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Measures: soil moisture tension
position it above your propagator
Anyone building a custom multi-size pipework setup
It's simple
no moving parts
G.A.S. Intelligent Humidity / VPD Controller Bulky Measures: soil moisture tensionG. A. S Intelligent Humidity VPD Controller Automatic Humidity Control Based on Real Plant Science Best for: growers who want their humidifier or dehumidifier switched automatically based on Vapour Pressure Deficit rather than a fixed humidity percentage. Our thoughts Most humidity controllers just hold a fixed relative humidity percentage. This one calculates VPD from both temperature and humidity together, which is a genuinely more accurate way to
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