Atago 2757 MASTER-VET Urine Specific Gravity and Serum Clinical Refractometer for Dogs and Cats

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Urine specific gravity and blood serum protein of dogs and cats can be quickly measured with a single drop of sample.Equipped with automatic temperature compensation (ATC) feature, and water resistance (IP65) feature that allows for the unit to be rinsed under running water for easy clean-up after measurement. 

  • Animal Urine Specific Gravity
Measurement RangeUrine.S.G.(Dog) : 1.000~1.060
Urine.S.G.(Cat) : 1.000~1.080
Serum protein scale : 0.0~14.0g/100mL
ResolutionUrine.S.G. : 0.001
Serum protein scale : 0.2
Measurement AccuracyUrine.S.G. : ±0.002
Serum protein scale : ±0.4(10 to 30℃)
Measurement Temperature5 to 40℃
International Protection ClassIP65 (except eye piece) Dust-tight and Protected against water jets.
Dimensions & Weight32(D)×34(H)×168(W)mm, 90g

Quantity Break Pricing:
1 items £365.00 / each  
2-4 items £283.50 / each save 22.33%
5-9 items £236.25 / each save 35.27%
10 or more items £220.50 / each save 39.59%
  • £365.00

Product Line-Up

Reason to choose MASTER series

Water resistant(α & H series)

Water resistant

"Washable". A special design concept for analog type measuring instruments. It is a new mechanism that can be washed even under running water after measurement.



The readability of measured values is the "lifeline" for hand-held refractometer.Not only the brightness of the entire field of view, but also the clarity of the boundaries represents the basis of the optical technology that ATAGO has reached.

Contamination free

Contamination free

Uses a smooth grip with no irregularities. The carbon-like design contributes to both cleanliness and playfulness.

ATC Temperature compensation(α・H・T series)

The measured value are automatically corrected according to the environment. We have thoroughly improved the structure and arrived at a mechanism, patented that is not found anywhere else.

Function and Design


Measurement Method

    • SKU
    • UPC/ISBN
    • Commodity Codes
  • Measurement Range
    Urine.Specific Gravity (Dog) : 1.000~1.060, Serum protein scale : 0.0~14.0g/100mL, Urine.Specific.Gravity (Cat) : 1.000~1.080
  • Measurement Accuracy
    Urine.S.G. : ±0.002, Serum protein scale : ±0.2
  • Measurement Temperature (°C)
    5 to 40℃
  • Body Material
    Plastic body : PBT (Polybutylene terephthalate), resistant to salty and acidic samples
  • Other Features
    α : Water resistant (IP65)
  • Use
    Blood Serum Protein, Urine (Specific Gravity)
  • International Protection Class
  • Manufacturer
    Atago Co Ltd
  • Country of Origin


The name "MASTER" says it all. The MASTER series integrates 76 years of manufacturing expertise into these state-of-the-art instruments. The researchers at ATAGO have addressed the requests of users in 154 countries around the world, and the MASTER series is the embodiment of this extensive research and development. The MASTER series rates 100% in fulfilling both user expectation and illustrating ATAGO's researchers' desire to design the best hand-held refractometer possible.

1. Water Resistant

The concept of a washable hand-held analog unit is exceptional. After measuring, you can clean it with running water under a faucet. The new structural-design of these units allows them to be washed whenever necessary. The MASTER Series is the epitome of user friendliness.

2. Visibility

Efficiently using an analog unit depends on how easily the measured value can be read. With extensive research and the utilization of quality optics, the result is a view of the measurement scale that is very bright, creating a high contrast to see clearly where the boundary intersects the memory lines of the scale. The scale numbers are also large and easy to read. Imitation instruments produced in China cannot compare to the durability, quality or accuracy of ATAGO instruments. Maintaining high standards of quality and attention to detail is the difference which is as clear as the scale of the MASTER units.

3. Contamination Free

The MASTER Series was also designed with a smooth and easy-to-clean grip, eliminating the possibility of food and other samples being trapped which can result in contamination and bacterial growth. The steel and carbon-fiber design is both functional and stylish.

4. Automatic Temperature Compensation

The Automatic Temperature Compensation (ATC) system was also reviewed and improved. This new system allows the MASTER series to have improved accuracy that out performs similar units. While developing the MASTER series, there were many discussions, data gathering of countless tests, and repeated setbacks that our development team had to - and did - overcome. Through this process, ATAGO has applied for a patent on the design of the improved ATC system. Ultimately, the MASTER series reads more accurately than any comparable unit in the market.

5. Endurance

The MASTER Series has passed all water resistance, dust resistance, and drop tests. Instruments were subjected to water jets from four directions, dropped from a height of one meter onto an oak platform, and withstood the pressure changes of air travel. The only replacement part for the MASTER series is the daylight plate and the instruments do not utilize consumable parts or materials, thus keeping the cost for replacement parts to a minimum.

6. Automatic Sample Distribution (ASD)

People who frequently use refractometers have noticed that the daylight plate can get in the way when placing a sample on the prism. To address this problem, ATAGO has developed a spoon-shaped tip, which makes applying the sample easy, and helps to spread the sample across the prism on its own. This makes the instrument even more user-friendly. (Patent Granted)

7. Repair and Service

ATAGO has established a close network of customers by providing excellent customer service support. When an ATAGO instrument needs servicing, not only is each customer treated with respect, but they are also provided with detailed methods and user-specific suggestions on sampling and taking measurements, based on individual needs. ATAGO has refined our user-friendly approach not only to improve our instruments, but to also support our valued customers. ATAGO has many excellent Authorized Service Centers worldwide.

8. Reputation for Quality

ATAGO has built a firm reputation for reliability and quality during its 76-year history. We are a strong company that exports to over 154 countries with continued growth expectations. We have received ISO certification, and our integrated system for producing and marketing our products, based on the "Plan-Do-Check-Act" cycle, is essential in promoting the ATAGO name.
ATAGO products have been awarded “AAA”, the highest rank offered by Standard & Poor's Japan SME Grading for 2 consecutive years.

We at ATAGO are confident that the MASTER series will surpass your expectations.