Вопрос и ответ 441

Dear Sirs, I am interested in your products, especially in-line moisture meters to make "Measuring of burden raw material moisture on a conveyor" for agglomeration production. I would like to receive additional information on the possibilities of your sensors for solving this problem with approximate cost and equipment list. I am also interested in the ability to integrate your equipment with Siemens controllers.


According to operating principle, the device belongs to dielectric ones. As capacitive sensors, it measures permittivity of the substance and then determines the moisture using permittivity.

Unlike other dielectric devices, our instrument is also a radio device. It measures the absolute value of the permittivity. Moreover, not a narrow strip of material near the transmitter (ceramic plate) is analyzed, but a large amount of not less than 10 liters.

This is important since bulk material moisture typically is not uniform in volume. Also the moisture meter is used on lump materials with granular size up to 5 cm.

The device can be installed above the conveyor belt. However, there are changes of density (lumpiness) of bulk material and amount of air between the particles during belt movement. For any of moisture meter (except for optical) this leads to measurement errors.

Therefore if high accuracy is needed, we recommend to install the sensor in the hopper, dispenser, or at least in the tray in which the density of the material is more stable than on the conveyor belt.

Its output signals: digital MODBUS RTU and current 4-20 mA signals are simultaneously transmitted.

In your case of application to estimate the accuracy it is necessary to know the name of burden material and moisture measuring range.

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