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The Bluelab Soil pH Pen is a handheld pH and temperature meter with a spear-tip probe for reading pH directly in soil, coco and other media.
Instead of testing runoff or making up a slurry sample, the spear probe goes into the medium itself, so the reading comes from the root zone the plant is working in. The pen is fully waterproof and the probe is replaceable, so it can be renewed without replacing the meter. Calibrate with Bluelab pH solutions and store the probe in KCl storage solution.
Best suited to soil, coco and potting-mix growers who want root-zone pH without a runoff test.
