Garden Controls CO2 Controller is a grow room CO2 controller and carbon dioxide controller built to help maintain a target CO2 level by switching a CO2 generator or CO2 regulator on and off around a set point. This CO2 controller is designed for straightforward set point control, keeping the room’s CO2 level around your selected value for consistent environmental management. It features a set point range from 500 to 1500 ppm, giving you practical flexibility when dialing in a target CO2 level for your space. Because the control logic is purpose-built for CO2 level management, it keeps the experience focused on one job rather than layering in extra programming. Day only operation is built in, so CO2 control can be limited to daytime conditions without additional scheduling hardware. A built-in light sensor acts as a day/night detector to determine when the controller should run, helping keep operation aligned with lights-on periods while reducing unnecessary runtime during dark hours. This combination of day only operation and an integrated light sensor is a key reason growers choose a dedicated CO2 controller instead of trying to manage CO2 manually. For confidence at a glance, an output indicator light shows when the controller is supplying power to the output, making day-to-day monitoring simple. The design also includes a piggyback power/output cord, which keeps your CO2 device connected through the controller without adding extra components to your setup. Easy outdoor calibration is included as well, supporting reliable readings over time with a simple calibration approach that doesn’t require complicated tools. On the hardware side, the controller is rated for a maximum load of 12 amps and supports 120V equipment. Those practical electrical ratings make it a good fit for common indoor garden control setups that need a dedicated, purpose-built CO2 controller to manage a generator or regulator without overcomplicating the room. This is a good fit for growers who want a focused grow room CO2 controller with set point control, day only operation, a built-in light sensor day/night detector, and a clear output indicator light for simple, consistent CO2 level management. Specifications: CO2 Range: 500 - 1,500 PPM; Operation Settings: Day; Sensor Light: Day / Night; Maximum Ampage: 12 A; Input Voltage: 120 Volts.