Abstract: A micro-separator for separating red blood cells from blood serum in a blood sample is provided. The main mechanism driving the separation of the blood sample is centrifugal force. With physical mechanisms including surface tension and functional microstructures, the red blood cells and the blood serum in a small volume of blood (about 25 micro-liters) are separated. The entire micro-separation apparatus is disposed on a disk-shaped structure. The micro-separator can integrate with other micro-devices such as micro-mixers, micro-distributors or micro-reactors to form a fully functional apparatus. Combining the rotary driver of a CD player and an optical inspection device with a signal processing system, an inexpensive, fully automatic, parallel-processing inspection system is produced.