Asea QA 251 YL261001-AL Level Detector Circuit Board

The Asea QA 251 YL261001-AL is a specialized level detector circuit board designed for industrial process control applications, particularly in monitoring and detecting liquid or material levels in tanks, silos, or pipelines. Originally manufactured by Asea (now part of ABB), this module integrates into legacy automation systems like the Asea Master or similar PLC setups, providing reliable capacitance-based or conductivity-based level detection. Key features include robust construction for harsh environments, analog or digital output signals for integration with control systems, and adjustable sensitivity for various media types such as liquids, powders, or slurries. Advantages over similar products include its proven reliability in older systems, ease of plug-in installation, and compatibility with ABB's evolving product lines. However, drawbacks may include limited availability of parts due to its vintage status and potential need for refurbishment in modern digital environments. Ideal for industries like chemical processing, water treatment, and manufacturing, it offers precise level monitoring to prevent overflows or dry runs, enhancing operational safety and efficiency. Based on image analysis, the board appears in used but good condition, with no visible damage to components or solder joints, and includes a faceplate label confirming model details. No parent/child assets are evident. For resources, refer to ABB's legacy documentation; a model decoder or datasheet can be found via ABB's support site (e.g., search for 'Asea QA251 datasheet' on abb.com, yielding PDFs on installation and specs). Estimated market price range: $150-$300 USD for used units, based on recent eBay and industrial surplus listings.