The Micro-Well System is a state-of-the-art fine particle collection and desorption device, tailored for mass spectrometry applications. It captures particles using an aerodynamic focusing inlet, depositing them in a 1.5 mm micro-well. For analysis, a controlled thermal desorption process is facilitated by a dedicated carrier gas inlet, ensuring precise transport of volatiles to the outlet for downstream detection. This compact, efficient system is ideal for fine particulate monitoring in environmental and chemical research, enabling accurate data collection with minimal sample loss.