This paper presents the development and experimental investigation of a magnetometer based on a parametric magnetic inductance sensor integrated into a self-oscillating LC circuit. The sensing element is a single-layer coil with a soft ferromagnetic core, whose inductance varies in response to an external magnetic field. This inductance modulation results in a shift in the oscillator frequency, enabling magnetic field measurements by tracking frequency changes. The proposed sensor architecture is compact, energy-efficient, and exhibits stable, repeatable, and monotonic response characteristics over a wide range of magnetic fields. Experimental testing using a calibrated solenoid confirms the device’s high sensitivity and minimal hysteresis. The proposed solution offers a cost-effective and digitally compatible alternative to conventional fluxgate magnetometer designs, with potential applications in industrial instrumentation, field diagnostics, and electromagnetic measurements.
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