Accurate pH 7 Soil pH & Moisture Meter
The Accurate pH 7 utilizes the electronic ground field effect of the earth on two dissimilar metals. No batteries are required. This meter comes with a cleaning pad. The Accurate pH 8 is a professional pH and Moisture Meter with 12 in Probe. This meter can measure pH and moisture at depths up to 12 inches. No batteries are required. This meter comes with a cleaning pad.