The portable colorimeter is an instrument used in colorimetry that measures the absorbance of particular light wavelengths by a specific solution. It consists of a small handheld device equipped with a 10ml glass bottle, allowing quick and convenient measurements of absorbance rates in the range of 0-3 Abs. It also supports several parameter detections, including wavelengths of 420nm, 470nm, and 620nm. Moreover, it includes 10MB of storage space to save test results.