ndir gas sensor for coal mines

{"cid":"91211450","title":"YJJ Mipex-02-3-I-1-1A (40) NDIR Non-dispersive Infrared Optical Gas Sensor for Coal Mines","imgUrl":"https:\/\/img.chinax.com\/nimg\/5e\/47\/790edfeaa4e87f943393125652e1-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"YJJ","Model Number":"Mipex-02-3-I-1-1A (40)","Minimum Order Quantity":"1","Delivery Time":"5-8 days","Place of Origin":"CHINA","Payment Terms":"L\/C, D\/A, D\/P, T\/T, Western Union, MoneyGram","Supply Ability":"2200","Packaging Details":"Box pack","Measurement of gas":"Methane CH\u2084","Measurement range":"0 - 40% VOL","Measurement accuracy":"\u00b10.2% VOL","Resolution":"0.01% VOL","Linearity":"<1% FS","Cross-interference":"Low interference","Preheating time":"\u2264120s","Response time T90":"\u22645s"}}

{"cid":"91188394","title":"On - Line Coal Gas Analyzer KGD - MQ - 521 For On - Line Measurement Of Gas Volume Concentration.","imgUrl":"https:\/\/img.chinax.com\/nimg\/74\/16\/c9c512810c7ede9f7dd2341af03b-200x200-1.jpg","attrs":{"Brand Name":"KACISE","Model Number":"KGD-MQ-521","Minimum Order Quantity":"1PCS","Delivery Time":"5-8 work days","Certification":"CE","Place of Origin":"CHINA","Payment Terms":"L\/C,D\/A,D\/P,T\/T,Western Union,MoneyGram","Supply Ability":"1000 Piece\/Pieces per Week negotiable","Packaging Details":"each unit has individual box and all boxes are packed in standard packages or customers requests available","Measurement Component":"CO\/CO2\/CH4\/H2\/O2\/C2H2\/C2H4\/CnHm*\/Calorific Value","Measurement Principle":"CO\/CO2\/CH4\/C2H2\/C2H4\/CnHm: NDIR; H2: TCD; O2: ECD","Measurement Range":"CO\/CO2\/CH4\/H2: (0~100)%; O2: (0~25)%; C2H2\/C2H4\/CnHm: (0~10%) (Optional)","Measurement Accuracy":"CO\/CO2\/CH4\/H2: (0~100)\u00b10.25%; C2H2\/C2H4\/CnHm: (0~10)\u00b10.25% (Optional)","Linear Error":"CO\/CO2\/CH4\/C2H2\/C2H4\/CnHm: \u00b11%F.S.; O2\/H2: \u00b12%F.S.","Resolution":"0.0001"}}