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 content of the solution, a refractometer is therefore ideal for measuring the salt content in seawater aquariums quickly and, above all, accurately.
The salt concentration is determined in seconds with just a few drops of water. It can be read either as absolute salt content (salinity) in per mille (‰, ppt) or as relative density (kg/l compared to water at 20 °C).
In principle, a refractometer is always much more accurate and mechanically much less sensitive than an aerometer.
Scope of delivery
Salinity refractometer, 1 small bottle of dist. Water, 1 pipette for applying the water drop, 1 screwdriver for calibration, 1 soft cloth, operating instructions (DE/EN), sturdy plastic box
Technical data
|
Measuring range rel. density |
1.000 - 1.070 kg / dm3 |
|
Salt content |
0 - 100 ‰ |
|
Scale 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 |
Langenhansen 10-12
74744 Ahorn
Germany
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