1.monitor the TSP,PM10,PM5,PM2.5 2.reducing sample processing time and polluted opportunities TH-β10 ... ofβray absorption can monitor the TSP,PM10,PM5,PM2.5. The result is free from the shape, size, light refractive ... ,half-life period 5730years,intensity ≤100 microcurieSpots area0.5cm2±1.5%Full-scalevalue2.0mg/cm2±1.5%repeatability2.5%Data storage200 groups