STANDARD ACCESSORIES
DR-A1

DR-A1-Plus

Test piece ··········································································· 1 pc
Contact liquid [monobromonaphthalene] (4mL) ··················· 1 pc
Allen wrench for detaching/attaching prism ························ 1 pc
Lighting adapter for solid sample ········································ 1 pc
Tube band ······································································ 10 pcs
AC adapter (AD-13) ···························································· 1 pc
AC cable ············································································ 1 pc
Instruction manual ······························································ 1 pc

NAR-1T SOLID

NAR-1T LIQUID

Test piece ··········································································· 1 pc
Contact liquid [monobromonaphthalene] (4mL) ··················· 1 pc
Allen wrench for detaching/attaching prism ························ 1 pc
Lighting adapter for solid sample ········································ 1 pc
Tube band ······································································ 10 pcs
AC adapter (AD-13) ···························································· 1 pc
AC cable ············································································ 1 pc
Instruction manual ······························································ 1 pc

NAR-2T

Digital thermometer ···························································· 1 pc
AC power cable ·································································· 1 pc
Lamp cable ········································································ 1 pc
LED lamp ········································································· 3 pcs
Test piece ··········································································· 1 pc
Contact liquid [monobromonaphthalene] (4mL) ··················· 1 pc
Special screwdriver calibration ············································ 1 pc
Milky white reflector ···························································· 1 pc
Tube band ······································································ 10 pcs
Instruction manual ······························································ 1 pc

NAR-4T

DR-M2 DR-M4

Digital thermometer ···························································· 1 pc
AC power cable ·································································· 1 pc
Lamp cable ········································································ 1 pc
LED lamp ········································································· 3 pcs
Allen wrench for calibration ················································· 1 pc
Test piece ··········································································· 1 pc
Contact liquid [monobromonaphthalene] (4mL) ··················· 1 pc
Air purger for dehumidfication ············································· 1 pc
Tube band ······································································ 10 pcs
Instruction manual ······························································ 1 pc

DR-M2/1550 DR-M4/1550

Test piece ··········································································· 1 pc
Allen wrench ······································································· 1 pc
Contact liquid [monobromonaphthalene] (4mL) ··················· 1 pc
Contact liquid[methylene iodide containing sulfur solution] (4mL) * ··········· 1 pc
Interference filter, 589nm ···················································· 1 pc
Lighting glass for film measurement ···································· 1 pc
Spare bulb ·········································································· 1 pc
Tube band ······································································ 10 pcs
Instruction manual ······························································ 1 pc
*For DR-M4 only

Near infrared ray viewer ······················································ 1 pc
Mounting adapter ······························································· 1 pc
Monochromatic light source device ··································· 1 set
Test piece ··········································································· 1 pc
Allen wrench ······································································· 1 pc
Contact liquid [monobromonaphthalene] (4mL) ··················· 1 pc
Contact liquid[methylene iodide containing sulfur solution] (4mL) * ··········· 1 pc
Interference filter, 589nm ···················································· 1 pc
Interference filter frame for 589nm ······································ 1 pc
Tube band ······································································ 10 pcs
Lighting glass for film measurement ···································· 1 pc
Instruction manual ······························································ 1 pc
*For DR-M4/1550 only

OPTIONAL PARTS Eyepiece For Polarizing

Parts No. RE-1146

Page 3

 Interference Filters for MULTI-WAVELENGTH ABBE REFRACTOMETERS(Standard accessory only 589nm)

DR-A1 <DIGITAL>
DR-A1-Plus <DIGITAL>
NAR-1T LIQUID
NAR-1T SOLID
NAR-2T <HIGH TEMPERATURE MODEL>
NAR-3T <PRECISION MODEL>NAR-4T <HIGH REFRACTIVE INDEX MODEL> for DR-M2/DR-M4

 Test Piece		• Test Piece D For Measurement of Film (nD 1.74)

Parts No. RE-1498

		• Test Piece E For Measurement of Film (nD 1.92)

Parts No. RE-1499

		• Adapter For Film Sample (for DR-A1)

Parts No. RE-1581

589(D)nm
486(F)nm
656(C)nm		• Contact Liquid - monobromonaphthalene nD 1.65 (4mL) Parts No. RE-1196

		• Contact LiquidnD 1.78 (4mL) Parts No. RE-1199

		• Contact Liquid LJ

nD 1.80 (7mL) Parts No. RE-99080

589(D)nm
486(F)nm
656(C)nm• Test Piece A (nD=1.516) with M-Naphthalene• Test Piece C (nD=1.620) with M-Naphthalene
Parts No. RE-1197

 For connecting to a computer (for DR-A1/DR-A1-Plus only) RS-232C Cable For Personal Computer (D-Sub 9 Pin)

Parts No. RE-3523
Parts No. RE-3524
Parts No. RE-3525

Parts No. RE-16501
Parts No. RE-16502
Parts No. RE-16503

546(e)nm
480(F')nm
644(C')nm

Parts No. RE-16504
Parts No. RE-16505
Parts No. RE-16506

Any wavelength Parts No. RE-16507(450 to 539nm, 540 to 680nm, 681 to 799nm, 800 to 1550nm)

Parts No. RE-1195

			 with monobromonaphthalene as contact liquid546(e)nm
480(F')nm
644(C')nm for DR-M2/1550, DR-M4/1550

 Test Piece with monobromonaphthalene as contact liquid			 with monobromonaphthalene as contact liquid

Parts No. RE-3520
Parts No. RE-3521
Parts No. RE-3522

Any wavelength Parts No. RE-3526(450 to 539nm, 540 to 680nm, 681 to 799nm, 800 to 1100nm)

 Contact Liquid		Page 2

Page 4

 For measuring solid samples (excluding the NAR-1T LIQUID)		ABBE REFRACTOMETERS

NAR-3T

Digital thermometer ···························································· 1 pc
AC power cable ·································································· 1 pc
Lamp cable ········································································ 1 pc
LED lamp ········································································· 3 pcs
Test piece ··········································································· 1 pc
Contact liquid [monobromonaphthalene] (4mL) ··················· 1 pc
Special screwdriver calibration ············································ 1 pc
Tube band ······································································ 10 pcs
Instruction manual ······························································ 1 pc

Digital thermometer ···························································· 1 pc
AC power cable ·································································· 1 pc
Lamp cable ········································································ 1 pc
LED lamp ········································································· 3 pcs
Test piece ··········································································· 1 pc
Contact liquid [monobromonaphthalene] (4mL) ··················· 1 pc
Contact liquid[methylene iodide containing sulfur solution] (4mL) ·············· 1 pc
Special screwdriver calibration ············································ 1 pc
Milky white reflector ···························································· 1 pc
Tube band ······································································ 10 pcs
Instruction manual ······························································ 1 pc

Digital thermometer ···························································· 1 pc
AC power cable ·································································· 1 pc
Lamp cable ········································································ 1 pc
LED lamp ········································································· 3 pcs
Special screwdriver for calibration ······································· 1 pc
Tube band ······································································ 10 pcs
Instruction manual ······························································ 1 pc

 Near-infrared Ray Viewer for
MULTI-WAVELENGTH ABBE REFRACTOMETERS

Parts No. RE-15305

 Near-infrared Ray Viewer (With Adapter)

Parts No. RE-9119

Measurement of Birefringent Samples

Special Order Option

Measurement of birefringent (double refraction) materials requires an optional
Polarizing Eyepiece (Part No. RE-1146).
Double refraction measurements are available at wavelengths between 450 and
680nm. Contact us for more details.

The sample stage height
can be customized.

All ATAGO refractometers are designed and manufactured in Japan.
Headquarters: The Front Tower Shiba Koen, 23rd Floor
2-6-3 Shiba-koen, Minato-ku, Tokyo 105-0011, Japan

http://www.atago.net/ overseas@atago.net

TEL : 81-3-3431-1943 FAX : 81-3-3431-1945

TEL : 1-425-637-2107

ATAGO products comply with HACCP,GMP,
and GLP system standards.

customerservice@atago-usa.com

TEL : 91-22-28544915, 40713232 customerservice@atago-india.com
TEL : 66-21948727-9

customerservice@atago-thailand.com

TEL : 55 16 3913-8400

customerservice@atago-brasil.com

TEL : 39 02 36557267

customerservice@atago-italia.com

TEL : 86-20-38108256

info@atago-china.com

TEL : 7-812-777-96-96

info@atago-russia.com

TEL : 234-707-558-1552

atagonigeria@atago.net* Specifications and appearance are subject to change without notice.

ENV.09 16061000PP Printed in Japan

Page 5

Page 6

DR-M2
DR-M4
DR-M2/1550
DR-M4/1550

DIGITAL ABBE REFRACTOMETERS Uses and Applications of the Abbe Refractometers
ATAGO's Abbe Refractometers are widely used in a variety of fields; from basic
research to product management.

DR-A1

Cat.No.1310

Uses and Applications
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-2TFor 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-4TFor 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, andDR-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 theirorientation, 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

for Opaque Samples

Cat.No.1311

With the new prism, the fieldof view is brighter than thepredecessor model(DR-A1), making it easier tomeasure inhomogeneous/opaque samples.

 ATAGO Products Conform to ASTM Standards

Common Specifications (DR-A1/DR-A1-Plus)

Please contact ATAGO for further details.
D542

DR-A1-Plus

Measurement Range

Refractive Index (nD) 1.3000 to 1.7100,
Brix 0.0 to 100.0%(ATC is executed at 5 to 50°C)
Resolution
Refractive Index (nD) 0.0001, Brix 0.1%
Measurement accuracy
Refractive Index (nD) ±0.0002, Brix ±0.1%
Measurement temperature 5 to 50°C

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

Refraction view

Display

DR-A1

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 Coolants
D4095 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

DR-A1-Plus

Stews
Milkhairs,
By simply aligning
the boundary line of refraction at the crossthis refractometerKetchup
directly indicates a measurement value Yogurt(in refractive
index or Brix (%),
selectable) together with the temperature
Curry
Pureeon a
Clear
digital display. Thisrefractometer enables
anyone toeasilyjuicecarry out
samplesSalsa
Grape
measurements without
reading analog graduation. Soy sauce
Vinaigrettes*Dispersion value cannot be measured with the DR-A1.
Opaque samples with
undissolved solids

 Sucrose Solution (for Brix confirmation)

Opaque samples withno undissolved solids

Choosing the Right Model for Your Sample Type

Sucrose solutions for Brix confirmation are now available by ATAGO.
Please choose the most suitable sucrose solution for your application.

DR-A1

Part No.

Part NameBrix Concentration

Contents

RE-110010

10% Sucrose

10.00 ±0.03%

Approx. 5mL

RE-110020

20% Sucrose

20.00 ±0.03%

Approx. 5mL

RE-110030

30% Sucrose

30.00 ±0.03%

Approx. 5mL

RE-110040

40% Sucrose

40.00 ±0.04%

Approx. 5mL

RE-110050

50% Sucrose

50.00 ±0.05%

Approx. 5mL

RE-110060

60% Sucrose

60.00 ±0.05%

Approx. 5mL

P2 object DR-A1-Plus

Stews
KetchupCurry
Salsa
Vinaigrettes

Milk
Yogurt
Puree
Grape juice
Soy sauceClearsamples

Opaque samples with
undissolved solids

Opaque samples withno undissolved solids(Circulating constant temperature bath range, as
well as Brix temperature compensation range.)

Thermometer accuracy
Ambient temperature
Indications
Display
Light source±0.2°C
5 to 40°C
Refractive Index (nD), Brix (%), Temp (°C)
LCD
LED Lamp (Approximating to wavelength of
D-line)Power supply
AC adapter (100 to 240V (50/60Hz) AC input)
PowerP2,
consumption
16VA
P5, P6 object
OutputPrinter DP-63(C) (Optional)
PC (via RS-232C)
Dimensions and weight
13×29×31cm, 6.0kg (Main unit)
10.5×17.5×4cm, 0.7kg (AC adapter)

エマルジョン測定の境界視野比較
For Measuring
Emulsions or Dark Samples
DR-A1

DR-A1-Plus

P2, P5, P6 object* Warranty period for these solutions is 6 weeks.

Custom concentration sucrose solutions are now available.
Accuracy and price will depend on the concentration; please contact ATAGO for more details.

The DR-A1 has a slightly dimmer field

The DR-A1-Plus features a brightermeasure emulsions or dark samples.

measure dark, opaque samples.

of view, which makes it difficult tofield of view, making it easier to
エマルジョン測定の境界視野比較

P2 object*Samples containing undissolved solids
may not produce measurement results.
DR-A1
DR-A1-Plus1

NAR-1T LIQUID

NAR-2T

NAR-4T

Sucrose Solution on Page 1

NAR-3T

2

DR-A1
ABBE REFRACTOMETERS

Cat.No.1211

Cat.No.1212
For Measuring Solid Samples
NAR-1T LIQUIDThe NAR-1T LIQUID is for liquid sample measurement only. This modelhas the Refractive Index scale and Brix scale, and operates with D line
(589nm) light source. Calibration is performed using distilled water.
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.

Specifications
Measurement Range

Refractive Index (nD) 1.3000 to 1.7000,
Brix 0.0 to 95.0%
Minimum scale
Refractive Index (nD) 0.001, Brix 0.5%
Measurement accuracy
Refractive Index (nD) ±0.0002, Brix ±0.1%
Average dispersion value nF-nC (to be calculated according toconversion table)*SOLID only
Measurement temperature 5 to 50°C
(Temperature range regulated by circulating
constant temperature water bath.)
Thermometer accuracy±0.2°C
Ambient temperature
5 to 40°C
Light source
LED Lamp(Approximating to wavelength of D-line)
Power supply
AC100 to 240V, 50/60HzPower consumption
5VA
Dimensions and weight
13×18×23cm, 2.5kg (Main unit)
10×11×7cm, 0.5kg (Thermometer)

NAR-3T

NAR-2T
High Temperature Model

NAR-1T
NAR-1T
LIQUIDLIQUID
NAR-2T

Cat.No.1220

NAR-2T
NAR-2T
NAR-4T

Designed for use with compounds that require measurement at hightemperatures (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.
*Optional accessories: Circulating constant temperature bath (up to 60°C). (Pg. 5)
For a circulating constant temperature bath above 61°C, please purchaseseparately (not available through ATAGO).

Specifications
Measurement Range

Refractive Index (nD) 1.3000 to 1.7000,
Brix 0.0 to 95.0%
Minimum scale
Refractive Index (nD) 0.001, Brix 0.5%
Measurement accuracy
Refractive Index (nD) ±0.0002, Brix ±0.1%
Average dispersion value nF-nC (to be calculated according toconversion table)
Measurement temperature 5 to 120°C(Temperature range regulated by circulating
constant temperature water bath.)
Thermometer accuracy
0 to 100°C … ±0.2°C,
100 to 120°C … ±0.5°C
Ambient temperature
5 to 40°C
Light source
LED Lamp(Approximating to wavelength of D-line)
Power supply
AC100 to 240V, 50/60HzPower consumption
5VA
Dimensions and weight
12×20×25cm, 5.8kg (Main unit)
10×11×7cm, 0.5kg (Thermometer)

 Custom Refractive Index Ranges Available by Special Order

3

DR-A1

DR-A1-Plus
DR-A1-Plus

PRECISION ABBE REFRACTOMETER

NAR-1T LIQUID
NAR-1T SOLID
For Measuring Liquid Samples Only

DR-A1
DR-A1
DR-A1-Plus

Precision Model

NAR-4T
NAR-4T
NAR-3T

ABBE REFRACTOMETERS

NAR-4T
Cat.No.1230

NAR-3T
NAR-1T
NAR-3T LIQUID

Cat.No.1240

High Refractive Index Model

NAR-2T

NAR-4T

The NAR-3T is the unit with the highest degree of precision andaccuracy among the Abbe Refractometers. It was developed togive improved measurement accuracy and ease of use. This wasachieved by making fundamental improvements to the optical system
and utilizing a larger scale, which allows for a refractive index scalemeasurements 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.

Specifications

Specifications

Measurement Range

Refractive Index (nD) 1.30000 to 1.71000,
Brix 0.00 to 95.00%
Minimum scale
Refractive Index (nD) 0.0002, Brix 0.1%
Measurement accuracy
Refractive Index (nD) ±0.0001, Brix ±0.05%
Average dispersion value nF-nC (to be calculated according toconversion table)
Measurement temperature 5 to 50°C
(Temperature range regulated by circulating
constant temperature water bath.)
Thermometer accuracy±0.2°C
Ambient temperature
5 to 40°C
Light source
LED Lamp(Approximating to wavelength of D-line)
Power supply
AC100 to 240V, 50/60HzPower consumption
5VA
Dimensions and weight
12×31×34cm, 9.0kg (Main unit)
10×11×7cm, 0.5kg (Thermometer)

NA*Dispersion values cannot be measured with this unit.

Measurement Range
Minimum scale
Measurement accuracy
Measurement temperature

Thermometer accuracy
Ambient temperatureLight source
Power supply
Power consumption
Dimensions and weight

Refractive Index (nD) 1.4700 to 1.8700
Refractive Index (nD) 0.001
Refractive Index (nD) ±0.0002
5 to 50°C(Temperature range regulated by circulating
constant temperature water bath.)±0.2°C
5 to 40°C
LED Lamp(Approximating to wavelength of D-line)
AC100 to 240V, 50/60Hz
5VA
13×18×23cm, 2.5kg (Main unit)
10×11×7cm, 0.5kg (Thermometer)

Note: To obtain the refractive index value, simply refer to the conversion table that is provided with this unit. Dispersion values cannot be measured with this unit.

 NAR-1T • LO Cat.No.1217 Measurement Range: Refractive Index (nD) 1.1500 to 1.4800, Measurement temperature: 5 to 50°C

 NAR-2T • HI

 NAR-2T • LO Cat.No.1227 Measurement Range: Refractive Index (nD) 1.1500 to 1.4800, Measurement temperature: 5 to 120°C

 NAR-2T • UH Cat.No.1229 Measurement Range :Refractive Index (nD) 1.7000 to 2.0800, Measurement temperature: 5 to 120°C

Sucrose Solution on Page 1

DR-A1

Cat.No.1228 Measurement Range: Refractive Index (nD) 1.4700 to 1.8700, Measurement temperature: 5 to 120°C

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MULTI-WAVELENGTH ABBE REFRACTOMETERS

DR-M2
DR-M4

Cat.No.1410

High Refractive Index Model

Cat.No.1414

Refraction view

MULTI-WAVELENGTH ABBE REFRACTOMETERS
Customizable
wavelength:
1100nm range
supported

Refraction view

matching the boundary line at the intersection point of the cross hairs.
These refractometers can be connected to the digital printer. The
DR-M4 is a high refractive index version of the DR-M2, with a refractive
index measurement range of 1.4700 to 1.8700 (at a wavelength of
589nm). The DR-M4 shares common appearance and features with
the DR-M2.

Specifications

Customizable
wavelength:
1550nm range
supported

Cat.No.1412

Cat.No.1415

High Refractive Index Model

Display

Refractive Index or Abbe number (νd or νe) can be measured at
different wavelengths ranging from 450 to 1,100nm.
For measurement at wavelengths ranging from 681 to 1,100nm, theoptional near infrared ray viewer (Part No.RE-9119) is required. The
DR-M2/DR-M4 digitally displays the measurement results of refractive
index or Abbe number on the LCD. Measurement can be achieved by

DR-M2/1550
DR-M4/1550

Display

Refractive Index or Abbe number (νd or νe) can be measured at different wavelengths
ranging from 450 to 1,550nm. Measurement at wavelengths of 1550nm has become
more in demand with the recent development of materials for the IT communications
field. The DR-M2/1550 and the DR-M4/1550 are suitable for measuring samples that
require a refractive index in the near infrared range, such as fiber optics materials, opticalglass, and plastics.
These models are equipped with a power supply unit and a monochromatic lightsource. They can be used with a near infrared ray viewer or interference filters. These
refractometers digitally display the measurement result on the LCD. Measurement canbe achieved by matching the boundary line at the intersection point of the cross hairs.
These units can be connected to the digital printer.
The DR-M4/1550 is a high refractive index version of the DR-M2/1550, with a refractive
index measurement range of 1.4700 to 1.8700 (at a wavelength of 589nm). The
DR-M4/1550 shares common appearance and features with the DR-M2/1550.

Specifications

Measurement Range
DR-M2
Wavelength 450nm : Refractive Index 1.3278 to 1.7379
Wavelength 589nm : Refractive Index 1.3000 to 1.7100
Wavelength 680nm : Refractive Index 1.2912 to 1.7011
Wavelength 1,100nm : Refractive Index 1.2743 to 1.6840
DR-M4
Wavelength 450nm : Refractive Index 1.5219 to 1.9220
Wavelength 589nm : Refractive Index 1.4700 to 1.8700
Wavelength 680nm : Refractive Index 1.4545 to 1.8544
Wavelength 1,100nm : Refractive Index 1.4260 to 1.8259

Resolution
Measurement accuracy
Wavelength range

Refractive Index (nD) 0.0001, Abbe number 0.1
Refractive Index (nD) ±0.0002(With the attached test piece at 500 to 650nm)
From 450 to 1,100nm*Interference filters for measurement at wavelengths
other than 589nm are sold separately(For measurement at wavelengths ranging from 681
to 1,100nm, the near infrared ray viewer (optional) is
required.)

Measurement
temperature range
Thermometer accuracy
Ambient temperaturePower consumption
OutputPower supply
Dimensions and weight

5 to 50°C(Temperature range regulated by circulating
constant temperature water bath.)±0.2°C
5 to 40°C
160VA
For digital printer, DP-63(B) (optional),
Conforming to Centronics standard
AC100 to 240V, 50/60Hz
13×29×31cm, 6.0kg (Main unit)
15×33×11cm, 3.2kg (Power supply unit)

Measurement Range
DR-M2/1550
Wavelength 450nm : Refractive Index 1.3278 to 1.7379
Wavelength 589nm : Refractive Index 1.3000 to 1.7100
Wavelength 680nm : Refractive Index 1.2912 to 1.7011
Wavelength 1,100nm : Refractive Index 1.2743 to 1.6840
Wavelength 1,550nm : Refractive Index 1.2662 to 1.6759
DR-M4/1550
Wavelength 450nm : Refractive Index 1.5167 to 1.9166
Wavelength 589nm : Refractive Index 1.4700 to 1.8700
Wavelength 680nm : Refractive Index 1.4559 to 1.8557
Wavelength 1,100nm : Refractive Index 1.4298 to 1.8296
Wavelength 1,550nm : Refractive Index 1.4211 to 1.8209

Resolution
Measurement accuracy
Wavelength range

Refractive Index (nD) 0.0001, Abbe number 0.1
Refractive Index (nD) ±0.0002(with the attached test piece at 500 to 650nm)
From 450 to 1,550nm*Interference filters for measurement at wavelengths
other than 589nm are sold separately

Measurement
temperature range
Thermometer accuracy
Ambient temperaturePower consumption
OutputPower supply
Dimensions and weight

5 to 50°C(Temperature range regulated by circulating
constant temperature water bath.)±0.2°C
5 to 40°C
160VA (Refractometer),
240VA (Monochromatic Light source)
For digital printer, DP-63(B) (optional),
Conforming to Centronics standard
AC100 to 240V, 50/60Hz
13×29×31cm, 6.0kg (Main unit)
15×33×11cm, 3.2kg (Power supply unit)
22×30×20 to 30cm, 5.2kg (Light source)

Optional Accessories
Circulating Constant Temperature Bath60-C5

Cat.No.1923

A circulating water bath for precise temperature
control of refractometers without Peltier. The
temperature range can be set from 10 to 60°C andits compact, easy to use design makes it optimal forconnecting to a refractometer.

Specifications
Tank capacity
Temperature setting range
Minimum temperature indication
Constant-temperature accuracy
Power consumption
Power supply
Dimensions and weight

Abbe number can be measured simply!
1.0 L
10 to 60°C (water)
0.1°C±0.2°C
250VA
AC 100 to 240V , 50/60Hz
20.4×33.6×28.9cm, 9.0kg(main unit only)

Digital PrinterDP-63(C)Specifications

Cat.No.3136

for DR-A1 · DR-A1-Plus

DP-63(B)Cat.No.3135

for DR-M2 · DR-M4 · DR-M2/1550 · DR-M4/1550

5

Sucrose Solution on Page 1

Printing method
Power consumption
Power supply
Dimensions and weight

Thermal dot
13VA
AC adapter(Input voltage: AC100 to 240V)
17×16×7cm 580g (main unit only)(In the case of measurement of Abbe number "νd")(1) Set the sample on the prism surface.
(2) Insert the 589nm interference filter(attached to the DR-M2 as a standard
accessory).
While looking through the eyepiece, matchthe boundary line with the intersection
point of the cross hairs. Then, press the
SET key.

Display(3) Replace the interference filter with the 486nm
interference filter (an optional part). While looking
through the eyepiece, match the boundary linewith the intersection point of the cross hairs. Then,press the SET key.
(4) Replace the interference filter with the 656nm
interference filter (of an optional part). While looking
through the eyepiece, match the boundary line with
the intersection point of the cross hairs.
(5) Press the SET key. The indication on the display atthat time represents the Abbe number "νd".

Refraction view

* For optimum convenience, use an optional digital printer to print out
the refractive index at each wavelength and Abbe number.

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