Review on π JOR Refractometer: Accurate Dual-Range Scale Device for Measuring Salinity and Specific Gravity in Saltwater Aquariums and Reef Tanks - No Batteries Needed! by Ben Diesel
you are doing great work Correct calibration required.
Works great! Make sure you have a 35 ppt seawater calibration standard to calibrate with. When testing aquarium water. If you calibrate with distilled water as instructed, you will not get an accurate reading as seawater is heavier than regular saltwater.
- β DUAL-RANGE REFRACTOMETER --- A healthy saltwater aquarium requires a balanced salinity or salt concentration in the aquarium water. The JOR Refractometer helps maintain this fundamental parameter in your marine or reef aquarium by measuring both salinity and specific gravity. This gauge has a scale range of 0 to 100%, where 1% is one part per thousand (PPT) or 1000 parts per million (PPM) and the corresponding specific gravity range is 1000 to 1070.
- Newer model could have been selected
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