Hanna Digital Refractometers


with Stainless Steel Sample Well and 1.5 Second Response Time

Hanna digital refractometers eliminate the uncertainty associated with mechanical refractometers. After a simple user calibration with distilled or deionized water samples are measured within seconds. The measurement and temperature, selectable in °C or °F, are displayed on the easy-to-read LCD. With IP65 water protection, these refractometers are durable and compact enough to be used at home, in the lab, or out in the field.

refractometers HI96841



Stainless steel sample well and IP65 water protection

The stainless steel sample well is easy to clean and corrosion resistant. The ABS thermoplastic casing is built to perform under harsh laboratory and field conditions.


Easy measurement and fast response time

Place a few drops of the sample in the well and press the READ key. These digital refractometers feature a 1.5 second response time.


Small sample size

Sample size can be as small as 2 metric drops.


Automatic Temperature Compensation (ATC)

Measurements are automatically compensated for the effects of temperature for exceptionally accurate measurements.


Unit selection

Pressing the RANGE key quickly cycles through units of measurement when applicable.


Single-point calibration

These digital refractometers offer single-point calibration with distilled or deionized water.



Battery life and current measurement unit is displayed when powered on.


Battery Error Prevention System (BEPS)

In the event that low battery power could adversely affect readings, BEPS flashes the battery icon on the display. To save battery life, auto shut-off powers down these meters after three minutes.


Refractive Index

Refractive Index is an optical characteristic of a substance and the dissolved particles in it.

The refractive index of a substance is strongly influenced by temperature and the wavelength of light used to measure it. Therefore, care must be taken to control or compensate for temperature differences and wavelength. The refractive index measurements are usually reported at a reference temperature of 20°C (68°F), which is considered to be room temperature.

Refractive index is defined as the ratio of the speed of light in a vacuum to the speed of light in a substance. A result of this property is that light will “bend,” or change direction, when it travels through a substance with a different refractive index. This is called refraction.

When passing from a material with a higher to lower refractive index, there is a critical angle at which an incoming beam of light can no longer refract, but will instead be reflected off the interface between the two substances. This is called total internal reflection.

The critical angle can be used to easily calculate the refractive index according to the equation:

sin (Θcritical) = n2 / n1

Where n2 is the refractive index of the lower-density medium; n1 is the refractive index of the higher-density medium.

A digital refractometer passes an LED light through a prism in contact with the sample. An image sensor determines the critical angle at which the light is no longer refracted through the sample. Specialized algorithms then apply temperature compensation to the measurement and convert the refractive index to the specified parameter.


Hanna Digital Refractometers

Hanna offers portable, digital refractometers for measuring parameters including: sugar, brix, baume, salinity, NaCl, glycol, and potential alcohol for accurate analysis in many industries including food, beverage (juice), wine, aquaculture, and more.


Digital Refractometers for Sugar Analysis Throughout the Food Industry

Hanna offers five sugar refractometers to meet the requirements of the food industry. The HI96800 Refractive Index/Brix, HI96801 % Brix (sucrose), HI96802 Fructose, HI96803 Glucose and HI96804 Invert Sugar digital refractometers are rugged, portable and water-resistant for measurements in the lab or field.

Model #
1.3300 to 1.5080 nD
1.3330 to 1.5040 nD₂₀
0.0 to 85.0% Brix
0 to 85% Brix
0 to 85% mass
(% w/w fructose)
0 to 85% mass
(% w/w glucose)
0 to 85% mass
(% w/w invert sugar)

Digital Refractometers for Measurement of Sugar in Wine

Hanna offers five wine refractometers to meet the various requirements throughout the wine industry. The HI96811, HI96812, HI96813, HI96814 and HI96816 Digital Wine Refractometers are rugged, lightweight and waterproof for measurements in the lab or field.

Model #
0 to 50% Brix
0 to 28°Baumé
0 to 50% Brix
0 to 25% V/V
Potential Alcohol
0 to 50% Brix
0 to 230°Oechsle
0 to 42°KMW
4.9 to 56.8% V/V potential alcohol
(10 to 75% Brix)*

Digital Refractometer for Measurement of Wort Sugar Analysis

The HI96841 Digital Refractometer measures the refractive index of wort and converts it to °Plato with temperature compensation. The HI96841’s IP65 water-resistant casing and sealed sample well are built to perform under harsh conditions, making it suitable for use in any brewery.

Model #
0 to 30 °Plato

Digital Refractometer for Sodium Chloride Measurement Throughout the Food Industry

Hanna offers the HI96821 digital sodium chloride refractometer to meet the requirements of the food industry. This optical instrument employs the measurement of the refractive index to determine sodium chloride concentration in aqueous solutions used in food preparation. It is not intended for seawater salinity measurements.

Model #
0 to 28 g/100 g
0 to 34 g/100 mL
1.000 to 1.216 Specific Gravity (S.G.)
0 to 26 °Baumé

Digital Refractometer for Natural or Artificial Seawater Analysis

Hanna‘s HI96822 Digital Refractometer is a rugged, portable, water resistant device that uses the measurement of the refractive index to determine the salinity of natural and artificial seawater, ocean water or brackish intermediates.

Salinity is a critical measurement in many applications, such as aquaculture, environmental monitoring, aquariums, desalination plants, well water, and many more.

Model #
0 to 50 PSU
0 to 150 ppt
1.000 to 1.114 Specific Gravity (S.G.)

Digital Refractometers for Ethylene and Propylene Glycol Analysis

The HI96831 for Ethylene Glycol and HI96832 for Propylene Glycol Digital Refractometers are rugged, portable, water-resistant devices that use the measurement of the refractive index to determine the percent volume and freezing point of ethylene and propylene glycol based solutions respectively.

Model #
0 to 100% % Volume (% v/v)
0 to -50°C (32 to -58°F) Freezing Point (FP)
0 to 100% % Volume (% v/v)
0 to -51°C (32 to -59.8°F) Freezing Point (FP)