The Moisture Meter gives you the moisture content of your compost pile or soil sample by means of a sensor at the bottom of the probe. The probe is sensitive only at the tip. Calibrate the instrument by inserting the tip into a saturated sample of compost or soil and setting the needle on scale to 10. Then insert your Moisture Meter into the medium at the depth you want to measure and a relative moisture content will be derived instantly. The meter is sensitive to changing salt content and can be used to track leachate as well as give you moisture content. Used by composters, farmers, and nuseries across country.