1) Direct Vision Spectroscope Without Wave Length Scale Model RDV-1
A complete and light weight direct vision spectroscope without wave length scale, for observing visible radiations from 400 to 750 mm.
2) Direct Vision Spectroscope with Wave Length Scale Model RDV-2................
A compact visible spectrometer which allows the direct reading of spectral length and employs a prism for dispersion. It is also useful for flame test of basic radicals (sodium, strontium, potassium, copper etc.) There is a single eyepiece and independent focussing tube for the graticule, which carries an index at 590mm. with "D", marked right below the scale, (corresponding to the wave length of sodium light) can be calibrated to a known light source by adjustment of knurled screw. The amount of light admitted to the spectroscope can be regulated by a variable slit, adjusted by a knurled ring round the rating tube.
3) Gemological Swivel Microscope Model RGM-8....................
Binocular tube with an inclination of 45 degree for greater ease of observation.
Magnification 7x to 45x.
Microscope Zooming ratio 6.4 : 1
Rack-Pinion focussing stroke 50 mm
Eyepiece Paired : High-point eyepiece 10x with adjustment.
Iris Diaphragm : 44mm - 3mm
Binocular body can be rotated a full 360 degree and locked in any position desired.
Illuminator : Top light 7W fluorescent bulb. Bottom 6V / 30W halogen bulb, both with adjustment of brighness.
Jewellery clamp : Steel wire & plan jewellery clamp.
4) Portable Refractometer..................................
Key Features:
? Heavy-duty and built to last
? Convenient & easy to carry
? Built-in Light Source that makes it a carry-and-use-it-anywhere device
? Comes with Automatic Temperature Compensation (ATC) that let itself adjust to the climate
? Approved by strict quality and safety standards, undoubtedly durable, very reliable and assures accurate testing results
? Comes with 3 pieces AG13 batteries, carrying case, polarizing filter, index oil, index reference list and user's manual
Specifications:
? Measuring Range : 1.30 - 1.81 RI
? Minimum Graduation : (RI) 0.01 RI
? Illumination : Internal Light Source with momentary/power switch
? Dimension : 35mm x 63mm x 115mm
? Scale Division : 0.01 nD
? Weight : 0.4 kg
? Ranges of Application : Laboratory, Gemology
? Filter : Polarizing filter
? Power Source : 3 x 1.5V AG13 button batteries
? Color : Black
Accessories included:
- One bottle of 1.800 Refractive Index Oil
- Polarizing Filter
- 3 pieces 1.5V AG13 Batteries
- Carrying Case
- Refractometer Index Reference List (For 77 common gemstones, i.e. Calcite, Jadeite, Quartz etc.)
- User's Manual
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