Universal CO2 MonitorVery affordable, and simply all you need to regulate CO2. This CO2 controller can accurately monitor room CO2 levels and turn CO2 regulators or generators on and off. The monitor is preprogrammed to turn devices on at 1300 ppm and off at 1500 ppm with overshoot already calculated. Instead of a costly digital readout, the HydroGEN CO2 monitor uses indicator lights to show approximate CO2 levels. Hydro Innovations uses a high quality, self calibrated,