The Angland Elteknik AB 13.33.20.200 AE 33202 K1 Preamplifier SA 55A SA 55 A/B is a proximity sensor designed for industrial automation and motion control applications. Specifically, the model SA-55A is known for its high-quality performance and reliability in detecting the presence and proximity of objects in various industrial settings. This preamplifier is a key component in ensuring accurate and efficient sensor readings, making it a valuable tool for businesses and industrial facilities looking to optimize their automation systems.