Any Reviews with this product? Hydrogen c02 monitor

[Merfolk]

http://www.n-g-w.com/ngw/gardening_...=Environmental Controllers / C02&type=product

Any Suggestions ?

 

[muddywaters]

my friend run's one like that and it works well. if you go with that one you can get it alot cheaper if you look around.
http://www.growwurks.com/hydrogen-co2-monitor.aspx

i run a Sentinel CPPM-1 CO2 Controller and like it alot, its a lil more pricey tho.