Window Reed Switch | Proximity Sensor with 30cm Wire | PS-3150 NO

This PS-3150 reed switch sensor is a complete, ready-to-install proximity sensor. It includes the wired switch and a magnet, each in its own plastic housing. Since it's a Normally Open (NO) device, the circuit is open by default. It only closes when the magnet is right next to the switch. Features and Benefits - Pre-wired with 30cm leads - The attached wires mean you don't have to solder. This makes connecting the sensor to your security system or Arduino project faster. - Surface-mount housing - Both the switch and magnet have mounting tabs with screw holes. You can easily install them on a door, window, or cabinet. - Complete magnetic switch set - You get both the wired reed switch and the magnet. This gives you everything you need for a magnetic door contact switch setup. - Normally Open (NO) setup - The circuit completes when a door or window is closed. This is a common way for security systems to confirm an area is secure. Applications - Good for door and window alarm sensors for a home or business security system. It detects when someone tries to enter. - Connect it to a microcontroller to make smart home automations. For example, turn on closet lights when the door opens. - Build a safety interlock for machinery. It stops the machine from running unless a protective guard is firmly in place. What It Is This is a Window Reed Switch, also known as a proximity sensor, designed for use as a magnetic door or window contact. It functions as a Normally Open (N/O) reed switch sensor. A proximity sensor works by detecting the presence or absence of an object without physical contact. In this case, the reed switch operates when a magnet (not included) comes within close proximity, closing the circuit. This particular model comes with a 30 cm wire for connection. Key Uses & Applications The PS-3150 NO Window Reed Switch is primarily used for proximity magnetic door and window contacts. Its Normally Open (N/O) configuration means the circuit is open by default and closes when a magnet is brought near. This makes it suitable for security systems to detect open doors or windows, or in automation to trigger actions when a window or door is closed. As an industrial sensor, it can also be integrated into various electronics module setups requiring simple, contact-free sensing over short distances. How to Choose When selecting a proximity sensor like the PS-3150 NO, consider its application. This reed switch is Normally Open, meaning it completes a circuit when activated. To test a proximity sensor, you would typically use a multimeter to check for continuity across its wires as a magnet is brought near. Ensure the 30 cm wire length is sufficient for your installation. If you require a different sensing range than a standard reed switch offers, you might consider other types of industrial sensor, such as an optical sensor, which can detect objects over different distances.