Winner311PRO is a new generation desktop spray particle size analyzer designed and developed mainly for droplet particle size testing of small spray equipment. Based on Winner311XP, it incorporates more unique micro-nano technologies, innovative design of external automatic mobile platform, optical path The design is more optimized, the detection channels are wider distributed, the algorithm is more stable, and the application is more intelligent. Winner311PRO can perform non-contact particle size measurement of droplets, liquid droplets, smoke, aerosol, powder mist, etc. dispersed in the air, and meets the requirements for particle size testing of inhaled aerosols, sprays, powder mist, etc. specified in the National Pharmacopoeia. , filling the gap of domestic laser particle size analyzer in measuring droplet size of small atomization devices.