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ESCO Technologies Inc produces and supplies engineered products and systems for industrial and commercial markets worldwide It operates through Aerospace Defense Utility Solutions Group and RF Shielding and Test segments The Aerospace Defense segment designs and manufactures filtration products including hydraulic filter elements and fluid control devices used in commercial aerospace applications filter mechanisms used in micropropulsion devices for satellites and custom designed filters for manned aircraft and submarines It also designs develops and manufactures elastomericbased signature reduction solutions for US naval vessels and missioncritical bushings pins sleeves and precisiontolerance machined components for landing gear rotor heads engine mounts flight controls and actuation systems for the aerospace and defense industries The Utility Solutions Group segment provides diagnostic testing solutions that enable electric power grid operators to assess the integrity of highvoltage power delivery equipment and decision support tools for the renewable energy industry primarily wind and solar The RF Shielding and Test segment designs and manufactures RF test and secure communication facilities acoustic test enclosures RF and magnetically shielded rooms RF measurement systems and broadcast and recording studios and RF absorptive materials and filters active compensation systems antennas antenna masts turntables electric and magnetic probes RF test cells proprietary measurement software and other test accessories to perform various tests It also provides services such as calibration for antennas and field probes chamber certification field surveys customer training and various product tests The company distributes its products through a network of distributors sales reprESEntatives direct sales teams and inhouse sales personnel The company was incorporated in 1990 and is based in St Louis Missouri