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Accurate reference for the calibration of seawater refractometers, hydrometers & other density measuring equipment. 35 ppt Salinity. 1.0264 Specific Gravity. 1.3394 Refractive Index. 53 uS/cm at 25 deg c. Made in the USA.
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🇺🇸 Ship from USA · On Agora since 2025
$6.51