Involvement:Expert (understands the inner workings) - Ownership:more than 1 month
It works fine as indicator of your plant health. The humidity control work very well. The light measurement is cool, it works but is pretty useless if used in the pot. No batteries needed.
Cannot be calibrated. The prongs need maintenance. PH is the less accurate measurement. As time passes (with low maintenance) the PH measurement is even worste.
I have tested this product with a low PH buffer, a high PH buffer and a neutral PH buffer. It seems to work fine. The light sensor also works but is off-calibrated a bit. With your finger completly on it it stills measure a small amount of light.
As moisture sensor and PH indicator (not for real measurement) is perfect. It is better to buy more than one. If you keep inserting this into the pots, it will ruin the plant roots.
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