
- FTCo. Refractometer Salinity Calibration Fluid/Solution (30ml) - More than 200 tests
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Amazon
From $9.99 (3rd Party New)

From $9.99 (3rd Party New)

| Latest | $9.99 Apr 21, '16 |
| Highest | $9.99 Apr 26, '15 |
| Lowest | $9.99 Apr 26, '15 |
| Average | $9.99 (30d avg) $9.99 (90d avg) $9.99 (180d avg) $9.99 (365d avg) $9.99 (Lifetime average) |
| Added | Mar 5, 2015 |
30 day average: 35,884
90 day average: 33,735
Many hobbyist believe that the only way to calibrate refractometer is by using reverse osmosis/distilled water. That fact is usually true and is certainly appropriate for routine calibration, but it assumes that the refractometer was manufactured correctly and have not been damaged since manufacturing. As refractometers used by hobbyist become less and less expensive (with many now selling for less than $30), there is every reason to believe that they may no longer be accurate.
The only way to be sure that a refractometer gives correct information is to compare its accuracy against a pre-mixed saline solution. All refractometers should be checked in this fashion when purchased, and again any time there is a reason to be concerned.
Features
Conductivity: 53.0 mS
Salinity: 1.0264 SG / 35 PPT
Refractive Index: 1.3394 at 25C
Volume: 30ml / 1 oz
Directions
Place 3 drops of the solution on the prism of your refractometer. If the value shown does not correspond to about 1.0264, make adjustments according to the refractometer's manufacturer directions.
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