0 ~ 25% (minimum full range of 0-1000 ppm) 0 ~ 300000ppM + (calibration) Sensitivity 0.5% (full scale) (minimum resolution of 100 ppm) Accuracy accuracy +/- 3% (full scale) (at normal temperature and pressure) Usage temperature using temperature ℉ 50 ~ 122 (10 ~ 50 'C) Response Time Response time 90% 5 ~ 35s Repeatability Repeatability +/- 1% (at room temperature) Sensor type sensor types A-3/A-5 (United States imports original) (90% of full scale response time 30 seconds . application% O2 . CO2 . CH4 . CO . NO . and other acidic gases from the environment) Charging Power Supply Power 220V 50/60Hz 100-115V 50/60Hz (optional)