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What is the Principle of Operation of Thermal control Flow Meters? A flow meter that measures either the flow of a fluid flowing through a closed conduit like a pipe or a duct using the thermal properties of that fluid is known as a thermal control flow meters. While most of these are used to measure the gas flow, some of it is also used to measure the fluid flow. It is used in various industries with a broad variety of functions. It is essential to understand the working standards of a thermal control flow meters in order to decide if it will be suitable for your application. Below is a comprehensive principle of operation of it:
The working principle of the thermal control flow meter is based on the King’s Law that suggests how the heated wire when dipped in a fluid flow determines at a point in the flow the mass velocity. It is based on the theory of conductive and convective heat transfer. Two sensors are supported either using in-line flow bodies or insertion style probes of the meter. These sensors are then interfaced with the fluid being measured. The popular of these sensors is the Resistance Temperature Detectors (RTD), consisting of tremendously sturdy winding that is clad in a protective sheath. Heat is introduced into the flow stream of the fluid. A large amount of heat is lost with the increase in the flow of the fluid and the amount of heat dissipation is measured by using one or both of these temperature sensors.