No need to prepare samples – simply sample through the profile. Patented paired sensor tip provides maximum soil-sensor contact and higher accuracy. Sample directly in plug trays, pots, containers, solutions, or ground soils • 0 to 19.9 mS/cm (Accuracy ±1%, resolution 0.01 mS/cm). Automatic temperature compensation, long lasting, and waterproof. Includes battery and EC calibration standard.