Detecting range: 0-100 ppm Dundamental Error: ≦?0.3+2%) for 0-10ppm ≦?% for 10-50ppm ≦?% for 50-100ppm Additive Error: ≦?% Alarming mode: Audible and visible signal Response Time: ≤40s Sensor life: ≥2years Battery type: 6F22.9V one battery Stand-by time of one new battery: ≥1000h