Laboratory and on-line microwave moisture meters

MEASUREMENT OF SMALL MOISTURE BY THE MICRORADAR MOISTURE METERS

The MICRORADAR114 open l/4 resonator on-line moisture meter is designed for continuous moisture measuring in powders and granules, and provides measurements that are insensitive to sample preparation, including variations in bulk density. The devises sensor can be mounted in places of material free fall in pipes during flour transferring, above loading bunkers and other places. The complete set of delivery of the device includes the program of storage and displaying of moisture real-time, that allows to enter into the computer, to watch, to store and to print the information on moisture for any span.

The sensor is loaded with falling material and at regular intervals is unloaded with the help of compressed air 2-4 atm.

How The Meter Works

The sensor operates as a transmission mode, open resonator, which supports a simple TEM resonance mode. Coupling of energy between the test material and the sensor is via the fringing fields. These fields act as an effective capacitance and conductance, and determine the values of f and Q for the resonator, which in turn can be related to the moisture content of the material under test. Design features of the resonator reduce artifacts from environmental and extraneous conditions, such as positioning and vibration.

Product Specification

• Range1 of moisture measurement: 0-1,5%

• Range2 of moisture measurement: 0-0,1%

• Display resolution, in % moisture: 0.001%

• Accurate (1 SD) for Range1 ± 0.025%

• Accurate (1 SD) for Range2 ± 0.006%

• Ease of installation on-line

• Continuous measurement of moisture

• Stable calibration

• Dust and water protected to IP54 standard

MICRORADAR114. Main technical characteristics as applied to some materials

Material	Measurement range	Sensitivity	Accuracy (1SD)
Dry milk	2,0-7,0 %	0,01%	0,15%
Casein	5,0-14,0 %	0,01%	0,15%
Quartz sand	0-1,5 %	0,01 %	0,05 %
Apatite powder	0-3 %	0,01 %	0,1 %
Malt	1-6 %	0,01 %	0,15 %
Nifelin powder	0-3 %	0,01 %	0,1 %
Salt	0-0,25 %	0,001 %	0,005 %
Sugar	0,01-0,05 %	0,001 %	0,005%
	0,05-0,1 %	0,001 %	0,01%
	0,1-1 %	0,001 %	0,02%
	1-3 %	0,001 %	0,1%
Flour	10-17 %	0,1 %	0,2 %
Plastic powder very small density	0,01-0,1 %	0,001 %	0,003 %
Quartz dry sand	0-0,1 %	0,001 %	0,002 %
Alumina	0-0,3 %	0,001 %	0,003 %

Applying of our resonator moisture meters in the some industries

in production of ceramic tile

in production of sugar

in production of polymers

in production of milk powder