Pump suction typegas detectorThe characteristics of the detection speed are fast, the current dangerous areas can be measured at a long distance, the safety of maintenance personnel is maintained, the pump suction type is suitable for special occasions such as: people should not enter, or it is not easy to enter the tunnels, pipelines, sewers, tanks, sealed containers, etc.carbon monoxide detector，Hydrogen sulfide alarm device，Flammable Gas Alarm Device, etcgas detectorinstrument.