1.the latest portable atmospheric sampler 2.monitor TSP, PM10, PM5, PM2.5, and harmful gas composition SO2, CO, CO2, NOx. Main features:1. combined with particulate sampling, gas sampling function.2. sampling ambient particulated matter (e.g. TSP, PM10,PM5, PM2.5) and SO2, CO, CO2, NOx.3. The instrument can also collect simultaneously four gas samples and a particulate sample, which control ...