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HI96831 digital refractometer for ethylene glycol freezing point analysis

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.

Brand: Hanna

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HA-HI96831 HI96831 digital refractometer for ethylene glycol freezing point analysis HI96831 digital refractometer for ethylene glycol freezing point analysis Login for price  

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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.


  • One-point calibration
    • Calibrate with distilled or deionized water
  • Small sample size
    • Sample size can be as small as 2 metric drops (100 μl)
  • 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 measurements 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.
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

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