@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 "In-situ nutrient analyzer for high-frequency time-series determination of nutrient concentrations in marine and fresh waters. It uses a pump and valve system to acquire and react individual water samples, and versions are available for the measurement of nitrate, phosphate, silicate and ammonia. The NAS-3X replaces the NAS-2E, providing higher precision and resolution measurements. The standard depth rating is 100m, although a 250m version is also available and deeper versions may be built on request."@en ; sdo:inDefinedTermSet ; sdo:name "EnviroTech LLC NAS-3X Nutrient Analyser"@en ; sdo:termCode "SDN:L22::TOOL0380" .