To control the moisture content of bulk products of the mining and chemical industry it is preferable to use infrared and high-frequency methods, providing maximum sensitivity of the output parameter of the measuring instrument from the moisture content of the material.

Let at a distance d from a plane-parallel layer of thickness a with dielectric constant e a spherical conductor of radius g is placed, or a capacitor consisting of two such conductors located at a distance I from each other ...

High-frequency moisture meters have been successfully used to measure the moisture content of a number of beneficiation products. However, when measuring the moisture content of bulk materials having low goodness-of-fit (e.g., metal-containing cakes), there are difficulties in developing circuits that allow measurement of the electrical capacitance of the material under low goodness-of-fit conditions ...

The electrophysical characteristics of beneficiation products arriving at mining and processing plants from different deposits tend to be heterogeneous ...

In the course of long-term operation of continuous moisture-measuring systems developed at the Department of Automation of Production Processes of the Leningrad Mining Institute, a significant influence on their operation was found to be exerted by the wear of the base and working electrodes of the sensor. ...

When constructing temperature-compensation circuits in capacitive moisture-measuring systems, it is necessary to take into account that the change in the temperature coefficient of capacitance (TCC) of the material being monitored may have a different character depending on its moisture content. Besides this, the circuit must automatically change the temperature-compensation coefficient in accordance with the change in the TCC.

In a discrete moisture-measuring system of the F-meter type, the whole set of measurements of the capacitive component is brought to the calibration temperature in accordance with the temperature coefficient of capacitance of the material being measured...