This is the preferred choice when you are growing in the ground.

FieldScout Direct Soil EC Meter

• Professional-grade meter
• 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
• Includes battery and EC calibration standard
• Item 2265FS includes a carrying case