Sun Joe SJ-MMPH1 3-in-1 Soil w/Moisture, pH, and Light Meter $6.99 + Free Prime Shipping Thumb Score: 0 Link [amazon.com] 3 Modes: Moisture, light, pH Light Sensor: Measures light intensity levels, 0-2000 LUX Moisture Sensor: 7.9" copper probe for 10 moisture levels PH Sensor: 7.9" aluminum probe, 3.5-8pH scale Slickdeals Hot Deals Forum