Refractometer [RA-620 / 600]

Refractometer [RA-620 / 600]

  • Space-saving of “A4 Size”
  • Graphic indicator to grasp concentration range
  • Easy maintenance with aluminum die casting housing


Beverages, foods, petroleum, pharmaceutical, alcoholic beverages, etc.


RA-620 RA-600
Measuring Method Detection of Critical Angle of Optical Refraction
Light Source LED Na-D Line (589.3nm)
Measuring Items Refractive Index, Brix, Other Concentrations
Measuring Range Refractive Index (nD) 1.32000 – 1.58000 1.3200 – 1.7000
Brix 0.00 ~ 100.00%
Accuracy *1 Refractive Index (nD) ±0.00002 ±0.0001
Brix ±0.014% *2 (0 ~ 85.0%) ±0.1%
Repeatability *3 Refractive Index (nD) ±0.00001 ±0.0001
Brix 0.01% 0.1%
Resolution Refractive Index (nD) 0.00001 0.0001
Brix 0.01% 0.1%
Temperature Control Peltier Thermostat 5 – 75℃ *4
Temperature Indication Resolution 0.01°C 0.1°C
Minimum Amount of Sample 0.2mL
Display 4.7-inch Backlit Colour LCD
Operation Touchscreen (Comes with Stylus.)
Security Password Protection
Data Storage Number of Methods 100 methods
Measurement Results 300 data
Calibration Record 20 data
Check Record 20 data
External Storage USB Flash Drive
Temp. Compensation Brix 5.00 ~ 75.00°C (Automatic compensation by preprogrammed conversion table.)
Concentration By Conversion Table 100 data
Interfaces LAN 1 port for personal computer (PC)
USB1.1 2 ports (for USB flash drive, A4-size printer, barcode reader, keyboard)
RS-232C 2 ports (for IDP-100, multiple sample changer)
Ambient Conditions Temperature 5 – 35°C
Humidity 85%RH or below (No condensation allowed.)
Power Supply AC 100 ~ 240V, 50/60Hz (Comes with AC adapter.)
Power Consumption 20W (max. 50W, min. 10W)
Dimensions 192 (W) × 281 (D) × 166 (H) mm
Weight 5kg
Materials in Contact
with Samples
Prism Artificial Sapphire
Sample Stage SUS316
Expandability Barcode Reader Reads sample name, measurement conditions, value of standard liquid
PC Software Data Acquisition Software

*1:By KEM’s standard measurement conditions. *2:From RI accuracy of results.
*3:By KEM’s standard measurement conditions. Subject to sample properties. *4:Lower limit 12°C below ambient.

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