Hanna HI96803 Digital Refractometer for % Glucose by Weight Analysis

This state-of-the-art refractometer incorporates key features that enhance its performance and ease of use. It boasts a dual-level LCD that simultaneously displays the glucose concentration and the temperature. The instrument also includes Automatic Temperature Compensation (ATC), which ensures that all readings are reliable and consistent, even when the sample temperature fluctuates. This critical function is based on methodology recommended by the ICUMSA Methods Book, ensuring professional-grade accuracy. A low-power indicator and an automatic shut-off feature after three minutes of non-use further contribute to the device’s practicality and battery longevity.

The Core of Refractive Index Measurement

The HI96803 functions on the principle of refractive index measurement, which is a fundamental optical characteristic of a substance that correlates with the number of dissolved particles within it. Refractive index is defined as the ratio of the speed of light in a vacuum to its speed within a specific substance. When light passes from one medium to another with a different refractive index, it “bends” or changes direction, a phenomenon known as refraction. The HI96803 measures a specific phenomenon called the “critical angle,” which is the angle at which a light beam can no longer refract and is instead reflected. This critical angle is directly related to the refractive index of the sample.

Inside the HI96803, a yellow LED light source shines a beam through a prism that is in contact with the sample. A linear image sensor then detects the critical angle at which the light ceases to pass through the sample. This measurement, combined with automatic temperature compensation, allows the instrument to precisely calculate and display the glucose concentration as a percentage by weight. This method provides a fast, accurate, and repeatable way to measure sugar content, making it an indispensable tool for quality control in various industries.

Practical Applications in the Food Industry

The HI96803 Digital Refractometer is an essential tool for quality control and analysis in a wide range of food-related applications. Its ability to accurately measure the percentage of glucose by weight makes it particularly valuable for products where sugar content is a critical parameter. For instance, it is widely used for the analysis of fruits, ensuring ripeness and sweetness levels are optimal for harvesting or processing. In the beverage industry, it helps monitor sugar concentrations in energy drinks and fruit juices to meet regulatory and quality standards.

Furthermore, the refractometer is highly effective for testing jams, jellies, and marmalades, where maintaining a consistent and specific sugar level is crucial for texture, preservation, and taste. Honey producers also rely on this device to check glucose content, a key factor in assessing purity and quality. The HI96803 is also useful for analyzing puddings, soy milk, soups, tofu, and various condiments, providing a quick and reliable method to ensure product consistency and nutritional information accuracy. Its ease of use and portability allow for on-the-go measurements, whether in the field or in a bustling production laboratory.

The Convenience of the Hanna HI96803

The HI96803 is designed with user convenience at the forefront. Its operation is simplified to just two buttons: one for calibration and one for measurement. The ZERO key is used for a simple one-point calibration with distilled or deionized water, which should be performed daily or after a battery change to ensure maximum accuracy. The READ key instantly provides a measurement, with results displayed in approximately 1.5 seconds. The instrument is also equipped with an IP65 water-resistant casing, making it durable and suitable for use in demanding environments.

The device is also designed for easy maintenance and cleaning. The sample well, made of a stainless steel ring with a flint glass prism, is corrosion-resistant and can be easily wiped clean with a soft tissue. A small sample volume of just 100 µL is required to cover the prism, which means less waste and more efficient testing. The instrument’s automatic shut-off feature and low battery indicator help preserve battery life, ensuring it’s always ready for use.

Ensuring Accuracy with Calibration

Proper calibration is essential for maintaining the accuracy of the HI96803 refractometer. The device’s calibration procedure is straightforward and should be performed regularly. To calibrate, the user simply adds a few drops of distilled or deionized water to the stainless steel sample well, ensuring the prism is fully covered. Then, the ZERO key is pressed. The instrument will display a “0.0” reading, confirming that it is calibrated and ready for use.

This simple process ensures that the instrument’s baseline measurement is correct, accounting for any potential environmental or instrument-related variations since the last calibration. It is recommended to perform this calibration daily, especially if the device has been subjected to significant temperature changes or if a long series of measurements is planned. The calibration setting is saved even when the instrument is turned off, providing added convenience.

Making a Standard Glucose Solution

For laboratory or quality control purposes, it is often necessary to create a standard glucose solution for verification and testing. The manual provides a clear procedure for this. To create an X% w/w glucose solution, one must first place a container on an analytical balance and tare it. Then, X grams of high-purity glucose are weighed directly into the container. Finally, distilled or deionized water is added until the total weight of the solution reaches 100 grams.

The manual notes that solutions with a high glucose concentration, particularly above 20%, may require vigorous stirring or heating in a water bath to ensure the glucose is fully dissolved. An example is provided for a 25% glucose solution, demonstrating that 25 grams of glucose and 75 grams of water are needed to create a total solution of 100 grams. This detailed method ensures that users can create reliable standard solutions for accurate and consistent testing.

Trust in Hanna Instruments’ Quality and Support

Hanna Instruments is a globally recognized manufacturer of analytical instruments, and the HI96803 is a testament to their commitment to quality and customer satisfaction. The company provides a two-year warranty for the refractometer, covering defects in workmanship and materials under normal use and maintenance. This warranty underscores the product’s durability and the company’s confidence in its design and construction.

For technical support, Hanna Instruments offers a worldwide contact list and an email for technical inquiries, ensuring that customers have access to expert assistance whenever needed. The company’s dedication to support is evident in its clear instructions for service, including obtaining a Returned Goods Authorization number for repairs not covered by the warranty. This comprehensive support system provides customers with peace of mind, knowing that their investment is backed by a reputable and responsive manufacturer.

The Ultimate Online Shopping Experience with tpt24

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