Group 1 Small Refractometers
Choosing the right refractometer for your application
The Refractometers on this page and most other Refractometers can be considered as belonging to one of 4 main groups depending on their specification, and the way in which they are going to be used.

Group 1 - Small instruments.
These are small handheld or palm size instruments costing from $200 to $2000. Typically these Refractometers cover portions of the Brix range low middle or high. or they have other application specific concentration scales - wine, protein, urine specific gravity, antifreeze, battery acid and others. These small instrument can be subdivided into two types. 
Hand held manual Refractometers $150 - $500
You hold these up to the light and look through the eyepiece. These are inexpensive but more cumbersome to use than an electronic type. They don't need batteries or power so they can be used anywhere anytime - at least in daylight. 
Small Electronic Refractometers $750 - $2000.00
These cover the same range as the manual types - they are the electronic 'replacements' for the manual type. Because they are digital and produce a readout they are less prone to operator error. Typically they include automatic temperature compensation.
Use group 1 instruments for non critical applications, quick checks, back up and portability. Ideal as personal instruments for QC personnel traveling to different locations.

All types - for Brix, Urine, specific gravity, protein in serum,
salinity, antifreeze, alchohol, wine, industrial fluids oils etc. Inexpensive. 

Hand held Brix Refractometer
AR200 - high resolution/accuracy lab refractometer  
Outstanding price performance for temperature compensated index, Brix, urine specific gravity and albumin in serum. PC link, NIST standard, upload special scales.
 Highly recommended - optional PC docking station upload your own scales
Brix/RI-Chek Digital Pocket Refractometer
A versatile refractometer that raises the bar for performance and value, the r2mini is easy to operate and provides quick results. The r2mini has an IP65 Dustproof/Water resistant rating so it can be used in virtually any environment.
Wine Refractometers
Wine refractometer, Oeshsle,
Recommended - everything you need for wine
Digital Clinical Refractometer 
Urine Specific Gravity
TS400 Clinical: urine specific gravity, protein concentration in plasma or serum, and total solids in other aqueous solutions.
  Group 2 Laboratory QC
Group 2 Laboratory Refractometers $6000 - $10000
These Refractometers are much more robust than the small electronic units. They have a better underlying accuracy (expressed as the index resolution - typically at least 0.0001) which translates into a better Brix accuracy 0.01 - 0.05. Many regulations specify Brix to the first decimal place so using a refractometer with a basic accuracy better than 0.1 is important. Group 2 Refractometers are simply more accurate and better built than the small units. They have sapphire prisms and sealed optics. A computer interface is usually a standard feature for printing and data download. Productivity features include flow through modules and temperature stabilization accessories
Use group 2 instruments for quality control, record keeping and heavy workloads. If you make 100s of tests per day you should choose from this group
Abbe Refractometers are highly reliable classic instruments which measure Refractive Index. Compared with other types of refractometers, the Abbe refractometers are capable of measuring liquid and solid samples such as plate glasses, plastic sheets, and other solid films.

Economy refractometer for routine laboratory applications Works with a PC

1.3200 - 1.5800 RI 0-100% Brix
Resolution 0.0001/0.05 Brix


Higher Resolution Workhorse laboratory unit. Excellent value
Best choice for heavy traffic quality control applications
Range 1.32000 - 1.54000 RI / 0-100% Brix
Resolution 0.00001/0.01 Brix

  Group 3 High Performance speciality
Group 3 High Performance Laboratory Refractometers $11000 - $25000
High performance Refractometers have the same robust construction as the laboratory types in group 2.  The accuracy is at least 0.00002 with a resolution to the 5th decimal place 0.00001. Instruments in the group may include the full index range out to 1.70000 and electronic temperature control of the sample area. Advanced features include computer interfacing, custom programming of concentration scales and interfacing with polarimeters.
Recommended for research and demanding application which require high accuracy and temperature dependent data.

ATR- Touch Series with temperature control
High-performance high accuracy refractometers for the determination of mixing ratios and quality, quantity control of solutions. Two models choice depending on Range and temperature control. High resolution 0,00001 RI / 0,01 % Brix

ATR- B 1,29000 - 1,58000 RI / 100 % Brix temperature control +10 - +80 °C
ATR- F 1,32000 - 1,70000 RI / 100 % Brix temperature control +5 - +100 °C

High Resolution Automatic Lab Refractometers ATR-P Series
The ATR P Refractometers are microprocessor controlled, high resolution critical angle Refractometers for measuring the optical density of a wide range of liquid media from low to high viscosity, and independent of opacity and color. Combines control electronics with separate IP65 measuring head with options for flow through operation.
Range 1.32000 - 1.54000 RI / 0-100% Brix
Resolution 0.00001/0.01 Brix
   Spectroscopic Refractometer
Measures refractive index at 7 discrete wavelengths and interpolates the full spectral range.
Range 1.3300 to 1.700 nD
NEW - amazing specifications first refractometer to provide detailed wavelength data.
  Group 4 Process Control
Group 4 Inline process Refractometers $8000 - $11000
Process Refractometers are designed for inserting into pipelines or vessels to monitor a process variable (typically dissolved solids) which is refractive index dependent. The refractometer produces a digital and analog output ready for transmission to a PLC or other controller.
Process Refractometers
index - transmitters

Analog and digital output signals for interfacing with PLC or computer control system.
In-line Refractometers
These in-line models can be incorporated in piping of manufacturing plants, liquid mixing devices, and washing apparatuses to continuously measure the concentration of various liquids. They are suitable for use in the control of mixing, concentration, fermentation, and control of the concentration of water-based or alkali-based detergent, etc.

Sugar Instruments

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