... Controller temperature meter. humidity meter . CO2.VOC meter Wall Mount Transmitter / Controller ModelVAT620-CO2/XX-XX-XXVAT620-CO2-VOC/XX-XX ... :,(T90) <60s; Temperature and humidity: 1/e(63%)change ,Slow flow rates<10sVOC: 20m2 indoor, for 10ppm ethanol<1min,for flue ... :,(T90) <60s; Temperature and humidity: 1/e(63%)change ,Slow flow rates<10sVOC: 20m2 indoor, for 10ppm ethanol<1min,for flue ...