The BW-CSD9220 handheld chemical agent detector integrates advanced ion migration spectroscopy technology, Raman spectroscopy technology, and array electrochemical sensing technology, combined with intelligent recognition algorithms, to quickly and accurately identify toxic and harmful substances in complex environments and provide warning information. The instrument can simultaneously detect chemical warfare agents (CWAs) in solid, liquid, and gas forms, as well as industrial toxic and harmful gases (TICs), and detect targets in real-time. Widely used in environmental monitoring, border ports, customs, airports, firefighting, emergency rescue, chemical defense forces and other fields, this instrument is lightweight, beautiful, highly reliable, adopts embedded design, simple and convenient human-computer interaction, and is easy for staff to carry around....