CJYB4/25 mine explosion methane oxygen two parameters methane alarm Alarm Product Introduction This product is a new generation of oxygen alarm intelligent two-parameter detector can continuously detect the presence of explosive mixtures of flammable gases and oxygen in ambient concentrations of methane, with sound and light alarm, clock, voltage display, low voltage alarm, automatic zero tracking, adjustable, easy to use features. Alarm methane oxygen two main technical parameters Specifications Item Specification methane oxygen measurement range (0 ~ 4)% CH4 (0 ~ 25)% O2 basic error ≤ ± 10% ≤ ± 3% sensor life> 12 months> 24 months (imported electrochemical) Response Time <20s Display 4 LED Alarm intermittent sound and light alarm, alarm point continuously adjustable alarm points continuously adjustable (factory set 1% CH4, 18% O2) ≥ 80dB sound level intensity degree of protection IP54 battery pack Ni-Mh1800mAh × 3 continuous working time> 15 h proof type Exibd I Dimensions 116 × 56 × 25mm Weight 0.2kg equipment monomer, 10 combination charger Jining Branch-Mining Equipment Co., Ltd. Contact: Lv