Key FeaturesMeasurement Range: Measures CO2 levels from 400 to 5,000 ppm (parts per million) and controls a range of 500 to 2,000 ppm.Daylight Photocell: Features a built-in photocell that automatically pauses CO2 release during dark or night cycles when plants do not process carbon dioxide.Adjustable Deadband: Lets users set a custom deadband to fine-tune system operation and prevent the constant switching that wastes bottled CO2.User-Friendly Interface: Provides clear readings and adjustments in 100 ppm increments.