The best cheap sensor setup for relative humidity in hydroponic automation projects
I have written in the past about humidity in hydroponics, especially how accurately measuring humidity is hard due to problems with the sensors. In my experience during the past 5…
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Calibrating your digital humidity sensors
On a recent post I talked about vapor pressure deficit and its importance in hydroponic culture. To adequately control VPD it’s necessary to accurately measure relative humidity and in order to do…
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Vapor pressure deficit (VPD) in hydroponics
If you have read books or articles about greenhouse environmental control you have probably heard about Vapor Pressure Deficit, also known as VPD. This is an important variable to measure…
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