GJC4 type mine explosion methane sensor methane sensor methane gas sensor fixed sensing Mine is to meet China's coal mine gas monitoring needs of developed and it can continuously and automatically converted into the underground methane concentration standard electrical signal transmission to the associated equipment, and has a local display gas concentration, alarm sound and light gauge and power-off function. proof tested by the state authorities for online examination, can be used with various types of monitoring systems and domestic power meter, wind power and gas locking device supporting, suitable In the coal mining face, electromechanical chamber, back to the wind tunnel and other locations stationary use. Main Specifications Measuring range: 0 ~ 4.00% CH4 basic measurement error: 0.00 ~ 1.00% CH4 ± 0.10% CH4 1.00 ~ 2.00% CH4 ± 0.20% CH4 2.00 ~ 4.00% CH4 ± 0.30% CH4 Display: four red LED Display Function Display: 1 - Zero China; - adjust sensitivity; 3 - tone alarm point; 4 - adjust the power point; 5 - After three self: Measurement value display (% CH4) output signal: signal with a load capacity: 0 ~ 400Ω Alarm: two intermittent sound and light alarm sound intensity> 85dB, light intensity: visibility> 20m alarm range: 0 ~ 4% CH4 continuously adjustable power point settings: as 0.50,0.75,1.00 respectively , 1.25,1.5,2.0% CH4, respectively, corresponding to complex electrical power point limit point can be set within the range 0-3% CH4. Sampling Method: Diffusion type; element detection response speed: <30S thermo-catalytic component life: One year intrinsically safe parameters: a) μi: 18V (DC) Ii: 70mA b) Ci: 0.08μF li: 0mA Operating voltage: DC9-24V ; Working current: ≤ 85mA Explosion-proof type: Mine intrinsically safe and flameproof; proof mark: ExibdI Dimensions: 190 × 114 × 57, Weight: 700g Jining Branch-Mining Equipment Co., Ltd. Contact: Lv