Portable Refractometers

Product Description

The portable digital refractometers from Eagle Eye measure the refractive index, BRIX, concentration, specific gravity, alcohol content, freezing point and other related values of your samples within seconds with a 99.999% accuracy rate. The handheld refractometer utilizes infrared adapters for seamless wireless communication to manage results. Up to 1,100 measurement results can be stored in the internal memory with date/time stamp and sample identification.

  • Specifications
  • FAQs
  • Benefits
  • Beverage Solutions

Technical Specs

Measurement Method:Determination of the angle of total reflection of the D-line of sodium (589.3 nm)
Refractive Index:Resolution: 0.0001
Accuracy: ± 0.0005
Brix %:Measurement range 0 – 85 Brix%
(%):Resolution: 0.1 Brix%
Accuracy: ± 0.2 Brix%
Temperature (ºC or ºF):Measurement range: 10 – 40°C
Resolution: 0.1°C
Display: °C or °F
Ambient temperature: 5 – 35°C
Measurement Units:nD, nD temperature compensated, Brix%, HFCS42, HFCS55, T.A. 1990, °KMW (Babo), °Baume, °Oechsle (D, CH), w/w%, v/v%, specific gravity and freezing point (°C or °F) for ethanol and NaCl, w/w%, v/v% and freezing point (°C or °F) for ethylene glycol and propylene glycol, w/w% and v/v% for isopropanol, user defined unit
Temperature Compensation:With user-defined temperature compensation coefficient (nD temperature compensated, user defined), or automatically (all other units). Up to 10 temperature correction coefficients can be stored in the instrument.
Calibration:With pure water
Data Memory:Up to 1100 results (measured value, sample and instrument identification, temperature correction coefficient, date, and time)
Display:Backlit LCD
Interface:Infrared for data transfer to PC and printer (IrDA or RS232C protocol)
Weight:Approximately 250 g
Batteries:2 x LR3, 1.5 V, type AAA


What are some common applications areas for this product?
Common applications include but are not limited to:

  • Aviation – deicing fluids
  • Biotechnology
  • Candy / Confectionary
  • Cosmetics
  • Edible Oils
  • Electronics
  • Environmental
  • Food & Beverage
  • General Quality Control
  • Green Energy
  • Laboratory Testing
  • Milk and Dairy Products
  • Mining
  • Museum Specimens
  • Petrochemical
  • Telecom
  • Transportation
  • Uninterruptible Power Sources (UPS)
  • Utilities
  • Waste Water Treatment
  • Wine / Beer / Spirits

What is the measurement range of the portable refractometers?
The range of refractive index the portable refractometers can measure varies from 1.32 to 1.65, depending on the model.

Can the portable refractometers be used to measure concentration?
Yes, a sample’s refractive index value can be automatically converted into concentration values for a large number of factory-programmed substances. You can also program special substances as required. Sample naming ensures perfect traceability of results.

How many measurements the portable refractometers store?
The portable refractometers can store up to 1,100 results in the built-in memory.

How often should I calibrate the portable refractometer?
To calibrate the instrument, measure a certified standard liquid and compare the result to the reference value indicated in the calibration certificate of the standard. The physical properties (refractive index, viscosity) of the liquid density standards should be similar to those of the samples. The frequency of calibrations with certified liquid refractive index standards depends on your requirements and judgement. Recommendation: 1 to 2 calibrations per year.

How do the portable refractometers transport data?
The portable refractometers utilize infrared for data transfer to a PC or printer (IrDA or RS232C protocol).


Unbeatable usability – for fast measuring times 
  • Intuitive user interface
  • Suitable for both left- and right-handed users
  • High-resolution display
  • Versatile hand-held and benchtop meter all-in-one: The cell can be immersed directly into the sample or place the meter on a flat surface and add a drop of sample into the measurement cell.
Robust design with wide applicability – for a long working life
  • Leakproof sealed housing for industrial and field applications
  • Broadest measuring range of any handheld portable refractometer

Beverage Solutions

  • Raw material quality control
  • Batch adjustments for alcohol, BRIX, and more
  • Fill level determintations using specific gravity and/or density
  • Alcohol determination for TTB tax purposes
  • Process monitoring and control

Beverage Solution Product Offering

For inexpensive, easy, quick batch testing and adjustments

For determining alcohol content, BRIX, fill levels and more

For process applications

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  • Description
    3.5 Place Refractometers
    Range: 1.32 up to 1.65

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