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Hanna Instruments Digital Seawater Refractometer

Hanna Instruments Digital Seawater Refractometer
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* Digital refractometer for extremely fast and accurate results
* Optical device measures refractive index of marine aquarium water
* Displays result in PSU, salinity or specific gravity units in just seconds

Measuring salinity of marine aquariums does not get any easier OR faster than this! Now professional measurement is as simple as dripping sample water onto the prism surface and pressing the READ key. In less than 2 seconds, this outstanding precision device will display the results in clear, digital numbers on the LCD screen. Dual-level LCD shows measurements in Practical Salinity Units (PSU), Salinity in Parts Per Thousands (PPT) or Specific Gravity S.G. (20/20). Automatically compensates for temperature for accurate research-grade analysis. Rugged, water-resistant unit boasts compact design and operates on a 9V battery (included) for wire-free portability. Features low battery-life indicator and shuts off automatically after 3 minutes of non-use to preserve battery life. Digital Seawater Refractometer measures only 7-1/2" x 4" x 2-5/8" high.


Salinity Units
Salinity in
Parts Per
S.G. (20/20)
°C (°F)
Range: 0 to 50 0 to 150 1.000 to 1.114 0 to 80 °C
(32 to 176 °F)
Accuracy: ±2 ±2 ±0.002 ±0.3 °C (±0.5 °F)

Please click on "More Information" for calibration and measurement procedure.

Digital refractometer displays readings in approximately 1.5 seconds!
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