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Refractometers

Refractometers
Instruments designed to measure a sample's refractive index or polarization of light; available in benchtop and portable sizes. Includes accessories and replacement parts.
Refractometers measure the change in the angle of light as it enters a transparent liquid or solid substance. Refractometers are commonly used to identify a material, determine its purity, or indicate the amount of a dissolved substance that it contains.
Lists of standard refractive indexes have been published to help users identify specific compounds or materials.
Refractometers also have different scales for specific purposes. For example, the Brix scale is used for measuring the sugar content of jams, marmalades, maple syrup, and honey. Refractometers are available in various Brix scales and may be calibrated specifically for glucose, maltose, fructose, and other sugars.
What Are Refractometers Used for?
Refractometers are used in a variety of industries and applications:
- Laboratory medicine: Used to measure total proteins in blood samples and specific gravity in urine samples
- Gemology: Used to identify gems
- Aquariums: Measure water salinity and specific gravity
- Industry: Measure coolant concentrations
- Homebrewing: Measure fermentable sugars that will be converted to alcohol
Refractometers may be analog or digital and can be found in handheld or benchtop models. Refractometer replacement parts are also available.

Fisherbrand™ Handheld Analog Automotive Refractometer
When you need reliable, accurate readings of your Battery Fluid or Antifreeze, the Fisherbrand™ Analog Automotive Refractometers delivers the value with ability to ready Ethylene, Propylene, and Battery Fluid measurements on one scale.
Fisherbrand™ Handheld Digital Honey Refractometer
Fisherbrand™ Handheld Digital honey Refractometers are portable, reliable and accurate for harvesting honey
Fisherbrand™ Handheld Digital Wine Refractometer
Fisherbrand™ Handheld Digital Wine Refractometers are portable, reliable and accurate to ensure wine has correct alcohol concentration.
Fisherbrand™ Handheld Digital Clinical Refractometer
Fisherbrand™ Handheld Digital Clinical Refractometers are portable, reliable and accurate for fast, reliable results to determine dehydration or total plasma protein levels in blood.
Fisherbrand™ Analog Abbe Benchtop RI Refractometer
FisherBrand™ Analog Abbe Benchtop RI Refractometer uses a digital thermometer to track temperature fluctuations throughout the sample reading processes to ensure an accurate reading each and every time.
Fisherbrand™ Handheld Analog Clinical Refractometer
When you need reliable, accurate readings of your Urine samples, the Fisherbrand™ Analog Clinical Refractometers delivers the value with the ability to read Serum Protein, Specific Gravity and Refractive Index all on a single scale.
Sample Volume | 1 mL |
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Calibration | Distilled Water |
For Use With (Application) | Clinical |
Scale Type | Linear |
Includes | Calibration Screw Driver, Soft sided case, Applicator, Manual |
Type | Clinical Refractometer |
Accuracy | 0.002; 0.2 g/dl; 0.0005 |
Dimensions (L x W x H) | 172 x 39 x 39 mm |
IP Rating | IP54 |
Increments | 0.002; 0.2 g/dl; 0.0005 |
Refractive Index | 1.331 to 1.36 |
Lighting Type | Ambient |
Scale Range | 1.000 to 1.050 Urine Specific Gravity,1 to 12 g/dl Serum Protein |
Resolution | 0.0005 |
Fisherbrand™ Handheld Analog Refractometer Daylight Plate Replacement Assembly
Replacement Daylight Plate with Collar for all Fisherbrand™ Handheld Analog Refractometer
Fisherbrand™ Handheld Analog Brix/Sucrose Refractometer
When you need reliable, accurate readings of your sugar or sucrose levels, the Fisherbrand™ Analog Brix Refractometers delivers value with a range of brix options
Includes | Calibration Screw Driver, Soft sided case, Applicator, Manual |
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IP Rating | IP54 |
Sample Volume | 1 mL |
Weight (English) | 0.881 lb. |
Lighting Type | Ambient |
Calibration | Distilled Water |
Temperature Range (Metric) | 10°C to 30°C |
For Use With (Application) | BRIX; Wine; Beverages; Foods; Industrial Fluids |
Scale Type | Brix |
Resolution | ±0.1° |
Fisherbrand™ Handheld Digital Brix/RI Refractometer
Fisherbrand™ Handheld Digital Brix Refractometers are portable, reliable and accurate. Whether you are checking sugar or sucrose concentrations you can rest assured you are getting an accurate reading.
Sample Volume | >0.2 mL |
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Power Supply Details | 1xAAA Battery |
Calibration | Distilled water |
Measurement Time | 2 sec. |
Scale Type | Brix Maltose 0 to 15.6% |
Includes | Digital refractometer, Rubber grip, Prism cover, Hard shell case, Battery, Applicator, Manual |
Accuracy | Brix ±0.2%; Refective Index ±0.0003nD |
Temperature Compensation | Yes |
Dimensions (L x W x H) | 25 x 58 x 121 mm |
IP Rating | IP65 |
Increments | Brix 0.1%; RI 0.0001nD |
Temperature Range (Metric) | 0°C to 40°C |
Resolution | Brix 0.1%; RI 0.0001nD |
Display | LCD |
Weight (Metric) | 90 g |
Fisherbrand™ Handheld Analog Salinity Refractometer
When you need reliable, accurate readings of your salt water, the Fisherbrand™ Analog Salinity Refractometers delivers the value with both readings of Salinity and Specific Gravity all in one scale.
Fisherbrand™ Handheld Digital Salinity Refractometer
Fisherbrand™ Handheld Digital Salinity Refractometers are portable, reliable and accurate. Ideal for checking the salinity of an aquarium or sodium concentrations
Includes | Digital refractometer, Rubber grip, Prism cover, Hard shell case, Battery, Applicator, Manual |
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Accuracy | Seawater Salinity ±2%; Chlorinity ±2%; Specific Gravity ±0.002; Refective Index ±0.0003nD |
Temperature Compensation | Yes |
Dimensions (L x W x H) | 25 x 58 x 121 mm |
IP Rating | IP65 |
Sample Volume | >0.2 mL |
Power Supply Details | 1xAAA Battery |
Calibration | Distilled water |
Temperature Range (Metric) | 0°C to 40°C |
Measurement Time | 2 sec. |
Scale Type | Salinity Seawater |
Display | LCD |
Weight (Metric) | 90 g |
Fisherbrand™ Handheld Digital Automotive Refractometer
Fisherbrand™ Handheld Digital Automotive Refractometers are portable, reliable and accurate for checking the freeze point of coolant, brake fluid levels, diesel exhaust fluids and battery fluid concentrations.
Includes | Digital refractometer, Rubber grip, prism cover, hard shell case, battery, Applicator, Manual |
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Dimensions (L x W x H) | 25 x 58 x 121 mm |
IP Rating | IP65 |
Sample Volume | >0.2 mL |
Weight (English) | 0.2 lb. |
Power Supply Details | 1xAAA Battery |
Calibration | Distilled water |
Temperature Range (Metric) | 0°C to 40°C |