Specifications

CZ prism refractometer for gem testing
High hardness CZ (cubic zirconia) testing prism.
Testing range: 1.35-1.85.

 

 

CZ prism refractometer for gem testing 

 

Refractometer  built  in power

This is a proffesional high quality gem refractometer.

Hard Cube Zirconia measuring prism.

Scale range:1.35-1.85.Accuracy: ±0.002,

High quality optical scratch proof glass.

Stainless steel table  and easy to clean  which is 45mm thick.

By advanced optic system,shadow edge is straight and sharp,easy to read it.   

Internally installed the narrow band witch (monochromatic) light.

There are two ways of inputing the voltage: AAbatteries and DC3V direct current supply(AC100—240V).

National patent design oil bottle.It is unique design of the bottle(Proprietary technology ZL200620096730.7),It is much safer ,much ecnomical and more convinent.

Refractometer size:140mm*90mm*40mm/5.51in*3.54in*1.57in

suitcase size:210mm*190mm*96mm/8.27in*7.48in*3.78in

Weight: 0.86kg/1.86lb

 

what included:

 

1.Refractometer

2.Polaris filter

3.AA battery x2

4.AC100-240V power suppy

5.refractive index Liquid(1.78±0.005)with unique designed bottle

6.Refractometer Index Reference List (up to 200 common gemstones, i.e. Calcite, Jadeite, Quartz etc.)

7.User's Manual

Factory offer 1 year full warranty and life time limited warranty

 

Operating Information:

• Open the upper cover then wash the gem and prism with alcohol.
• Lay the instrument on the worktable. Drop a little bit of special refractive oil onto the surface of prism and press it by a thin glass bar. (Be sure not too much or too little) 
• Make sure the ground surface of gem to be measured is close to the prism, press it again lightly, let the refractive oil be evenly distributed between the two surfaces then close the upper cover. 
• Press the light momentary switch, make sure that the internal light source is turned on when testing. 
• Move the eyepiece up and down and adjust the diopter accordingly. By this time you can see a light/dark boundary in the viewing field. The gradation (shade) on which the boundary located is called the refractive index of gem.

• MEASURING METHODS:
  • Remove the polarizer. Turn it onto eyepiece. Then turn the polarizer lightly. You can only read the refractive index value in one direction at a time because the polarizer only allows the light vibrated in one direction to pass through.
  • Turn the polarizer through 90°, you can measure the refractive index value of the light vibrated at right angles to that mentioned above.
  • Turn the gem in the same direction through small degree then turn the polarizer lightly according to above method, you can read the two refractive index values of the light vibrated at right angles to each other.
  • Operate continuously until the gem is at 180° position to its initial position. From a number of groups of measured refractive index values you can find the maximum and minimum refractive index. The difference between the two values is the birefringence of gem.

Maintenance:

• After measurement, remove any dirt from the refractometer's housing (casing) then clean the prism and the gem with alcohol to remove the refractive oil on it.
• Put back the refractometer into the box for protection.
• Remove the Battery from the Battery compartment if you are planning on not using the Refractometer for a long period of time to prevent leaks or molds that can damage your device.

Shipping:

  

We do Combined Shipment on any multiple purchases. We are pleased to grant a 10% discount on the shipping cost of purchases more than item. Please feel free to contact us for discounted shipping costs when you buy multiple items from us.