The REOTEMP Garden and Compost Moisture Meter is a heavy-duty moisture meter used by gardeners, composters, farmers, and nurseries to get a relative moisture level reading. The moisture meter’s unique calibration feature allows it to be used in a variety of applications including compost, gardening and soil moisture testing. Calibration allows for adjustment of the meter to the specific moisture needs of different plants and applications when compared to a non-adjustable meter.