Proximity Sensor | 4mm Detection Switch | DC 10-30V NPN/PNP NO/NC

The SN04 is an inductive sensor for finding metal without touching it, used in automation. It reliably senses ferrous metals up to 4mm away. This sensor runs on 10-30V DC power, so it works with many control systems, including PLCs and microcontrollers. Features and Benefits - 4mm sensing distance - Gives a clear area for finding positions or for limit-switching jobs. - NPN and PNP models available - Pick the output type that fits your system's logic (sinking for NPN, sourcing for PNP). - Built-in LED status indicator - It lights up when it finds metal, making it easy to see if it's working. - IP67 rated housing - Keeps the inside parts safe from dust and water, so it works in workshop settings. Applications - Acting as an end-stop or homing switch on a 3D printer or CNC machine. - Counting metal parts or products as they move along a conveyor belt. - Finding the position of a tool in an automated machine or confirming a metal guard is closed. What It Is This is an inductive proximity sensor, designed for industrial use. It detects the presence of objects without physical contact, using electromagnetic fields. The sensor operates with a DC voltage between 10-30V, falling below the EU LVD voltage limits. It has a 4mm detection distance. This electronics module is available in various models (SN04-N, SN04-N2, SN04-P, SN04-P2), offering NPN or PNP output types and normally open (NO) or normally closed (NC) output states. Key Uses & Applications This 4mm proximity sensor is ideal for automated systems where precise, non-contact detection is crucial. Common applications include position sensing, counting parts on a production line, and detecting the presence of metallic objects in machinery. Its 4mm detection distance makes it suitable for tasks requiring close-range sensing. The NPN/PNP and NO/NC options provide versatility for integration into different control circuits. To test a proximity sensor, apply the specified voltage and observe the output change when an object enters its detection field. How to Choose When selecting this proximity sensor, consider the required output type and state for your application. Choose NPN or PNP based on your control system's input requirements, and NO (normally open) or NC (normally closed) depending on whether you need a signal when an object is present or absent. Verify the operating voltage of 10-30V DC is compatible with your power supply. The 4mm detection distance is fixed, so ensure this range meets your specific sensing needs. This industrial sensor is not an optical sensor, which detects light.