Co2 meter question

What is a decent co2 ppm meter? One that just tells the ppm level of co2 in the air?
Thanks in advance

...greenair makes good ones. Mine has a light sensor that allows you to run co2 according to your photoperiod. co2 is only benefitial when the lights are on. Good luck.

does this controller you mention measure ppm and show you in lcd?

skilled4reel said:

does this controller you mention measure ppm and show you in lcd?

Click to expand...

yeap, sure does.