Here is a handy tip if you use our RAD-0501 Day Night CO2 Monitor & Controller for Greenhouses and Grow Rooms and want to get the maximum benefit from increased CO2.
Most growers who use CO2-enrichment suggest for maximum accuracy, the CO2 sensor in the controller should be at the same height as the top of the foliage. So instead of permanently mounting the controller, make an adjustable mount that lets you quickly raise the controller as your plants grow.
To do this, all you need is a 1x10 in. by 6 ft. board - available at the local lumber yard for under $10 dollars. Starting at the height of your grow bed, hammer two 8-Penny (2-1/2 in.) finish nails (no heads) about 7.5 inches apart at the same distance from one end of the board. Test fit that the controller hangs squarely on the board between the nails. Use a hammer to bend the nails up slightly so the controller won’t fall off the board when it is standing upright.
Once you have your first pair of nails in, duplicate them every 6 inches up the board to the top. Finally, mount the board to the wall of your grow room, or make it stand-alone by creating a base with a gravel-filled bucket or scrap lumber.
To finish the project off, pick up a flexible tape measure at any sewing supply store for under $5 dollars and nail it to one edge of your board so you can record your plant’s growth over time.