An aquarium refractometer is an instrument to measure the concentration of aqueous solution by measuring it’s refractive index. All water based solution can make light bend.thebending of light increases at a rate proportional to the increasing solution concentration. Digital refractometer is a precise optical instrument.it’s characterized by small volume,light weight,graceful in shape and easy to operate.there fore it can be used by all sides.
Aquarium refractometer CNT65
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