The Panasonic SUNX FX-300 series digital fiber sensor is designed for reliable and consistent sensing in industrial environments. Key features include a four-chemical emitting element that suppresses changes in light emission over time, a control circuit for handling short-term fluctuations, and a double coupling lens that increases sensing range. The sensor is suitable for detecting the presence or absence of labels, ICs, and small objects, and its light-emitting amount can be adjusted to stabilize sensing without changing the response time. The FX-301-HS model offers an ultra-high-speed response of 35 µs, while the FX-305 model features a large 4-digit display for easy threshold setting. This sensor is ideal for applications requiring precise and stable sensing performance.