GRAIN MOISTURE METER Each meter is highly accurate, displays results within seconds, may be used in a variety of soils, and is unaffected by temperature, pH, dissolved salts, or metallic ions. Simply insert probe at least six inches into reasonably soft, moist area and press appropriate test button. Results appear quickly. Rapidly perform multiple tests at various depths and locations. Just wipe off probe after each test. Features 30 " stainless steel probe, clay, loam and sand scales printed on meter’ s face panel, and soft foam handles. Informative user’ s guide and 9V battery included. Operating temperature: 40° F to 150° F. Power: 9V battery ( included) . Battery life ( approx.) : 3 months. Probe length: 30 " . Overall length: 36 " . Weight ( approx.) : 5 lbs. Aquaterr EC-300 Digital Soil Moisture, Temperature and Salinity Meter Displays soil moisture percentage, soil temperature ° F, and soil salinity cS/ m. Soil Moisture - Range: 0 to 100% . Accuracy: ± 2% . Response time: 3 sec. Soil Temperature - Range: 40° F to 150° F. Accuracy: ± 1.5° F. Response time: 60 sec. Salinity: Range: 0 to 100 cS/ m* . Accuracy in water: ± 2 cS/ m* . Accuracy in soil: ± 10 cS/ m* . Response time: 5 sec. * centi-Seimans/ meter; 10 cS/ m = 1 mmho/ cm2.