Banner Engineering SM31EMLQD Photoelectric Sensor

The Banner Engineering SM31EMLQD Mini-Beam through-beam emitter is a compact 10–30 V DC infrared light source that pairs with Banner Mini-Beam receivers to form a complete through-beam sensing pair, delivering a bright 880 nm beam for reliable object detection in industrial environments. Housed in a thermoplastic, rectangular enclosure with an 18 mm optics barrel and M18 mounting capability, the emitter is encapsulated for rugged use and features an integral 4‑pin M12 quick-disconnect connection for easy wiring. It operates in opposed-emitter configurations, supports a wide operating temperature range of -20°C to 70°C, and carries IP67 and NEMA 4X ratings for dust, water, and harsh conditions; a status LED provides power indication, and an adjustable potentiometer helps fine-tune performance. The long-range QD variant is designed to achieve up to 30 m (about 100 ft) in favorable conditions when paired with compatible receivers such as the SM3IR family, with actual range depending on alignment, receiver, and environment. This model is listed by Banner as obsolete, with guidance to consider replacement options from Banner or authorized distributors.