Product Description 
 BMK-Ⅱ portable coal gas can be explosive detector (hereinafter referred to as the measured burst instrument), is used coal underground mining, intrinsically safe and flameproof portable equipment. The explosimeter instrument used in coal mine by the mine rescue team members carry into the disaster area to monitor the operating environment surrounding gas group whether there is a risk of explosion. To carry, but also by the staff of fire extinction in the treatment of spontaneous combustion or unsealing a fire area, the detection of the surrounding environment or confined within the methane in the air, the oxygen concentration directly on the instrument LCD display shows the concentration of O2, CH4, CO and ambient temperature, and shows the coordinates of points, composed in "explosion triangle graphics and gas group close to or reach the warning limit instrument at the same time sound and light alarm. 
 Technical parameters 

 Gas range error Remarks 
 O2 3% ~ 21% ± 10% 
 CH4 0.5% to 25% ± 10% 
 CO 0 ~ 999 × 10-6 ± 10% 
 Temperature 0 to 75 ℃ ± 2 ℃ 
 Dimensions 170 mm × 124 mm × 43 mm 
 Mass of about 1.4 kg