Think about it... you have hundreds, thousands even tens of thousands of dollars invested in your marine tank, yet you probably rely on a $10 box type hydrometer to measure saliniity. Chances are, the hydrometer is not accurate, sometimes not even close. A salinity refractometer is the only way to accurately measure salinity and specific gravity. All of our salinity refractometers have ATC - Automatic Temperature Compensation: when the temperature of the product sample varies from 68°F (20°C), readings are automatically adjusted to compensate for temperature variance between 50°F to 86°F (10°C to 30°C).
Reads 0-10% salt and 1.000-1.070 specific gravity.
To check salinity- simply place 2-3 drops of tank water on the meter and look at the reading through the eyepiece.
To calibrate- place 2-3 drops of R.O. or distilled water on the meter, look through the eyepiece and turn the calibration screw until the scale reads 0.
Improved prism design for easier viewing
No screwdriver needed for calibration (thumbscrew adjustment)