Hydrothion O2 AS8900 AS-8900 Co Combustible Gas Detector 4 In 1 bk
Co Combustible Gas Detector AS8900 O2 AS-8900 4 In 1 Hydrothion. Oxygen/Hydrothion/. Carbon monoxide/Combustible. Combustible Gas:0~100%LEL. O2:0~30%vol. Acoustic,optical double alarm, can set the alarm value.