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Hot wire flow meter anemometer

Principle of Hot-wire anemometer

The basic principle of hot-wire anemometer is a thin metal wire line in a fluid, through the current heating wire (hot wire), make its temperature is higher than the temperature of the fluid, when the fluid flows through the wire along vertical direction, will take away part of the wire heat are introduced to make wire temperature drop.

The heats dissipating capacity is related to velocity, hot wire temperature change caused by the resistance resulting from heat dissipating capacity of the velocity signal into electrical signal, a typical hot-wire anemometer principle as shown: