The KEYENCE FS-N11MN is a compact fiber optic amplifier featuring an analog output design with an NPN output configuration for precise signal control in automation systems. Engineered for high-speed detection and stable performance, it enables accurate analog feedback for process monitoring and measurement tasks. The FS-N11MN is equipped with a cable connection for flexible installation within tight or dynamic machine layouts, supporting seamless integration with various sensor heads in the KEYENCE FS series. Weighing approximately 75 g, it offers a lightweight yet durable structure suitable for continuous industrial use. The KEYENCE FS-N11MN could potentially be implemented in North America, Europe, Asia, and worldwide manufacturing environments requiring reliable analog-output fiber amplifiers with NPN signal compatibility.