| 摘要 |
The invention relates to apparatus monitoring the deposition of a liquid-to- pasty medium on a substrate and comprising at least one sensor fitted with two electrodes which are configured at a given, slight distance from the substrate surface and which apply an AC voltage to the substrate and medium, the substrate moving relative to the sensor, further comprising a test electronics connected to the sensor and emitting a signal which is characteristic of the substrate together with the medium. This problem is solved in that the apparatus measures the imaginary component of the substrate together with th e medium between the two electrodes and thereupon the test electronics uses this measured value to determine the characteristic signal.
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