Physical louver box is a radiation proof ventilation device designed specifically for measuring meteorological elements such as temperature and humidity. It uses a unique double-layer louver structure to protect the instrument from direct sunlight, rain, snow, and ground reflection radiation, while ensuring natural ventilation and ensuring that sensor readings can represent the free atmospheric state at a height of 1.5 meters. Provide benchmark data for weather forecasting, climate research, agricultural monitoring, and urban environmental monitoring. Application scenarios: National/provincial meteorological observation stations; Campus science popularization and scientific research experiments; Smart agriculture and ecological monitoring stations; Urban grid based environmental monitoring micro station.