technology

Digital Refractometer for % Brix and Potential Alcohol (% V/V) Analysis in Wine, Must and Juice

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Price : 180 USD

Code: #15241

Vietnamese version

Supplier: Hanna Instruments

The HI96813 is a rugged, portable digital refractometer designed for sugar (% Brix) measurement and potential alcohol measurement (% V/V) of wine, juice and must. The HI96813 features a high accuracy of ±0.2% Brix and 0.2% V/V potential alcohol. All readings are automatically compensated for temperature variations according to the ICUMSA Methods Book standard and displayed within a 1.5 second response time. The sealed flint glass prism and stainless steel well are easy to clean. Just wipe with a soft cloth in preparation for the next sample.

rightMORE INFORMATION

  • The HI96813 Digital Wine Refractometer converts the refractive index of the sample to sucrose concentration in units of percent by weight, % Brix (also referred to as °Brix). The conversion used is based on the ICUMSA Methods Book (International Commission for Uniform Methods of Sugar Analysis). Since the majority of sugar in grape juice is fructose and glucose and not sucrose, the reading is sometimes referred to as “Apparent Brix”.
    The HI 96813 allows the user to tailor the instrument to their specific needs based on their experience, since no fixed conversion factor is universally applicable. The first conversion is based on the % Brix value and an adjustable conversion factor between 0.50 and 0.70 (0.55 is a common value).
    Potential alcohol (%V/V) = (0.50 to 0.70) x % Brix
    One drawback of the above equation is that it does not take into account the non-fermentable sugars and extract. A second equation is also available that takes these factors into account and can give a more accurate estimate of the alcohol content in the finished wine. This conversion is named “C1” on the meter, and uses the following equation:
    Potential Alcohol (%V/V) = 0.059 x [(2.66 x °Oe) - 30] (C1)
    * 1°Oe is roughly equal 0.2% Brix
     
    The HI96813 is an easy to use tool for winemakers for measuring sugar and potential alcohol in grapes or must, in the field or in the lab.
    - Designed for wine sugar and potential alcohol analysis
    - Temperature Compensation algorithms based on sucrose solution
    - 0 to 50 % Brix range with an accuracy of ± 0.2% Brix
    - 0-25 % potential alcohol range with an accuracy of ± 0.2% potential alcohol
    To make a Brix Solution, follow the procedure below:
    - Place container (such as a glass vial or dropper bottle that has a cover) on an analytical balance.
    - Tare the balance.
    - Weigh out X grams of high purity sucrose (CAS #: 57-50-1) directly into a beaker
    - Add distilled or deionized water to the beaker so the total weight of the solution is 100g.
    Note: Solutions above 65% may need to be vigorously stirred or shaken and heated in a water bath to roughly 40°C (104°F). Remove solution when sucrose has dissolved and allow to cool before use.
     

    Example to prepare as 25% Brix solution:

    % Brix

    Sucrose (g)

    Water (g)

    Total (g)

    25

    25.000

    75.000

    100.000

     
     

  • Sugar Content Range

    0 to 50% Brix; 0-25% V/V Potential Alcohol

    Sugar Content Resolution

    0.1% Brix; 0.1% V/V Potential Alcohol

    Sugar Content Accuracy (@25ºC/77ºF)

    ±0.2% Brix; ±0.2 V/V Potential Alcohol

    Temperature Range

    0 to 80°C (32 to 176°F)

    Temperature Resolution

    0.1°C (0.1°F)

    Temperature Accuracy

    ±0.3 °C (±0.5 °F)

    Temperature Compensation

    automatic between 10 and 40°C (50 to 104°F)

    Measurement Time

    approximately 1.5 seconds

    Minimum Sample Volume

    100 μL (to cover prism totally)

    Light Source

    yellow LED

    Sample Cell

    stainless steel ring and flint glass prism

    Auto-off

    after three minutes of inactivity

    Enclosure Rating

    IP65

    Battery Type / Life

    9V / approximately 5000 readings

    Dimensions / Weight

    192 x 102 x 67 mm (7.6 x 4.01 x 2.6”) / 420 g (14.8 oz.)

    Ordering Information

    HI96813 is supplied with battery and instruction manual

    Warranty

    2 years

  • One-point calibration
    · Calibrate with distilled or deionized water.
    Small sample size
    · Sample size can be as small as two metric drops (0.1 mL).
    Automatic Temperature Compensation (ATC)
    · Samples automatically compensated for temperature variations.
    Quick, accurate results
    · Readings are displayed in approximately 1.5 seconds.
    Dual-level LCD
    · The dual-level LCD displays measurement and temperature readings simultaneously.
    Stainless steel sample well
    · Easy to clean and corrosion-resistant.
    Battery indicators
    · Battery percent level remaining at startup and low battery indicator.
    Automatic shut-off
    · To conserve battery life the meter shuts off automatically after three minutes of non-use.
    IP65 water resistant protection
    · Water resistant ABS plastic casing designed to perform under laboratory and field conditions.

 
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