CENTRIFUGAL MICROFLUIDIC SYSTEM

A centrifugal microfluidic system. The centrifugal microfluidic system includes a top layer, a bottom layer, and a middle layer. The middle layer may include an inlet chamber, a radial guide channel, a moveable magnet, a first connecting channel, a sealing beam, a target chamber, a second connecting channel, and a first stationary magnet. When the middle layer rotates around the center of the middle layer with a speed less than a threshold rotational speed, the fluid sample is prevented from flowing to the target chamber from the inlet chamber. When the middle layer rotates around the center of the middle layer with a speed greater than the threshold rotational speed, the fluid sample is allowed to flow to the target chamber from the inlet chamber through the first connecting channel and the second connecting channel.