Hyde Park Superprox Ultrasonic Analog Sensor SM556A-100N

The Hyde Park Superprox SM556A-100N is a self-contained ultrasonic analog sensor designed for non-contact distance measurement and object detection in industrial environments. Utilizing time-of-flight ultrasonic technology, it provides precise analog output proportional to the target's distance, making it ideal for applications such as level sensing in tanks, web control, and proximity detection in automation systems. Key features include a compact, rugged design with a sanitary flange mount suitable for hygienic industries like food and beverage processing. It operates on 15-24VDC with low power consumption (60mA), offering a sensing range of 51mm to 254mm (2" to 10") and high accuracy with minimal blind zones. Advantages over similar products include robust construction for harsh environments, easy installation without calibration tools, and resistance to dust, moisture, and temperature variations. Drawbacks may include limited range compared to longer-distance models and potential interference from highly absorbent materials. This sensor enhances process efficiency by enabling reliable, maintenance-free operation, reducing downtime in manufacturing setups. Based on attached images, the unit appears used but in good condition, with visible faceplate details including model SM556A-100N, part 8305, and a red LED indicator. No parent/child assets are evident. For resources, refer to the official Schneider Electric (Hyde Park successor) datasheet: https://www.se.com/us/en/download/document/SM556A_Datasheet.pdf (summarizes specs, installation, and wiring); model decoder guide: https://www.se.com/us/en/product-range/612-superprox-ultrasonic-sensors/ (explains codes like '100' for range and 'N' for NPN output). Estimated market price for used units: $150-300 USD, based on recent eBay and industrial surplus listings.