toxic gas monitor,Explosion proof,intrinsically safe,Corrosion resistant,4-20 mA or CAN bus output HK-7200AToxic Gas Detector OverviewThe Ex HK-7200A ... visual alarm available SpecificationDisplayLEDIt shows concentration ,high alarm, low alarm and fault alarmMeasurementToxic GasesPrincipleElectrochemicalSample MethodDiffusionMeasurementO2 , CO, H2S, H2, Cl2, SO2 and other toxic gasesAccuracy ...