Standard Refractometer craft apron Ø22 x 21mm

Ø22 x 21mm

the instrument will alarm automatically

The optically corrected precision eyepiece is screwed in or out to focus the scale

spinels look clean to the naked-eye

Standard Refractometer craft apron Ø22 x 21mmThis outstanding instrument gives clearer, brighter, and more crisp readings than units that cost twice as much. The sharp lines are clearly visible and the correct reading is easily seen immediately. The unit has built in sodium (yellow) filter, eliminating the need for a special sodium light source. It comes with a white light source that fits in behind the sodium filter. All are packaged in a handy vinyl travel case.