Digital Refractometer for Measuring Sodium Chloride in Food
- Hanna instruments - HI96821
- 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
Digital Refractometer for Measuring Sodium Chloride in Food - HI96821
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
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.
Features
- 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 Range | 1.000 to 1.216 Specific Gravity |
| Specific Gravity Resolution | 0.001 Specific Gravity |
| Specific Gravity Accuracy | ±0.002 Specific Gravity |
| Sodium Chloride Range | 0 to 28 g/100 g; 0 to 34 g/100 mL; 0 to 26 °Baume |
| Sodium Chloride Resolution | 0.1 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 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) |
| Automatic Shut-Off | after three minutes of inactivity |
| Battery Type/Life | 9V / approximately 5000 readings |
| Dimensions | 192 x 102 x 67 mm (7.6 x 4.01 x 2.6") |
| Weight | 420g (14.8 oz) |
| Refractometer Light Source | yellow LED |
| Minimum Sample Volume | 100 µL (to cover prism totally) |
| Sample Cell | stainless steel ring and flint glass prism |
| Measurement Time | approximately 1.5 seconds |
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