4 in 1 Gas Detector Analyzer Portable O2 CO H2S LEL GasTester

Features this product combustible oxygen carbon monoxide hydrogen sulfide the concentration of the lel providing light vibration hum triple alarm function. Let you get effective and timely alarm signal thus away from danger. This instrument can be used for agriculture petrochemical electric power fire gas steel industry sewage treatment and other fields. specifications o2 measuring range 0 ~ 30 resolution 0.1 lel measuring range 0 ~ 100 resolution 1 h2s measuring range 0 ~ 500 ppm resolution 1 ppmco measuring range 0 ~ 9999 ppm resolution 1 ppmworking temperature – 10 ~ 50 ???working humidity 15 ~ 90 rh no condensation customizable set alarm value power supply 3.7 v lithium battery package included 1 x 4 in 1 gas detector