Gas detector CO; H2S; O2; CL2, GasAlertMicro 5, M5-X0CY-R-P-D-Y-Y-00

Built – in sample pump, can measure tunnels, tanks.
CHLORINE (CL2) 0 to 50 ppm 1 ppm
HYDROGEN SULFIDE (H2S) 0 to 500 ppm 1 ppm
OXYGEN (O2) 0 to 30% Vol 0.1% Vol
CARBON MONOXIDE (CO) 0 to 1000 ppm 1 ppm
More detail