2x14mm Magnetic Sensor | N/O & N/C Reed Switch | MKA14103 & GPS-14B Types

This reed switch is a small magnetic sensor. It opens or closes an electrical circuit when a magnet is nearby. The contacts are sealed inside a 2x14mm glass tube. This protects them from dust and moisture. We have both Normally Open and Normally Closed types available. You can pick the one that fits your project. Features and Benefits - Normally Open (NO) or Normally Closed (NC) versions - Choose NO to complete a circuit with a magnet. Pick NC to break a circuit. This gives you the right logic for your design. - Sealed glass enclosure - This keeps the internal contacts safe from dirt and rust. It helps the switch work consistently over time. - Small 2mm x 14mm size - This tiny reed switch fits into small spots. It's good for hidden installations in compact devices. - Sensitive to magnetic fields - It responds quickly and clearly to a magnet. This makes it a good choice for security systems. Applications - Making a simple door or window alarm for a home security setup. - Creating non-contact limit switches for 3D printers or CNC machines. - Sensing the position of moving parts in custom robotics or electronics projects with Arduino. What It Is This product is a magnetic sensor, specifically a 2x14mm reed switch available in Normally Open (N/O) and Normally Closed (N/C) configurations. It operates using magnetic induction, meaning it detects the presence of a magnetic field without physical contact. These are types MKA14103 and GPS-14B. They are suitable for low voltage applications, rated for below 50 Vac or 75 Vdc. Proximity sensors like these are fundamental components in various electronic modules, detecting objects within a short range. Key Uses & Applications These magnetic sensors are widely used as proximity sensors in industrial and domestic settings where non-contact detection is required. Common applications include: - Security systems for door and window contacts. - Position sensing in automation and machinery. - Level sensing in fluid containers. - Limit switches in small mechanisms. Their compact 2x14mm dimensions make them suitable for integration into tight spaces. As barrel sensors, they can be easily mounted in various setups. How to Choose When selecting this magnetic sensor, consider the required switch type: Normally Open (N/O), where the circuit is open until a magnetic field is present, or Normally Closed (N/C), where the circuit is closed until a magnetic field breaks it. Verify the voltage rating of below 50 Vac or 75 Vdc matches your application. To test a proximity sensor, you can typically use a multimeter to check continuity, observing the change in state (open to closed or vice versa) when a magnet is brought within sensing range. Consider the quantity needed, available in 5 to 50 pieces.