To solve the problem induced by detection for interface of the blood samples in the field of medical detection

a detection method and equipment which based on the optoelectronic senor are presented

which voided cross-contamination when detected.The penetrate rate of the serum and blood cells and the principle of detecting method are analyzed under the specific wave length range.The structure and measurement process of the detection method and equipment are given.According to the experiment data

the method is easy and practical

also has a good stability

the precision is 0.3mm and totally meets the aquirements of automatic detection the interface in the process of sub-sample systems.