Metal Detector Sensor Module | Non-Contact Detection

The Metal Detector Sensor Module detects metallic objects using electromagnetic induction. An oscillator coil generates a magnetic field, and any metal entering the 1cm to 6cm detection range disrupts that field, triggering a digital output change. The metal detector sensor runs on 3.3V to 5V DC and draws only 15mA, so it connects directly to Arduino or ESP32 without needing a separate power circuit.

The metal detector sensor arduino builds benefit from the module’s response time of under 0.5 seconds, which is fast enough for conveyor belt sorting at moderate speeds. A non-obvious detail is that detection range varies significantly by metal type. Ferrous metals like iron trigger the sensor from farther away than non-ferrous metals like aluminium or copper at the same distance. The module does not distinguish between metal types. The metal sensor detector also picks up interference from nearby coils or motors if mounted too close.

Makers, and small automation builders use the metal detector module in object sorting and proximity detection builds. Use Arduino IDE or MicroPython with a single digitalRead call on the signal pin. StemVolt provides this sensor with trusted quality, ensuring reliable performance and easy usability.

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