Atago 3281 RX-5000 Automatic Digital Bench-Top Refractometers, Refractive index (nD) : 1.32700 to 1.58000 Measurement Range

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ScaleRefractive index
Measurement RangeRefractive index (nD) : 1.32700 to 1.58000
Brix : 0.00 to 100.00%
ResolutionRefractive index (nD) : 0.00001%
Brix : 0.01%
Measurement AccuracyRefractive index (nD) : ±0.00004
Brix : ±0.03%
* When measuring a standard sucrose solution of up to 50% Brix or standard refractive index solution at 20°C
RepeatabilityRefractive index (nD) : ±0.00002
Brix : ±0.01%
* When measuring a standard sucrose solution of up to 50% Brix or standard refractive index solution at 20°C
Ambient Temperature5 to 40°C
Measurement Temperature5 to 60°C
Power SupplyAC100V to 240V, 50/60Hz
Included AccessoriesSoftware, PolariSoft
Dimensions & Weight37×26×14cm, 6.4kg
(Main Unit only)
Power consumption30VA
Output terminals• Printer output (Digital printer DP-RX is available as an Optional.)
• Computer - RS-232C
Connection to a USB port requires a USB to RS-232 adapter (optional)
Warranty2 years standard (3 years with product registration)

  • * Calibration Certificate : Contact an ATAGO representative for details.
  • Cover plate : RE-6532
  • Tube band : RE-8507
  • Printer paper (regular) for Thermal printer : RE-8412
  • Printer paper (long-term storage) for Thermal printer : RE-8414
  • Printer paper for Dot matrix printer : RE-89403
  • Ribbon cassette : RE-89402
Call 01463 830401 For Any Assistance

The World's Highest Standard of Technology Stemming from Over Half a Century of Expertise

The World's Highest Standard of Technology Stemming from Over Half a Century of Expertise

World's Highest Standard of Accuracy

The RX series are the most accurate of ATAGO refractometers programmed with a trusted and advanced algorithm. The epitome of which boasts the accuracy of ±0.000010 nD and ±0.005% Brix.

Ergonomically Designed Layout

The RX- a series was designed with ease of use in mind. Extensive research was performed in the design phase to ensure an ergonomic interface that made operation easy while maximizing efficiency.

4 Measurement Mode Options

For maximum accuracy
Displays the measurement value once the sample reaches the target temperature.
For no temperature control
Provides an option to turn the thermo-module off. Without temperature control, the measurement value is displayed in 4 seconds after the START key is pressed.
For fast results
Measures refractive index and temperature at fixed intervals and displays the estimated measurement value at the target temperature.
For emulsion samples
Displays the measurement value once a certain level of sample stability is achieved.

The RX-5000 combines nozzle for connect a water bath instead of built -in thermo module.The RX-5000 is equipped with all the standard features of the RX-α series.

This product comes standard with a two (2) year limited warranty against manufacturer’s defects from the date of the original purchase. The warranty period can be extended to three (3) years if the product is registered with ATAGO.



Digital Refractometers RX-α series Measurement Method

4 easy steps

  • Place a sample on the prism.
  • Press the START key to start a measurement.
  • Measurement value is Displayed.
  • Wipe off the sample to clean.


    • SKU
    • Commodity Codes
  • Measurement Range
    Refractive index (nD) : 1.32700 to 1.58000, Brix : 0.00 to 100.00%
  • Resolution
    Refractive index (nD) : 0.00001%, Brix : 0.01%
  • Measurement Accuracy
    Refractive index (nD) : ±0.00004, Brix : ±0.03%
  • Use
    Brix, Refractive Index
  • Manufacturer
    Atago Co Ltd
  • Country of Origin

Icons, for functions, specifications and scales have been added to this catalogue

Can be connected to a recorderMeasurement at a set temperature
Can be connected to a printerAutomatic Temperature Compensation
Alarm output for high- and low-limit valuesCan be connected to a circulating
RS232C InterfaceContinuous measurement
In-line measurementHigh temperature samples
User scales can be inputtedExternal Light Interference


Calibration with waterClinical refractometers
Calibration with exclusive standard liquidRefractive index scale
Compact and easy to carrySalt concentration scale
Digital displaySeawater scale
AC outlet (AC100 to 240V)Wine scale
Battery operated