Buy Autopilot APC8200 Monitor & Controller, Remote Sensor, Blue: Indoor Gardening & Hydroponics - Amazon.com ✓ FREE DELIVERY possible on eligible purchases
I'm selling a nearly new, perfect condition CO2 monitor and controller purchased from amazon above!
$210 including shipping, I bought it for $270! Used for half a grow cycle before I gave up on using CO2 in a 2x4 tent... lol. If you'd like to buy it i'd be happy to send pictures of the device working, and I can set up an ebay order for secure purchase.