... Dual window NDIRCorrespod timeCO2 :,(T90) <60s; Temperature and humidity: 1/e(63%)change ,Slow flow rates<10sVOC: 20m2 indoor, for 10ppm ethanol ... protocolModbusPower consumption5W maximum average 3.5WWarm-up time2 minutes, and for the first time 2 hoursUse environment-10—50degree, 0--95 ... environment-40—70degree,0 --95%Size135*91*36mm co2 controller in door air quality monitor and controller VAT920