BWC2-S24 Gasalertclip Extreme – SO2 Description Description Range 0 – 20 PPM 24 Month life Water-resistant Built-in concussion-proof boot Related products BWC2-H510 Gas Alertclip Extreme – H2S MCXL-XWHM-Y-NA BW Gas Alert Microclip XL 75SCP100 Gas and Vapor Cartridge with P100 2001G – DEMAND FLOW REGULATOR