| The methods of gas-particle two-phase flows' concentration are summed up and compared. The theory of temperature methods is introduced; and then the online concentration of coal-powder monitor system based on microcontroller is expatiated. Temperature signals got by RTD are transformed to numerical signals, and computed by microcontroller system, and then results are displayed by the display system. At last the errors of this system are analyzed. The precision is so good that can reach the industrial requirement. This system has many advantages, such as low cost, reliability, and some of them have been applied to power plant.
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