Hydrometer

…the Tropic Marin Hydrometer comes in. The Tropic Marin High Precision Hydrometer provides an exact and reliable measurement of specific gravity, and it never needs to be re-calibrated, so it's a perfect reference device for calibrating other equipment. High precision hydrometer for determining the…

Why does BRS recommend this? If you have been using a hydrometer and have never tried a refractometer then you should really invest in one. They use much less water, and can easily be calibrated for accurate repeatable readings. For the most accurate readings you will want to calibrate the…

…Parts Per Thousand of saturated salt. This is the oldest of the 3 seawater measurements scales S.G. - The current standard of Specific Gravity hydrometers and refractometers. The Milwaukee Instruments MA887 digital refractometer is easy to calibrate and easy to read and provides highest accuracy…

…your tanks saltwater is mixed correctly. 1.0264sg | 35ppt | 53µS Two Sizes Available 60mL - great for refractometers 250mL - ideal for hydrometers Calibration of any testing device is required and the more often you perform calibration procedures the more accurate your readings will be.…