KORNO GT-903-B-IV Portable conventional four-in-one Gas detector large capacity battery high definition color screen
Oxygen (O2), hydrogen sulfide (H2S), methane (CH4), carbon monoxide (CO)
Imported electrochemistry and catalytic combustion Sensor, Response Time ≤ 30 seconds, equipped with 4000mAh large capacity battery, support three concentration Unit switch and Data storage function, with dustproof and waterproof design.