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A couple of varieties are available. One with hard probes that penetrate the surface to varying depths. The
instrument then assesses the moisture between the probes and some sort of adjustment for type of material is generally needed. Another variety uses electromagnetic priciples to send
and receive signals through the material to provide a general level of moisture throughout the material in question rather then just between probe points.
The Lumber industry and wood finishing operations are interested in the amount of moisture in products
for kiln processing and p rior to other operations.
The construction industry is interested in the moisture content in concrete and block as well as testing for
moisture in wall construction to check for adequate ventillation, leaks, improper vapor barrier and prior to painting.
Of particular interest to the Agriculture segment is the amount of moisture present in stored and harvested
grains, silage and hay. This information effects storage and pricing. Models today are typically electronic with digital display. Some
produce readout in %moisture while others use a table of values which refer to specific moisture percentage. The units are generally available for under $250.
Even the home gardener may be interested in testing the moisture around plants to be sure the drainage is adequate and
the plants are getting enough moisture. Also, to tell when watering is needed.
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