Pen-Probe for Auracle ANALYZER and Auracle PRO gold Testers Discounts apply It measures refractive index (to

It measures refractive index (to what extent light is bent as it passes through the gemstone)

no matter how old it is

Or you may wish to see how the ANALYZER and PRO compare (the comparisons chart includes the KEE tester)

2 inches) X 25mm

not high enough for teapots and trays) - altogether the most versatile

Pen-Probe for Auracle ANALYZER and Auracle PRO gold Testers Discounts apply It measures refractive index (toSummary Replacement pen probe for electronic gold tester. Please take care to order the correct pen probe, this one has a gold sticker and is for: Auracle Analyzer Auracle PRO. With light use, how long should a pen probe last? The manufacturers say it should be replaced after a year but if it's still giving correct readings (check against your calibration sample or any hallmarked gold) then it's fine, no matter how old it is. They do, however, dry up