2 signal value month hydrogen sensor

{"cid":"91211450","title":"Long-Term Stability 4H2-1000 Classic Line Hydrogen Sensor 0-1000 ppm with 10 ppm Resolution and 2% Signal Value\/Month","imgUrl":"https:\/\/img.chinax.com\/nimg\/84\/22\/6017c473327a64ef349eaba94cbc-200x200-1.jpg","attrs":{"Model Number":"4H2-1000","Minimum Order Quantity":"1","Delivery Time":"3-5 work days","Payment Terms":"L\/C, D\/A, D\/P, T\/T, Western Union, MoneyGram","Product model":"CLE-0613-400","Range":"0 to 1000 ppm","Maximum load":"2000 ppm","Resolution":"10 ppm","Long-term stability":"< 2% signal value\/month"}}

{"cid":"91191786","title":"Hydrogen Fluoride Gas Detector 0 . 01PPM Resolution 2 - 3 Years Sensor Life","imgUrl":"https:\/\/img.chinax.com\/nimg\/c4\/9a\/def4083556fccddc4dc20d7419a9-200x200-1.jpg","attrs":{"Brand Name":"EYESKY","Model Number":"ES10B11-HF","Minimum Order Quantity":"1","Delivery Time":"1-2DAYS","Certification":"CE\uff0cROSH\uff0cFCC\uff0cSIL","Place of Origin":"CHINA","Payment Terms":"L\/C, D\/A, D\/P, Western Union, MoneyGram","Sampling methods":"Diffusion or pump-suction selectable","Precision":"\u2264\u00b13%F.S","Repeatability":"\u2264\u00b11%","Zero drift":"\u2264\u00b11%(F.S\/year)","Sensor Life":"2~3 years","Response Time (T90":"\u226420s","Alarming":"Sound and light alarm","Explosion-proof Index":"Ex d IIC T6","Protection Grade":"IP66","Electrical Interface":"3\/4\u2033NPT(Female Screw),1\/2\u2033NPT(Female Screw)"}}