Atago 2771 MASTER-SUR/Nα Clinical Refractometer, Metal Body, Water Resistant IP65, Urine S.G 1.000-1.060 Serum Protein 0.0-12.0 g/100mL Refractive Index (nD) 1.3330-1.3660 Range
Application
Urine Specific Gravity & Serum Protein
Specifications
Model | MASTER-SUR/Nα |
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Cat.No. | 2771 |
Scale | Urine S.G. Serum protein Refractive index |
Range | Urine S.G. scale : 1.000 to 1.060 Serum protein scale : 0.0 to 12.0g / 100mL Refractive index scale (nD) : 1.3330 to 1.3660 (Automatic Temperature Compensation) |
Minimum Scale | Urine S.G. scale : 0.001 Serum protein scale : 0.2g / 100mL Refractive index scale (nD) : 0.0005 |
Accuracy | Urine S.G. scale : ±0.001 Serum protein scale : ±0.2g / 100mL Refractive index scale (nD) : ±0.0005 (10 to 30°C) |
Options
* Calibration Certificate : Contact an ATAGO representative for details.
Parts
· Daylight plate : RE-2315-61M
Design Registration No.000379326-0001, 000379326-0002 (EU)
ZL 2005 3 0116403.4,5 (China), D111526 (Taiwan), D555, 549 (U.S.A.),
1255763, 1255764, 1255765, 1255766, 1255767 (Japan)
Patent Granted in countries around the world.





The MASTER-SUR/Nα is designed for clinical purposes: "Serum Protein", "Specific Gravity of Urine" and "Refractive Index". The plastic body model is designed to be resistant salty and acidic samples. It is an Automatic Temperature Compensation (ATC) model with water resistant properties (IP65).
How to choose suitable model?
Step❶
⒈ Please select category, suitable samples or measurement range from the list of MASTER series⒉ If you are not sure the range of your sample, please refer to our data book
Step❷
Please select the material⒈ Metal body : Die-cast aluminum, Ideal for the agriculture industry, metal working fluids and various high-temperature samples
⒉ Plastic body : PBT (Polybutylene terephthalate), resistant to salty and acidic samples
Step❸
Please select features- α : Water resistant (IP65)
- T : Automatic temperature compensation (ATC)
- M : Low cost model without the above function
- S : Suitable for Milky sample
![]() | Protection class of the MASTER-α, H series are IP65. You can rinse off the sample by running water on the prism. The design allows the user to easily wipe off the sample. | ![]() | Sample size 2-3 drops. |
![]() | The Automatic Temperature Compensation function of the MASTER-α, T, H series enables you to take measurement readings regardless of the ambient temperature. | ![]() | Automatic Sample Distribution (ASD) New prism housing design allows for sample to cover the prism without having to lift the day-light plate! This design will allow for fast & easy measurements. |
![]() | Convenient Storage case. |
The MASTER series has been improved with a clearer, brighter field of view and made even easier to carry.

Compact Redesign of the MASTER Series (from October 2014)
The MASTER series has been improved with a clearer, brighter field of view and made even easier to carry.
These improvements in our newly compact redesigned models are especially clear when taking measurements in dim lighting, or measuring darkly-colored samples. Even when measuring milky-colored, opaque, or oily samples, the boundary line remains crisp and clear.
Note: The size of the scale has changed. It may take some time to re-adjust to the new field of view when reading measurements.
EXPLANATION OF ICONS
Icons, for functions, specifications and scales have been added to this catalog
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Measurement RangeUrine S.G. scale : 1.000 to 1.060 Serum protein scale : 0.0 to 12.0g / 100mL Refractive index scale (nD) : 1.3330 to 1.3660
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Measurement AccuracyUrine S.G. scale : ±0.001 Serum protein scale : ±0.2g / 100mL Refractive index scale (nD) : ±0.0005 (10 to 30°C)
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Body MaterialMetal body : Die-cast aluminum, Ideal for the agriculture industry, metal working fluids and various high-temperature samples
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Other Featuresα : Water resistant (IP65)
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ManufacturerAtago Co Ltd
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Country of OriginJapan