HRP-B1000-4 Standard 4 in 1 Gas Detector's video

HUIRUIPU HRP-B1000-4 standard four-in-one Gas Detector can detect EX/O2/C0/H2S four gases, the amount range EX: 0-100% LEL O2:0-30% VOL C0:0-1000PPM H2S: 0-100PPM, resolution 1% LEL/0.1% VOL/1PPM/0.1PPM.