@prefix cpm: . @prefix dc: . @prefix dcat: . @prefix dce: . @prefix dct: . @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 semapv: . @prefix skos: . @prefix sssom: . @prefix void: . skos:member . skos:related . skos:narrower . skos:narrower . skos:related . skos:altLabel "GeoSpectrum M8E-51" , "GeoSpectrum M8E-51"@en ; skos:broader , ; skos:definition "A high-frequency omni-directional hydrophone and sound projector for use in the marine environment. It comes with a pre-amplified output of 0 to 35 dB (selectable on order) with current or voltage signalling. It has a diameter of 22 mm and length of 88 mm (single package). It is depth-rated to 200 m and can operate at temperatures between -40 and +70 degC. Its voltage sensitivity without pre-amp is -200 +/- 1.5 dBV re 1uPa, and -165 +/- 1.5 dBV re 1 uPa with pre-amp. Its lowest resonance frequency is 170 kHz and capacitance is 1.4 nF +/- 20 % at 20 degC."@en ; skos:inScheme ; skos:notation "SDN:L22::TOOL1659" ; skos:note "accepted"@en ; skos:prefLabel "GeoSpectrum M8E-51 hydrophone"@en ; skos:related , . skos:narrower . skos:related . skos:narrower . skos:related .