Evaluating the Depth of Water Medium Probing Using a Magnetic-Field Radiofrequency Probe Based on a Single-Layer Flat Coil

Abstract

The adequate depth of sensing the aquatic environment by a sensor based on a single-layer flat coil was studied. A radiofrequency sensor of the ~40–50 MHz range with a diameter of the sensitive element (a flat coil) of ~8 mm was used. Plastic cuvettes filled with distilled water placed in front of the sensor were used as the test medium, the number of which was sequentially increased. The frequency of the sensor was measured depending on the number of cuvettes placed in front of the sensor. The character of changes in the registered frequency of the sensor depending on the thickness of the aqueous layer selected as the medium was revealed.