Details: The Blueprint Digital CO2 Controller precisely controls a 120V CO2-generating device. The Controller allows CO2 set-points from 350-2000 ppm with an accuracy of ? 50 ppm. A remote sensor on a 15?? cable accurately monitors CO2 levels, and Fuzzy Logic mode allows even more precise control of CO2 levels when using compressed CO2. Photocell control with adjustable sensitivity allows the Controller to operate during the day, at night or continuously. The Controller is ETL listed and includes a three-year warranty.