| we can supply Pocket Digital RefractometerHere are brief introduction of our company:Gemological instrument is professionally designed for testing or identifying the gemstone. It is a good instrument to the professional practitioner or the student who are engaged in the gem industry. We have Gemological Refractometer , Spectroscope, Polariscope, Dichroscope, Chealse Filter, Gem Magnifier, Gem Gauge, Gem balance, Ultrasonic Cleaner etc…MODEL:PDR28S SCALES:SALINITY,REFRACTIVE INDEX RANGE:SALINITY 0-28%REFRACTIVE INDEX 1.3330-1.3900 DIVISIONS:SALINITY 0.1REFRACTIVE INDEX 0.0001 ACCURACY:BRIX ±0.1REFRACTIVE INDEX ±0.0003 Original:BRIX 0REFRACTIVE INDEX 1.3330 | 
