The electronic pH 8 precision uses the ground field effect of the earth on two different metals; the probe is 12 inches long for larger flower pots. Accuracy: ±0.2ph-suitable for agricultural field and teaching experiments. This meter can measure pH and moisture at depths up to 12 inches. No batteries are required. With special magnetic steel head, this pH tester guarantees measurement stability Usage: for measuring pH value and humidity different types of soils.
