... ; Temperature and humidity: 1/e(63%)change ,Slow flow rates<10sVOC: 20m2 indoor, for 10ppm ethanol<1min,for ... Temperature and humidity: 1/e(63%)change ,Slow flow rates<10sVOC: 20m2 indoor, for 10ppm ethanol<1min,for ... flue gas<5minAlarmSound and light alarmDigital signal outputStandard: NoOptional: ... --95%Size135*91*36mm CO2 meter CO2 monitor and controller VAT810