This top secret do not tell any humans!
Depending on the room size of you breath while working in the room it will go up.
Depending on where the A/C come in and where the co2 head is at it will go up.
I have seen it go up to 1400 while working in room with the co2 tanks not even in the room. Relax and look at the total picture.
oldsanclem Reviewed by oldsanclem on . CAP PPM-3 problems I recently got a ppm-3 and immediately noticed that it was not always shutting off the solenoid valve on my co2 tank after the relay point (1600 ppm) had been reached. It just kept going up until about 4,500 ppm until i noticed and restarted it. It goes for about 3-5 hours of correctly shutting off the valve and then eventually it will glitch and keep the valve open. now i have a seperate issue. originally the co2 ppm in my room was 900 at base level. outside on my lawn between trees Rating: 5