GasAlertMicro 5 PID is a portable five-in-one gas detector that can simultaneously measure VOC, H2S, CO, O2, SO2, PH3, NH3, NO2, HCN, Cl2, ClO2, O3 and other gases. It has shockproof, waterproof and other characteristics. It has a built-in vibration alarm, supports multiple languages, and optional user download data recorders, sampling pumps, and confined space kits.