BWC2-H510 Gas Alertclip Extreme – H2S Description Description Range 0 – 100 PPM 24 Month life Water-resistant Built-in concussion-proof boot Related products ALTAIR® 2X Gas Detector MCXL-XWHM-Y-NA BW Gas Alert Microclip XL QT-XWHM-A-Y-NA Gas Alert Quattro 58L-421 – CALIBRATION GAS 58L