Brightwell Refractometer Calibration Standard 60ml

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2-10 Days Refractometer Calibration Standard 1.0264 Specific Gravity 1.3394 Refractive Index 35 ppt Salinity 53 uS/cm at 25 deg c Overview Brightwell Aquatics Aquarium Reagents Ref ractometer Calibration Standard is designed to provide an accurate reference for the calibration of seawater refractometers, hydrometers and other density measuring equipment. Instructions & Guidelines - Refractometers 1. Shake product well before using. 2. Clean Refractometer prism slide with fresh distilled water. 3. Dry completely with soft clean dry cloth. 4. Place several drops of Brightwell Refractometer Calibration Standard fluid on the slide. 5. Wait 45 seconds and calibrate to 35 ppt Salinity. Show more