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Unlike CO2 meters designed for plant growing, these specialty controllers keep carbon dioxide levels low, so that your fruiting mushrooms grow and look great. Simply set the desired CO2 level with the built-in controls, and the meter will automatically turn on any connected device* (e.g. an exhaust fan) when the CO2 is too high. When the CO2 level drops below the target, the connected device is turned off.
Available in two sizes: Small for a single space, Large for monitoring two spaces at once. See the Specifications tab for details on differences between the models.