KERN ORA 3AA Analogue Refractometer
The KERN ORA 3AA Analogue Refractometer is designed for professionals in breweries, laboratories and food analysis who require reliable measurements of the refractive index and precise analyses of sugar content. With its robust, compact design and automatic temperature compensation, the hand-held refractometer offers a clear advantage over other analogue devices: it simplifies the determination of the concentration of numerous liquids in daily routine operations and guarantees consistently accurate results - even with changing ambient temperatures. Compared to digital and sensitive devices in particular, this instrument impresses with its maintenance-free design, high precision and user-friendly operation, which ensures a long service life even under harsh production conditions.
With its analogue measuring system and finely divided Brix scale, the hand-held refractometer is ideally suited to the requirements of the beverage and food industry. It enables the sugar content in beer wort or fruit juices to be determined in a matter of seconds and impresses with high measurement results even at fluctuating temperatures thanks to the integrated ATC system. Automatic temperature compensation guarantees reproducible values in the temperature range from 10 °C to 30 °C, making it ideal for rough use in the laboratory or in production. Technical highlights at a glance
Analogue scale technology for direct reading of Brix and original wort values Brix measuring range: 0% to 32% (division: 0.20%) Original wort range offered: 1.000 to 1.130 (specific gravity)
Automatic temperature compensation (ATC) from 10 °C to 30 °C Compact housing dimensions: 198 x 40 x 40 mm, weight: 0.30 kg Maintenance-free due to no electronics, no external power supply required
Delivery includes calibration solution, pipette, screwdriver, cleaning cloth and protective storage box The individually pre-installed scales for Brix and original wort prevent measurement errors due to conversion and enable quick comparisons directly on the device. A robust prism block with a special cover minimises measurement deviations and ensures accurate results with clear scale lines. The eyepiece focus can be adjusted to any visual acuity with a quick turn - ideal even in busy working environments.
As the device is manufactured in accordance with current industry standards and focuses on standardised precision, it can be easily integrated into QA and ISO processes. Users are advised to perform regular calibration in accordance with ISO guidelines in order to maintain measurement reliability.
Certifications and quality standards
The handheld refractometer is designed for professional use in the food, chemical and brewing industries. It meets the requirements for measurement accuracy and reliability that are mandatory in the food and brewing industries according to ISO and industry-specific standards. For continuous process control, documented calibration within the quality assurance process is recommended.
Typical areas of application and examples of use
This instrument can be used to analyse a wide variety of liquids easily and accurately. The focus is on applications in food and beverage production, but it also demonstrates its strengths in everyday laboratory work and chemical analysis:
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Beer production: Monitoring the original wort content before fermentation; direct measurement of the malt extract.
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Food analysis: Quality testing and control of the Brix value in fruit juices, honey and syrup to ensure the optimum sugar content.
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Production-accompanying quality assurance: Immediate control of process media such as sugar or salt solutions, even in changing environments thanks to ATC.
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Chemical-technical analysis: Determination of the refractive index during the development of recipes or batch testing in the laboratory, especially when reliable values without digital components are required.
The measuring device is frequently used with liquids such as malt extract, sucrose solutions, fructose solutions and honey.
FAQs
How do I calibrate the refractometer correctly?
Use the calibration solution provided. Drop it onto the prism, close the cover and set the scale to zero using the screwdriver. This ensures a reliable basis for subsequent measurement series.
Does the device require a power source?
No, the refractometer is completely analogue and does not require any power source, neither batteries nor a mains connection. This makes it particularly flexible and low-maintenance.
How can I clean the device?
After each use, carefully wipe the prism and cover with the cleaning cloth provided. Do not use aggressive cleaning agents to avoid damaging the glass surface.
How are temperature fluctuations compensated for?
The built-in automatic temperature compensation ensures accurate and comparable results between 10 °C and 30 °C by automatically compensating for temperature fluctuations.
Conclusion
The analogue handheld refractometer from Kern & Sohn is a reliable and durable solution for fast and accurate determination of Brix and original gravity values as well as refractive indices in laboratories and during production. Thanks to its solid construction, intuitive operation, automatic temperature compensation and maintenance-free design, it is particularly suitable for users who value precise measurement technology, robustness and user-friendliness. This device is an excellent choice for chemical-technical applications, the food industry and brewing.
