Hanna Instruments Digital Salinity Refractometer HI96821
This measuring device is primarily used in laboratories, the food industry, aquaristics and other specialist areas where precise salt content measurements are of crucial importance. Thanks to reliable measured value stability and a fast response time, the refractometer offers a high degree of accuracy that other devices on the market rarely achieve. Similar instruments specializing in digital measurement methods, such as the [Hanna Instruments Digital Refractometer HI96801], also ensure high precision, but are more focused on Brix measurements. Anyone who values high-quality and specific salt content checks is best advised to use this model.
Functionality and advantages
The refractometer measures the salt content in aqueous solutions using an optical refraction method made possible by a yellow LED and an integrated glass prism. In a matter of seconds, the device detects changes in the refractive index and converts these values into various scales, including volume percent (g/100 ml), mass percent (g/100 g), specific gravity and degrees Baumé. The integrated temperature compensation (ATC) from 10 to 40 °C guarantees accurate results even at varying ambient temperatures. For example, salt concentration and temperature can be quickly checked in a single work step.
A clear advantage of digital measurement is its reliability and repeatability. Unlike manually read scale measurements, which can be heavily dependent on subjective impressions, the device's electrical evaluation system is less prone to errors. In addition, operation is very simple with just a few input steps and even inexperienced users can quickly find their way around. A compact housing to IP65 standard ensures that the measuring instrument remains protected against splash water and other environmental influences. Comparable models such as the [Hanna Instruments Digital Refractometer HI96811] also have similar designs, but offer different measuring ranges for alternative applications.
Technical highlights
- Measuring range salinity: 0-28 g/100 g, 0-34 g/100 ml (vol%), 1.000-1.216 specific gravity, 0-26 °Baumé
- Resolution: up to 0.1 g/100 g or 0.1 g/100 ml and 0.001 specific gravity
- Accuracy: ±0.2 g/100 g or ±0.2 g/100 ml and ±0.002 for specific gravity
- Automatic temperature compensation: 10-40 °C
- Fast response time: approx. 1.5 seconds
- IP65-protected housing against dust and splash water
- Power supply: 9V battery for around 5000 operating hours
In addition, the minimum of just two drops of sample proves to be particularly practical, reducing sample consumption in everyday laboratory work. The yellow LED light beam and the stainless steel frame of the glass prism are designed for a long service life and ensure consistently high measurement accuracy. The automatic switch-off function after three minutes also saves energy and therefore increases battery life, which reduces costs in the long term.
Certifications and standards
The refractometer is developed and manufactured in accordance with current quality and safety standards. A robust IP65 housing is an important component, as it provides protection for the internal measuring sensors even under demanding operating conditions. At the same time, it meets the requirements of professional laboratory and production environments, where splash protection and temperature-dependent precision are essential.
Application examples
- Food analysis: Determination of salt content in cheese, canned vegetables and soy sauces.
- Aquaristics and seawater research: monitoring salinity in seawater tanks to create optimal conditions for fish, corals and invertebrates
.
- Beverage industry: checking the salt content in beverages for quality assurance, for example in special isotonic liquids.
- Research and teaching: Use in laboratory facilities to investigate different salt concentrations in experiments with sodium chloride.
FAQ
How much sample volume is required
Only two drops are sufficient. This makes the device particularly economical in terms of sample consumption and ideal for precious or limited-availability substances.
Can the device also be used outdoors?
The IP65 protection class means that the measuring device is splash-proof and can be used in production environments or outdoors. However, it is always advisable to protect it from dirt and intense moisture.
How quickly does the device display measurement results?
The integrated microprocessor calculates the measured value in around 1.5 seconds. The results can be read immediately on the digital display.
Does a special calibration need to be carried out?
Calibration with distilled or deionized water is usually sufficient. Nevertheless, when used in widely varying environments, it should be checked regularly whether recalibration is necessary.
Conclusion
This digital refractometer meets demanding requirements in terms of precision, reliability and ease of use. Its wide measuring range covers numerous applications, whereby the robust design and rapid measured value display are particularly impressive. Specialist users benefit from comprehensive automation and high measurement accuracy, which can be easily integrated into everyday work.
