{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-11464215","patent":{"patent_number":"US-11464215","title":"Measurement apparatus for measuring a specific gravity of a liquid, and saltwater aquarium salinity control system","assignee":null,"inventors":[],"filing_date":"2019-03-18T00:00:00.000Z","publication_date":"2022-10-11T00:00:00.000Z","cpc_codes":["G01N","G01N","G01N","G01N"],"num_claims":8,"abstract":"A specific gravity measurement apparatus has a specific gravity hydrometer that carries a codestrip at the top. A linear optical encoder is disposed to view the codestrip and to output electronic signals that are indicative of a movement of the codestrip relative to said encoder. The movement is indicative of a change in the specific gravity of the liquid, such as a change in a salinity of the aquarium water in which the hydrometer floats. The measurement apparatus may be incorporated into a saltwater aquarium salinity control system where an electronic controller uses the measurement inputs to control a plurality of pumps for selectively adding saltwater or freshwater to the aquarium water in order to control the salinity of the water at a given setpoint level."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Measurement apparatus for measuring a specific gravity of a liquid, and saltwater aquarium salinity control system","description":"A specific gravity measurement apparatus has a specific gravity hydrometer that carries a codestrip at the top. A linear optical encoder is disposed to view the codestrip and to output electronic sign","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-11464215","license":"CC-BY-4.0-like","license_terms":"AI-generated analysis on this page (summary, layman_explanation, technical_analysis, business_analysis, faqs) may be reused with attribution and a visible link back to the canonical URL above. Patent abstracts, claims, and bibliographic data are USPTO public domain.","required_link":"https://patentable.app/patents/US-11464215","citation_suggestion":"Patentable. \"Measurement apparatus for measuring a specific gravity of a liquid, and saltwater aquarium salinity control system\" (US-11464215). https://patentable.app/patents/US-11464215","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-11464215","json":"https://patentable.app/api/llm-context/US-11464215","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T10:33:58.872Z"}