They are characterized by the sharpness of the image and its easy-to-read. The filter of sodium, which is only traversed by light with a wavelength of 589 nm, enables you to use the portable refractometer with a light source, conventional or in an environment with brightness sufficient.
Offer a measurement range 1.33 to 1.83 nD, . Have prisms of optical glass with a resolution of 0.01 na.
With a weight of only 400 grams, refractometer for gemstones are light and manageable. The network connection allows the automatic switching between 110 and 220 V.
Refractometer for gemstones of Krüss have a cast aluminum housing and are supplied with a polarization filter and a manual.
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