Banner QS18UNA is a compact ultrasonic distance sensor in the QS18U series that uses time‑of‑flight sensing to measure non‑contact distances from 50 mm to 500 mm. It operates on 12–30 V DC and provides a single NPN output, with a 4‑wire connection delivered via a 2‑meter flying‑lead cable. The housing is ABS and IP67/NEMA 4X rated for harsh industrial environments, and the standard version uses flying leads while the 4‑pin M12 quick‑disconnect variant is available as QS18UNAQ8 for plug‑in wiring.
