Grotech optical precision refractometer (ATC)

A refractometer is a precision optical instrument for the exact determination of the optical density or refractive index of a liquid.
As the refractive index of salt water is directly dependent on the salt concentration of the solution, a refractometer is therefore ideally suited for quick and above all exact measurement of the salt concentration in marine aquariums.
With just a few drops of water, the salt concentration is determined within seconds. It can be read off either as absolute salt content (salinity) in per mill (‰, ppt) or as relative density (kg/l compared to water at 20 °C).
A refractometer is always much more accurate and mechanically much less sensitive than an aerometer.

Scope of delivery

Salinity refractometer, 1 small bottle distilled water water, 1 pipette for applying the water drop, 1 screwdriver for calibration, 1 soft cloth, operating instructions (DE/EN), stable plastic box

Technical data

Measuring range rel. density

1.000 - 1.070 kg / dm3

Salinity

0 - 100 ‰

Display resolution

0.001 / 1 ‰

Compensated temperature range

10 - 30 °C

Conversion table

Salinity [‰]

Density [at 25 °C]

Rel. Density [at 25 °C]

0

997.05

1.0000

29

1018.8

1.0218

30

1019.6

1.0226

31

1020.3

1.0233

32

1021.1

1.0241

33

1021.8

1.0249

34

1022.6

1.0256

35

1023.3

1.0264

36

1024.1

1.0271

37

1024.9

1.0279

38

1025.6

1.0286

39

1026.4

1.0294

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