Measurement range: 1 to 20 ppm Scale range: 1 to 20 ppm Suction count: 1 time (standard) Measurement time: (1 time) 2 minutes Temperature correction is available (described in the instruction manual) Detection limit: 0.2 ppm (1 time suction) Refrigerator storage Expiration date: 2 years from生产 受试者气体:乙醛 受试者气体:乙醛 上学期(年):2(标准) width(mm):147