@prefix cpm: . @prefix dc: . @prefix dcat: . @prefix dce: . @prefix dct: . @prefix dcterms: . @prefix grg: . @prefix iop: . @prefix ns0: . @prefix ns1: . @prefix owl: . @prefix pav: . @prefix prov: . @prefix puv: . @prefix qudt: . @prefix rdf: . @prefix rdfs: . @prefix reg: . @prefix sdo: . @prefix semapv: . @prefix skos: . @prefix sssom: . @prefix void: . @prefix xsd: . rdf:type sdo:DefinedTerm ; sdo:description "An early water level sensor comprising a seabed-mounted gas outlet and a manometer to measure the compressed gas pressure necessary to force gas through this outlet. The manometer comprised a stainless steel float in a tube that was connected through pulleys to a clockwork chart recorder. Chart advance speed was 2.5, 5, 10 or 20 mm/hour (10 mm/hour was generally used for tidal measurements) and pressure ranges corresponding to depth scales of 0-3m, 0-6m, 0-9m, 0-12m or 0-18m were available. More information may be found in http://www.bodc.ac.uk/data/documents/nodb/27190/" ; sdo:inDefinedTermSet ; sdo:name "Neyrpic bubbler pressure gauge"@en ; sdo:termCode "TOOL0610" .