Sartorius LMA316PA Betriebsanleitung Seite 136

WLM6009-a10081
Microwave resonance procedure
A moisture measurement method which is based on the measurement of two independent
parameters correlated with moisture and density and on the movement of a resonance frequency
and the dampening of the resonance peak.
It involves moving a product loaded with water into a resonance field. The water acts on the field
and the field changes are measured and subjected to mathematical calculations.
Moisture measurement technology
Sartorius devices were developed to determine material moisture in solid products.
The microwave resonance method has particular advantages here, such as speed, colour and
density independence, precision, ability to determine core moisture, and independence from
surface effects.
Packing density
The measurement devices work independently of the density/layer density of the product.
There is no need to weigh the product.
Planar sensor
The slider-shaped planar sensor is used for inline process checking with the
PMD320PA/PMD325PA. It can be integrated into a conveyor belt hand-over section, a silo wall,
or a shaker trough. The product must directly cover the sensor.
Sensor
Hollow sensor or fork-test bar for laboratory applications or planar sensor (see above)
Surface effects
The microwave resonance method works independently of the structure, colour, and granularity
of the product surface.
It is important that the product crosses the measuring field evenly.
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LMA316PA / LMA321PA - Glossary