flow and is based on convective transfer of heat concept.
These gas mass flow meters can be found in either the insertion thermal mass flow meter or in line thermal mass flow meter. In both of these cases, the probe of thermal dispersion mass flow sensors gets inserted in a pipe stream, a duct or a stack filled with gas. Towards the meter's tip there are two main sensors and both of these are known as resistance thermometers or resistance temperature detectors (RTDs) and these are meant for measuring temperature.
These RTDs are available with platinum windings of durable reference-grade that are packed in Hastelloy C casing or 316 SS.
One RTD gets heated through functions and integrated circuit as flow sensor device, while the second RTD would act as reference sensor, and this also determines temperatures of the gas. Also, Thermal dispersion mass flow meter proprietary circuitry sustains continuous over heating between reference sensors and flow sensors. As these gases flow through heated RTD, the flowing molecules of gas are easily able to transport away the heat, and as an outcome, the energy gets lost upon sensor cooling.
There is disruption in circuit balance, and also temperature differences between reference RTD and heated RTD changes. Only in a second, circuit is able to restore all lost energy through flow sensor heating, for adjustment of overheat temperature.
Electrical power for sustaining the overheat would denote signal for mass flow.

Benefits of Thermal dispersion mass flow meter

• These gas mass flow meters don't have any moving parts, leading to reduction of maintenance and also permits use in demanding areas of application.
• The digital  gas flow meters are ideal for calculation of mass flow instead of volumetric flow and these don't require pressure correction or temperature meaning that no additional expenses for installation or purchase of equipment is required.
• Thermal dispersion mass flow meter would offer great repeatability and accuracy for offering great flow range rates.
• The thermal flow meters are easily able to measure large pipe flow.

Some FAQs

What are different flow meter types?
Gas meter for measurement of flow are velocity flow, mass flow, positive displacement and differential pressure meters.

What are some benefits of insertion thermal mass flow meter vs in line thermal mass flow meter?
These are two of the major meter configurations and both are referred to integral meters. Insertion type thermal dispersion mass flow meter mainly for large pipelines over 4” , while inline thermal dispersion mass flow meter are mainly for pipelines within 4 inches.

Volumetric vs mass flow?
Thermal mass flow meter can measure mass flow meter, while gas turbine flow meter or vortex flow meter can detect gas volumetric flow