YSI INC

YSI INC specializes in the manufacturing, repair, and field support of precision environmental and industrial monitoring instruments, with deep expertise in water quality sensing, flow measurement, and oceanographic data collection systems. The company designs, deploys, and maintains advanced sondes, current meters, flow probes, and profiling systems used in field research and regulatory monitoring. Their technical capabilities include calibration, sensor integration, hardware installation, and on-site maintenance of complex instrumentation such as EXO2 sondes, Aanderaa current meters, and SonTek flow trackers, ensuring reliable data acquisition in challenging aquatic environments. A key differentiator is their hands-on field engineering support, enabling rapid deployment and troubleshooting for mission-critical environmental data collection. YSI INC maintains strong, recurring relationships with the Department of the Interior, delivering water monitoring equipment and repair services for federal land and water resource management. The Environmental Protection Agency and Department of Defense rely on the company for analytical laboratory instruments and field-deployable sensors to support water quality compliance and environmental surveillance. Additional engagements with NOAA, NASA, and the Smithsonian Institution reflect a trusted role in scientific research and marine observation programs. The contractor’s primary industry focus is in manufacturing instruments for measuring industrial process variables (NAICS 334513) and analytical laboratory equipment (334516), positioning them as a niche supplier of field-deployable environmental sensors. They serve the water resources, oceanographic, and environmental science sectors with specialized hardware tailored for regulatory, scientific, and defense applications. YSI INC is a small business structured as a 2L entity, headquartered in Yellow Springs, Ohio. While currently holding no formal government certifications, its longstanding presence in federal procurement and proven technical execution in environmental instrumentation underscore its credibility within the scientific and environmental contracting community.