@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 "A compact and self-contained battery-powered CTD for use in coastal, estuarine and deep-water deployments to measure temperature and conductivity with depth. The whole unit is mounted in a stainless steel cage with battery pack, data logger and internal memory. The 25plus comprises an SBE 3F temperature sensor, SBE 4C conductivity sensor, and a strain-gauge pressure sensor. It utilises pump-controlled T-C ducted flow to minimise salinity spiking. The instrument may also be used with external power and data logging through an RS-232 interface, and offers channels for up to ten auxiliary sensors such as oxygen, pH, fluorescence, PAR, turbidity, light transmission and nitrates. The 25plus samples at 16 Hz and is suitable for use in water depths ranging from 600-6800 m. The SBE 25plus replaces the SBE 25 which was discontinued in 2012."@en ; sdo:inDefinedTermSet ; sdo:name "Sea-Bird SBE 25plus Sealogger CTD"@en ; sdo:termCode "SDN:L22::TOOL1162" .