Metal Detector Sensor Module (3–5V) – Arduino Compatible
The Metal Detector Sensor Module is a compact electronic sensing device designed to detect the presence of metal objects without any physical contact. It operates within a low voltage range of 3–5V DC, making it fully compatible with Arduino and other common microcontroller platforms. The module is simple to use and provides a clear digital output signal, allowing it to be easily integrated into automation, sensing, and detection projects.

Product Description
This sensor module is specifically designed for reliable metal detection in embedded systems. It outputs a digital HIGH or LOW signal when a metal object enters its sensing range, enabling straightforward interfacing with microcontrollers. Due to its low power requirements and compact form factor, the module is suitable for both portable and fixed installations. It is ideal for beginners as well as advanced users who require a simple yet effective metal detection solution.

Working Principle
The module operates using inductive sensing technology. It generates an electromagnetic field around its sensing area, and when a metal object approaches, this field is disturbed. The internal circuitry detects this change in the electromagnetic field and processes it into a digital signal. This signal change indicates the presence or absence of metal near the sensor.

Key Features
The module operates on a wide voltage range of 3–5V DC, ensuring compatibility with various microcontroller boards. It provides a digital output signal that switches between HIGH and LOW states upon metal detection. An onboard potentiometer allows users to adjust the sensitivity according to application requirements. The module is easy to interface with Arduino and similar development boards, and its compact, lightweight design makes it suitable for space-constrained projects.

Applications
This metal detector sensor module is commonly used in DIY metal detection projects for learning and experimentation. It is suitable for robotics and automation systems where metal presence detection is required. The module can be used in object detection and sorting systems, as well as in educational and training kits for teaching sensor principles. It is also applicable in basic industrial presence sensing applications where non-contact metal detection is needed.