Alcohol refractometer Catania ATC 0 - 25 %
Catania ATC Refractometer for Mead and Fermentation (0–40% Brix / 0–25% vol.)
Want to have your mead under control from the first drop? The Catania ATC Refractometer will show you sugar content within seconds and help estimate future alcohol content even before fermentation begins. For beekeepers who value repeatable quality and stable mead strength, it's a practical helper in the workshop and at the apiary.

Forget about measuring "by eye." With this optical refractometer, you can easily monitor must preparation – whether you're fine-tuning mead, fruit wine, fruit fermentation, or beer wort.
Main advantages for beekeepers and mead producers
Two scales for quick decisions: The Brix scale (0–40%) determines sugar concentration (1°Bx = 1g sugar in 100g solution). The second scale 0–25% vol. clearly shows expected alcohol content, so you can avoid lengthy calculations when planning mead strength.
Precise values for consistent batches: Measurement with ±0.2% deviation gives you confidence that you're working with real numbers. This makes it easier to maintain the same mead style across seasons and batches.
Automatic Temperature Compensation (ATC): Fermentation and solution preparation often occur under varying conditions. ATC automatically corrects results with temperature changes (approx. 10–30°C), so you don't need to constantly deal with calibration or correction coefficients.
How to use the refractometer
The device works on the principle of light refraction. Apply a drop of sample to the prism, close the cover plate, and look toward the light. The value is immediately displayed on the scale. Operation is simple, fast, and battery-free.

Technical specifications
| Parameter | Value |
| Brix scale range (sugar content) | 0 – 40% |
| Vol. scale range (potential alcohol) | 0 – 25% |
| Measurement accuracy | ± 0.2% |
| Minimum scale division | 0.2% |
| Technology | Optical light refraction |
| Temperature compensation (ATC) | Yes (automatic) |
| Reference temperature | 20°C |
| Suitable for | Mead, fruit wines, musts, beer wort |
Important maintenance notice
The refractometer is a precise optical instrument, so it deserves gentle handling. After each measurement, rinse the prism with lukewarm water, gently wipe and dry with a soft cloth. Do not rinse the device under running water and do not immerse it – water could get into the optical part. The refractometer is usually factory-calibrated. Calibration fluid is not included in the package, but you typically don't need it immediately for regular use.
HANDHELD REFRACTOMETER
Operating instructions
HOW TO USE
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Preparation: Point the front end of the refractometer toward bright light and turn the eyepiece focusing ring until the scale is clearly visible.
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Measurement: Open the cover plate and clean the measuring surface with a piece of soft cotton flannel. Drop 1–2 drops of the measured solution. Close the cover plate and press it lightly, then read the light-shadow boundary on the corresponding scale. The reading is the numerical value of the measured liquid.
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After measurement: Clean the measuring surface and cover plate with damp gauze and carefully store the device.
WARNINGS AND MAINTENANCE
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Zero liquid and sample settings should be performed at the same temperature. If temperature changes significantly, the zero point should be set once every 30 minutes.
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After use, do not wash the device with water to prevent water from getting inside the device.
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This is a precise optical instrument. Handle it gently and take good care of it. Do not touch or scratch the optical surface. Store it in a dry, clean, and non-corrosive environment to prevent surface mold and fogging. Avoid strong impacts during transport.
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If consumers use the device according to the stated method of use, optical performance should not change.
TEMPERATURE COMPENSATION
Reference temperature is 20°C. During operation, temperature should be adjusted according to the correction table.
Models marked ATC are equipped with automatic temperature compensation. They have an additional function that allows the user to focus on measurement without worrying about temperature. The compensation range is 0~30°C.
ACCESSORIES
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Cleaning cloth
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Pipette
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Screwdriver
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Operating manual





































































































































































































