An exposed near infrared ray spectrum analysis equipment and a method of measurement for measuring the concentration of the milk my antibiotic makes the replacement facilitated by modularizing the cell for the sampling import. An exposed near infrared ray spectrum analysis equipment for measuring the concentration of the milk my antibiotic comprises a sample introducing part which in order that measures the concentration of the milk my antibiotic, is exposed by outside, a radiating and radiated part which collects the absorption spectrum in which the near infrared ray is absorbed by the milk and which is generated., a spectral and detection unit converting the collected far red light into the electric signal, and outputs one data, a data processing and collecting unit determining the residue state and concentration of the milk my antibiotic, and a display unit(5) which visually indicates the remaining density of the antibiotic measured in data processing and gathering unit.
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