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Digital Refractometer for Ethylene Glycol Analysis

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Price : 180 USD

Code: #15244

Vietnamese version

Supplier: Hanna Instruments

The HI96831 is a rugged, portable digital refractometer designed for the measurement of percent volume and freezing point of ethylene glycol based solutions. The HI96831 has a high accuracy of ±0.2% volume and ±0.5 °C freezing point and features simple operation that gives reliable results each and every time. All readings are automatically compensated for temperature variations 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.

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  • The HI96831 Digital Refractometer utilizes the measurement of refractive index to determine the percent volume and freezing points of ethylene glycol based solutions. Ethylene glycol is used in glycol cooling systems for industrial applications. Maintaining the appropriate percent of glycol is important in glycol chillers as too low of a percentage could lead to the system freezing and rupturing while too much glycol will reduce the systems efficiency. The instrument converts the refractive index of a sample to percent volume or freezing point. These conversions are based on internationally recognized references for unit conversion and temperature compensation for glycol solutions (e.g. CRC Handbook of Chemistry and Physics, 87th Edition). The HI96831 is an easy-to-use tool for measuring freezing point and percent volume in ethylene glycol solutions, in the field or in the lab.
     
    - Designed for ethylene glycol analysis
    - Automatic Temperature Compensation
    - 0 - 100% Volume range with ±0.2% accuracy
    - 0 to -50 °C freezing point range with ±0.5 °C accuracy
     
    Measurement Units
    Freezing point is displayed as a temperature from 0.0 to -50.0 °C corresponding to 0-58 % by volume. The display blinks the freezing point when the concentration of Ethylene glycol is greater than 78 % concentration by volume. When the display shows “LO”, the freezing point is at a minimum (below -50 °C).
    Making a Standard Solution:
    - Place container (such as a glass vial or dropper bottle that has a cover) on an analytical balance.
    - Tare the balance.
    - Volumetrically add X mL of high purity ethylene glycol (CAS #: 107-21-1; MW 62.068) to a 100 mL Grade A volumetric flask.
    - Use distilled or deionized water to bring the flask close to the total volume, mix, allow the solution to return to room temperature.
    - Once the solution has returned to room temperature use distilled or deionized water to bring the total volume to 100 mL. Mix solution well before use.
     


    Ethylene Glycol

    Total Volume

    Expected Freezing Point Value

    		  

    10% V/V

    10.00 mL

    100.00 mL

    -3.8 °C (25.2 °F)

    40% V/V

    40.00 mL

    100.00 mL

    -26.3 °C (-15.4 °F)
     
     

  • Percent Volume Range (% V/V)

    0 to 100%

    Percent Volume Resolution (% V/V)

    0.1 %

    Percent Volume Accuracy (% V/V) @20°C/68°F

    ±0.2 %

    Freezing Point Range

    0 to -50 °C (32 to -58 °F)

    Freezing Point Resolution

    0.1 °C (0.1 °F)

    Freezing Point Accuracy (@25°C/77°F)

    ±0.5 °C (±1.0 °F)

    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 0 and 40°C (32 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

    HI96831 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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