Original, Irreplaceable, A true classic
By very simple operation that needs only to set the boundary line of refraction at the cross hairs, this refractometer directly indicates a measured value (in refractive index or Brix (%), selective) in digits together with temperature on the display. This refractometer enables anybody to carry out measurement easily without reading of analog graduation.
ATAGO's Abbe Refractometers are widely used in a variety of fields; from basic research to product management
Uses and Application
For measuring the refractive index (nD) of liquid samples between 5 to 50˚C: |
DR-A1, DR-A1-Plus, and NAR-1T LIQUID. We recommend the NAR-3T for high-accuracy measurements. |
For measuring the refractive index (nD) of liquid samples up to 120˚C: |
NAR-2T |
For measuring the refractive index (nD) of solid samples (glass, plastics, films, etc.): |
NAR-1T SOLID, DR-A1, and DR-A1-Plus. The NAR-3T is also capable of measuring clear, translucent glass or plastics. |
For measuring liquid or solid samples with a high refractive index (1.47 to 1.87): |
NAR-4T |
For measuring and determining the refractive index or Abbe number of liquid or solid samples at different wavelengths: |
DR-M Series: DR-M2, DR-M2/1550, DR-M4, and DR-M4/1550 (For high refractive index measurements.) |
For determining average dispersion values or abbe numbers: |
NAR-1T SOLID, NAR-2T, and NAR-3T |
For measuring Brix (%): |
DR-A1, DR-A1-Plus, and NAR-1T LIQUID. We recommend the NAR-3T for high-accuracy measurements. |
For connecting to a printer: |
DR-A1, DR-A1-Plus, and DR-M Series |
For measuring birefringent (double refraction) samples (plastics, films) that have different refractive indices depending on their orientation, or for measuing the ordinary ray (n subscript null) or extraordinary ray (n subscript exponential) of liquid crystals (LCs): |
DR-A1, DR-A1-Plus, NAR-1T SOLID, NAR-2T, NAR-4T, and DR-M Series |
ATAGO Products Conform to ASTM Standards
Please contact ATAGO for further details.
D542 | STM for Index of Refraction of Transparent Organic Plastics |
D1045 | STM for Sampling and Testing Plasticizers Used in Plastics |
D1218 | STM for Refractive Index and Refractive Dispersion of Hydrocarbon Liquids |
D1416 | STM for Rubber from Synthetic Sources--Chemical Analysis |
D1747 | STM for Refractive Index of Viscous Materials |
D3321 | STM for Use of the Refractometer for Field Test Determination of the Freezing Point of Aqueous Engine |
D44095 | STM for Use of the Refractometer for Determining Nonvolatile Matter (Total Solids) in Floor Polishes |
D5006 | STM for Measurement of Fuel System Icing Inhibitors (Ether Type) in Aviation Fuels |
D5775 | STM for Rubber from Synthetic Sources-Bound Styrene in SBR |
Technical Specifications
This model features a brighter field of view than its predecessor the DR-A1, making it easier to measure inhomogeneous and/or dark samples.By very simple operation that needs only to set the boundary line of refraction at the cross hairs, this refractometer directly indicates a measured value in refractive index or Brix (%). This model enables to carry out measurement easily without reading of analog graduation.It can be connected to a printer and computer.Please note that dispersive value cannot be measured by this refractometer. |
This is the Abbe Rerfactometer for liquid sample measurement only. The NAR-1T LIQUID is for liquid sample measurement only. This model has the Refractive Index scale and Brix scale, and operates with D line (589nm) light source. Calibration is performed using distilled water. |
This is suitable to measure the Refractive Index Scale and the BRIX scale for liquid and solid samples. The NAR-1T SOLID Abbe Refractometer was designed for solid sample measurement (this model can also measure liquid samples).This model has the Refractive Index scale and Brix scale, and operates with D line (589nm) light source.
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Designed for use with compounds that require measurement at high temperatures (up to 120°C). Capable of measuring samples from 5 to 120°C, such as substances with a melting point higher than room temperature, or compounds containing substances with a transition temperature below 120°C. Aside from liquid samples, glass, films, plastics and other solid samples can also be measured. |
The NAR-3T is the unit with the highest degree of precision and accuracy among the Abbe Refractometers. It was developed to give improved measurement accuracy and ease of use. This was achieved by making fundamental improvements to the optical system and utilizing a larger scale, which allows for a refractive index scale measurements of up to 0.00005. Incorporating a high intensity lamp and using a double control knob gives quick and more accurate control. |
Research and Development on new materials for modern technologies is being actively conducted in every industry. Many of these materials (especially polymer film and related materials) are of high refractive index - often too high for the existing Abbe refractometers. These can now be measured with the nD 1.4700 to 1.8700 range of the NAR-4T. *Dispersion values cannot be measured with this unit. |
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Model | DR-A1-Plus | NAR-1T LIQUID | NAR-1T SOLID | NAR-2T | NAR-3T | NAR-4T | NAR-2T・LO |
Cat.No. | 1311 | 1211 | 1212 | 1220 | 1230 | 1240 | 1227 |
Scale | Refractive Index Brix Temperature |
Refractive Index Brix |
Refractive Index Brix |
Refractive Index Brix |
Refractive Index Brix |
Refractive Index | Refractive Index |
Measurement Range | Refractive index (nD) : 1.3000 to 1.7100 Brix : 0.0 to 100.0% (Automatic Temperature Compensation is executed at 5 to 50°C) |
Refractive index (nD) : 1.3000 to 1.7000 Brix : 0.0 to 95.0% |
Refractive index (nD) : 1.3000 to 1.7000 Brix : 0.0 to 95.0% |
Refractive Index (nD) 1.3000 to 1.7000, Brix 0.0 to 95.0% |
Refractive Index (nD) 1.30000 to 1.71000, Brix 0.00 to 95.00% |
Refractive Index (nD) 1.4700 to 1.8700 | Refractive index (nD) : 1.1500 to 1.4800 |
Minimum Scale | Refractive Index (nD) : 0.0001 Brix : 0.1% |
Refractive Index (nD) : 0.001 Brix : 0.5% |
Refractive Index (nD) : 0.001 Brix : 0.5% |
Refractive Index (nD) 0.001, Brix 0.5% | Refractive index (nD) : 0.0002 Brix : 0.1% |
Refractive Index (nD) 0.001 | Refractive Index (nD) : 0.001 |
Measurement Accuracy | Refractive index (nD) : ±0.0002 Brix : ±0.1% |
Refractive index (nD) : ±0.0002 Brix : ±0.1% |
Refractive index (nD) : ±0.0002 Brix : ±0.1% |
Refractive Index (nD) ±0.0002, Brix ±0.1% | Refractive index (nD) : ±0.0001 Brix : ±0.05% |
Refractive Index (nD) ±0.0002 | Refractive index (nD) : ±0.0002 |
Average Dispersion Value | nF-nC (to be calculated according to conversion table) | nF-nC (to be calculated according to conversion table) | nF-nC (to be calculated according to conversion table) | nF-nC (to be calculated according to conversion table) | nF-nC (to be calculated according to conversion table) | ||
Ambient Temperature | 5 to 40°C | 5 to 40℃ | |||||
Indication | Refractive index (nD) or Brix (%) and temperature (°C) | ||||||
Digital Thermometer | ±0.2°C | Indication range: 0.0 to 50.0°C (Accuracy:±0.2°C, Minimum indication: 0.1°C) |
Indication range: 0.0 to 50.0°C (Accuracy:±0.2°C, Minimum indication: 0.1°C) |
Indication range: 0.0 to 120.0゚C (Accuracy:±0.2゚C(0~100゚C), ±0.5゚C (100~120゚C), Minimum indication: 0.1゚C) |
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Measurement Temperature Range | 5 to 50°C (at unit of 0.1°C) (Temperature range available of the circulating water) |
5 to 50°C (Temperature range available of the circulating water) | 5 to 50°C (Temperature range available of the circulating water) | 5 to 120°C (Temperature range regulated by circulating constant temperature water bath.) |
5 to 50゚C (Temperature range available of the circulating water) |
5 to 50゚C (Temperature range available of the circulating water) |
0 to 120゚C (Temperature range available of the circulating water) |
Light source | LED (Approximating to wavelength of D-Line) | LED Lamp (Approximating to wavelength of D-Line) | LED Lamp (Approximating to wavelength of D-Line) | LED Lamp (Approximating to wavelength of D-Line) | LED Lamp (Approximating to wavelength of D-Line) | LED Lamp (Approximating to wavelength of D-Line) | LED (Approximating to wavelength of D-Line) |
Output | (1) Digital Printer DP-63(C) (Optional) is used. (2) Communication syste : RS-232C |
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Power Supply | With AC adapter (100 to 240V (50/60Hz) AC input) | AC100 to 240V, 50/60 Hz, 5VA (Digital Thermometer, Model DTM-N) |
AC100 to 240V, 50/60 Hz, 5VA (Digital Thermometer, Model DTM-N) |
AC100 to 240V, 50/60 Hz, 5VA (Digital Thermometer, Model DTM-N) |
AC100 to 240V, 50/60 Hz, 5VA (Digital Thermometer, Model DTM-N) |
AC100 to 240V, 50/60 Hz, 5VA (Digital Thermometer, Model DTM-N) |
AC100 to 240V , 50/60Hz |
Dimensions & Weight | 13×29×31cm, 6.0kg (Refractometer) 10.5×17.5×4cm, 0.7kg (AC adapter) |
Refractometer 13(W) x 18(D)x 23(H)cm 1.8Kg (main unit only) Digital thermometer 10(W)x 11(D)x7(H)cm 0.5kg |
Refractometer 13(W) x 18(D)x 23(H)cm 1.8Kg (main unit only) Digital thermometer 10(W)x 11(D)x7(H)cm 0.5kg |
Refractometer 13(W) x 18(D)x 23(H)cm 1.8Kg (main unit only) Digital thermometer 10(W)x 11(D)x7(H)cm 0.5kg |
Refractometer 13(W) x 18(D)x 23(H)cm 1.8Kg (main unit only) Digital thermometer 10(W)x 11(D)x7(H)cm 0.5kg |
Refractometer 13(W) x 18(D)x 23(H)cm 1.8Kg (main unit only) Digital thermometer 10(W)x 11(D)x7(H)cm 0.5kg |
12×20×25cm, 5.8kg (Refractometer) 10×11×7cm, 0.5kg (Thermometer) |
Power consumption | 16VA | 5VA | |||||
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The Abbe refractometer is a classic optical instrument used to measure the refractive index of liquids or solids. Abbe refractometers are routinely used in modern chemistry labs for identifying chemical compounds. The instrument is based on the principle of total internal reflection (TIR).
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ManufacturerAtago Co Ltd
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Country of OriginJapan
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Measurement RangeRefractive Index (nD) 1.3000 to 1.7100, Brix 0.0 to 100.0% (ATC is executed at 5 to 50°C), Refractive Index (nD) 1.3000 to 1.7000, Brix 0.0 to 95.0%, Refractive index (nD) : 1.4700 to 1.8700, Refractive Index (nD) 1.30000 to 1.71000, Brix 0.00 to 95.00%, Refractive index (nD) : 1.1500 to 1.4800
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Measurement AccuracyRefractive Index (nD) ±0.0002, Brix ±0.1%, Refractive Index (nD) ±0.0001, Brix ±0.05%, Refractive Index (nD) ±0.0002
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ModelDR-A1-Plus, NAR-1T LIQUID, NAR-1T SOLID, NAR-2T, NAR-3T, NAR-4T, NAR-1T・LO, NAR-2T・LO, NAR-2T・HI
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ScalesRefractive Index and Brix, Refractive Index
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Measurement Temperature5°C To 50°C, 5°C To 120°C