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    Food Salt meter 0-28%

Food Salt meter 0-28%

  • Sample size as small as 2 metric drops (100 μl)
  • Sealed stainless steel well with high-grade optical prism made of flint glass
  • Fast 1.5 second response time for temperature compensated readings

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This food salt meter 0-28% employs the measurement of the refractive index to determine sodium chloride concentration in aqueous solutions used in food preparation.


The HI96821 is a rugged, portable digital refractometer designed for sodium chloride (NaCl) measurement. The HI96821 displays NaCl concentration four different ways: g/100 g, g/100 mL, specific gravity, and °Baume.
The instrument’s high accuracy and simple operation give reliable results each and every time. All readings are automatically compensated for temperature variations and displayed with 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.

The HI96821 portable refractometer converts the refractive index of a food sample to g/100 g, g/100 mL, specific gravity and °Baume. These conversions are based on internationally recognized references for unit conversion. The HI96821 is ideal for the analysis of salad dressings, cheeses, condiments, canned and jarred foods, soups, brines and whey. The HI96821 is an easy to use tool for measuring sodium chloride in foods, whether on the production line or in the lab.

  • Designed for sodium chloride analysis in foods
  • Automatic Temperature Compensation
  • High accuracy measurements in g/100 g, g/100 mL, specific gravity and °Baume


Making a Standard NaCl Solution (g/100 g)

To make an NaCl 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 dried Sodium Chloride (CAS #: 7647-14-5: MW 58.44) directly into a beaker
  • Add distilled or deionized water to the beaker so the total weight of the solution is 100g

Example 10g/100 g NaCl:

NaCl (g)Water (g)Total (g)

10.00090.000100.000


Refractive Index


The HI96821 takes measurements based on a sample’s refractive index. Refractive index is a measurement of how light behaves as it passes through the sample. Depending on the sample’s composition, light will refract and reflect differently. By measuring this activity with a linear image sensor, the sample’s refractive index can be assessed and used to determine its physical properties such as concentration and density. In addition to the linear image sensor, the HI96821 uses an LED light, prism and lens to make measurement possible.

Variations in temperature will affect the accuracy of refractometry readings, so the use of temperature compensation is highly recommended for reliable results. The HI96821 contains a built-in temperature sensor and is programmed with temperature compensation algorithms in accordance with internationally recognized references which vary based on the parameter being measured.

Features at-a-glance:

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 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


Specific Gravity Range1.000 to 1.216 Specific Gravity
Specific Gravity Resolution0.001 Specific Gravity
Specific Gravity Accuracy±0.002 Specific Gravity
Sodium Chloride Range0 to 28 g/100 g; 0 to 34 g/100 mL; 0 to 26 °Baume
Sodium Chloride Resolution0.1 g/100 g; 0.1 g/100 mL; 0.1 °Baume
Sodium Chloride Accuracy±0.2 g/100 g; ±0.2 g/100 mL; ±0.2 °Baume
Temperature Range0 to 80°C (32 to 176°F)
Temperature Resolution0.1°C (0.1°F)
Temperature Accuracy±0.3 °C (±0.5 °F)
Temperature Compensationautomatic between 0 and 40°C (32 to 104°F)
Automatic Shut-Offafter three minutes of inactivity
Battery Type/Life9V / approximately 5000 readings
Dimensions192 x 102 x 67 mm (7.6 x 4.01 x 2.6”)
Weight420 g (14.8 oz.)
Refractometer Light Sourceyellow LED
Minimum Sample Volume100 μL (to cover prism totally)
Sample Cellstainless steel ring and flint glass prism
Measurement Timeapproximately 1.5 seconds
Ordering InformationHI96821 is supplied with battery and instruction manual
NotesEnclosure Rating: IP65