The CALIBUS series handheld laser-induced breakdown spectrometer is a product launched by ARUN (a subsidiary of Spectrum Technology) in the UK in 2019, based on LIBS technology, to meet the rapid detection needs of the metal industry. It is a market gap for on-site rapid detection of C element in steel and can simultaneously meet the detection needs of more than 30 alloy elements such as Li, Be, Na, Mg, Al, and Si. The detection results can be obtained in 1 second, which is convenient and easy to use. It has been widely used in metallurgy, special inspection, heavy machinery manufacturing, automobiles, aerospace and other fields, with distinctive characteristics,.