The Only Moisture Sensor Meter You'll Need Easy To Use Inset the probe of the meter to the plants' root level Note moisture level in the dial which has ten scales Remove probe from soil and wipe clean after each use Tips Avoid hard stones when inserting probe as they may damage the probe Never put this meter into water. For some very loose soil, the reading may be inaccurate Don't leave it in the soil for more than an hour for use Ask any professional gardener or landscaper and they'll tell you: a high quality, stainless steel dial soil thermometer delivers more accurate readings than a digital soil thermometer. You also don't need to worry about fragile components or battery life. Gift shopping for a gardening enthusiast? They'll love our garden soil thermometer – perfect garden gift for birthdays, anniversaries, and holiday occasions.