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D-d Refractometer With Atc

D-d Refractometer With Atc

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£41.99 Stock : 4 Product Code: AQPR001 Our Ref No : 4277
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A refractometer is a simple and robust way of accurately measuring the salinity within your aquarium.
The refractometer works on the principle of refraction of light to determine the salinity and is very accurate, but also very simple and robust
Light enters the instrument at one end and passes through a sample of the aquarium water which causes it to be refracted, (bends the light), depending on the salinity of the water. The refracted light is reflected off a scale inside and can be viewed through an eyepiece on the opposite end of the instrument.
Display salt level in both specific gravity (S.G.) and grams per litre range from 1.015 - 1.030.
Supplied in hard plastic case.

This refractometer specifically designed for aquarium use for measuring the salinity of Natural Sea Water.
Almost all hand held salt water refractometers available to the hobby are designed and calibrated for the testing of brine solutions, i.e. sodium chloride, and are not calibrated for the refractive index of natural sea water.
Even though the largest percentage of salt in the sea is sodium chloride, the presence of other significant ions such as magnesium and calcium in natural sea water results in a different refractive index relative to that of brine. A standard salt (brine) refractometer will therefore not give the correct salinity for natural sea water (NSW) and a conversion factor must be applied.