Measuring Range (nD) : 1.32000～1.58000
Temperature Control : Peltier Thermostat 5 – 75℃
PRODUCT
Refractometer
RA-620
Features
・Compact Size Benchtop Refractometer (Built-in Temperature Control )
Space-saving of A4 Size, Two-thirds of Previous Models in Size (192mm×281mm)(Comparison with previous models.)
Half of previous models in weight with aluminum die casting housing.
Can be installed anywhere in a limited space of lab.
・Easy to Clean Sample Stage
Easy operation with sample stage at the front.
・Sample Cover Equipped with Anti Volatilization Device
Anti Volatilization Device
Furnished on back side of sample cover to prevent sample liquid from volatilizing.
Splash Prevention
Sample cover, when opened, prevents sample from being splashed on LCD.
Secure Measurement
Start button will not be activated when sample cover remains open.
- Graphic indicator to grasp concentration range
Specifications
| Type | Refractometer |
|---|---|
| Model | RA-620 |
| 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 Brix : 0.00 ~ 100.00% |
| Accuracy*1 | Refractive Index (nD) : ±0.00002 Brix : ±0.014% *2 (0 ~ 85.0%) |
| Repeatability*3 | Refractive Index (nD) : ±0.00001 Brix : 0.01% |
| Resolution | Refractive Index (nD) : 0.00001 Brix : 0.01% |
| Temperature Control | Peltier Thermostat 5 - 75℃ *4 |
| Temperature Indication Resolution | 0.01°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 | DC24V（Main unit), AC100-240V±10％, 50/60Hz（AC adapter） |
| Power Consumption | Approx. 20W |
| Dimensions | 192（W）×281（D）×166（H）mm |
| Weight | Approx. 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.
Standards
ASTM D1218 Standard Test Method for Refractive Index and Refractive Dispersion of Hydrocarbon Liquids
ASTM D1569 Standard Test Methods for Detergent Alkylate
ASTM D1992 Standard Guide for Testing Synthetic Plasticizers Used in Rubber
ASTM D2140 Standard Practice for Calculating Carbon-Type Composition of Insulating Oils of Petroleum Origin
ASTM D4056 Standard Test Method for Estimation of Solubility of Water in Hydrocarbon and Aliphatic Ester Lubricants
ASTM D4095 Standard Practice for Use of the Refractometer for Determining Nonvolatile Matter (Total Solids) in Floor Polishes
ASTM D5006 Standard Test Method for Measurement of Fuel System Icing Inhibitors (Ether Type) in Aviation Fuels
European Pharmacopoeia / 2.2.6. REFRACTIVE INDEX
ICUMSA GS4/3-13 The Determination of Refractometric Dry Substance (RDS%) of molasses - Accepted and Very Pure Syrups (Liquid Sugars), Thick Juices and Run-off Syrups - Official
ISO 1743 Glucose syrup — Determination of dry matter content — Refractive index method
OIML R124 Refractometers for the measurement of the sugar content of grape must
United States Pharmacopeia–National Formulary / 31 <831> REFRACTIVE INDEX
Software
Option
-
JCSS Accredited Refractive Index & Brix Standard Liquids
Used to confirm the measurement accuracy of Refractometers and Brix Meters in routine checks and calibrations.
KEM’s range of standards can be used for testing in the measurement range of nD 1.33299 to 1.658** (at 20°C). -
Multiple Sample Changer
CHD-502N
30 samples can be loaded for continuous measurements.
Pressurized sampling by pump.
Room temperature only. -
Auto Clean and Sampling Unit
DCU-551N
Automatic sample delivery and cleaning for the measurement of single sample at room temperature.
Sample vial: 20mL. -
Printer
IDP-100
Printer to print out dots with ink ribbons
Catalog
■General-Catalog.pdf
■Refractometer RA-620 600.pdf
■KEM-SET-for-Petrochemical.pdf
■KEM-SET-for-Palm-Oil.pdf
■KEMSET for Food.pdf
■KEM-SET-for-Cosmetics.pdf
■KEM-SET-for-Beverage.pdf
