UA18CAD09PKTI is a diffuse ultrasonic sensor designed for precise distance measurement, level detection, and diameter measurement applications. The sensor features a 100–900 mm rated operating distance with a blind zone of =100 mm, 0–10 VDC analogue output, and a PNP digital switching output configured for window detection. It incorporates microprocessor-based digital filtering for immunity to electromagnetic interference, achieving 0.5% repeatability and 1% linearity error with a ±7° beam angle. The M18 PBT cylindrical housing provides IP67 protection, operates on 15–30 VDC supply, and is available with either a 2 m PVC cable or M12 4-pin connector. This sensor is ideal for industrial automation, process control, and measurement systems requiring reliable, accurate distance sensing with integrated analogue and digital outputs.