Review on 🌬️ Advanced 3-in-1 Indoor Air Quality Monitor with CO2/RH/Temp Data Logging and Audible Alarm - NDIR Sensor Technology by Sean Sheppard

I controlled the carbon dioxide levels with a timer. Which works well, but you have to keep an eye on it because of the variables. For example, plants use more CO2 as they get bigger by opening doors and running them every 15 minutes. This block keeps it within 50ppm and goes out along with the lights. This extends the life of my CO2 tank and the plants receive a constant level of CO2. I check it when I go into my grow room, but it's always where it should be. And the price was right.