BWC2-S24 Gasalertclip Extreme – SO2 Description Description Range 0 – 20 PPM 24 Month life Water-resistant Built-in concussion-proof boot Related products 70-0.5 – FIXED FLOW REGULATOR 0.5LPM ALTAIR® Single-Gas Detector 2001G – DEMAND FLOW REGULATOR BWC2-H510 Gas Alertclip Extreme – H2S