The invention relates to a nanometer flow sensor based on the
field effect tube in particular to a nanometer flow sensor which can magnify the microscopic variations of
conductivity of medium into the
drain current fluctuation of the
field effect tube. The invention comprises the
field effect tube grid, wherein the nanometer channel is arranged on the field effect tube grid, two sides of the nanometer channel are connected with left and right
micrometer channel, the grid
control circuit comprises the medium in the
micrometer channel, the medium in the nanometer channel and positive-negative
electrode, and the electric resistance of the grid
control circuit comprises the electric resistance R of medium in the nanometer channel and two electric resistances R1, R2 of medium in the
micrometer channel. The aim of the invention is to provide a
high fidelity nanometer flow sensor based on the field effect tube which can magnify the microscopic variations of
conductivity of medium into the
drain current fluctuation of the field effect tube.