DUST SPECTROMETER is a spectrometer type fine dust measuring device that can also be used as a particle coefficient in a semiconductor clean room. PM10, PM2.5, and PM1.0 can be monitored in real time by polarizing fine dust over 24 channels of multiple channels, and simultaneous measurement of dust count and mass concentration by mouth is possible. It has a high accuracy of more than 95% reproducibility, can set measurement and storage intervals, and can transmit measurement data using communication modules. In addition, as the 12V built-in battery has a long operating time of more than 10 hours and the weight is lighter, it can be used for various purposes such as mobile, portable and fixed installation.