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Soil Humidity Reader for Thin Substrates

Posts: 1029
Location: Northern Italy
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We've been using a 3-in-one pH, soil moisture, and light meter and while it's pretty approxamative it works well for us. It cost 14 euros and does the job.

We've recently ran into a problem in which our growing medium, which was once about 3 or 4 cm thick is now around 1 cm. To make matters worse, the meter has two prongs and can't fit into the container holes in the bottom.

We've found a meter more or less like ours with one prong, costing 40 euros. That could work.

We've also found this:

But I'm not sure if that would work, and it costs 140 smackers.

Anyone have any other ideas for reading soil moisture in very tight spaces?

Let's go to the waterfront with this tiny ad:
Greenhouse of the Future package (documentary, plans, and ebook)
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