For the PortableGas Detector, it is a small, portable portable gas detector that can be used to detect gas leakage concentrations anytime, anywhere. It has the characteristics of high sensitivity, stable work, fast response and recovery time, good gas selectivity, and strong anti-interference ability, and adopts high-performance lithium battery with long working time, while using charging protection and low voltage protection to ensure that the battery is more reliable and has a longer life.