The Ambient SO2 Gas Analyzer from Vasthi Instruments uses the UV fluorescence method for sulfur dioxide analysis. Combined with advanced microprocessor technology, the SO2 analyzer reads out an accurate analysis of sulfur dioxide levels in the air. SO2 analyzer,SO₂ gas monitor,Continuous SO₂ gas monitoring system,Ambient SO₂ analyzer for CAAQMS,High-accuracy SO₂ detection systemUSE... https://vasthi.com/product/25/ambient-so2-gas-analyzer