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1588. ABBE REFRACTOMETER
Designed for accurate and quick examination of the
a) Refractive index
b) Mean dispersion of liquids, solids and powder
ND Range : ND 1.300 to ND 1.700 in step of 0.001
Accuracy ± 0.0002
Temperature 0 - 100°C
The body of the instrument is fixed having a leaning of 60°, correct
refractive index and sugar percentage can be read directly in the
field.
It consists of a abbe double prism compensator, telescope mirror
limp, graduated, sector, reading, magnifier and a radial arm which
carries a vernier. Abbe's double prism leaves a narrow space (about
0.1 mm. ) between the adjoining faces of prisms and compensator
consists of the amici prisms which serves for rendering the line of
achromatic separation. A thermometer is fitted on the double prism. |
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1589. Butyro
Refractometer
Butyro Refractometer instrument can be used for measurement of fats
in ghee and other such products giving a reading directly in terms
of the oil scale also known as butyro scale. The micrometer
eye-piece allows an accuracy on this scale of 0.1 and the oil scale
may also be converted into a refractive index scale using converted
into refractive index scale using conversion tables. This allows
measurements on materials with index of refraction in the range of
1.42 to 1.49 with an accuracy of 0.0002 as tables are supplied for
converting oil scale reading into index of refraction, relative to
mean sodium lines. The prism box is water jacketed for temperature
control and a sample achromatising device enables the removal of all
colors from the border line thus enabling the instrument to be used
with white light.
reading into index of refraction, relative to mean sodium lines. The
prism box is water jacketed for temperature control and a sample
achromatising device enables the removal of all colors from the
border line thus enabling the instrument to be used with white
light.
The instrument is provided with a test liquid for checking and
resetting the scale if necessary and is encased in a portable wooden
box. Refraction range from 1.42 to 1.49 with accuracy of 0.0002
fitted with sugar and oil scale, sugar scale 50-80% and oil scale
0-100%. |
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