Multi-Wavelength Abbe Refractometer DR-M2

Refractive index or Abbe number (νd or νe) can be measured at different wavelengths ranging from 450 to 1,100nm. The DR-M2 digitally displays measurement result of refractive index or Abbe number on the LCD. Measurement can be achieved by matching the boundary line with the intersection point of the cross hairs. This refractometer is connectable with Digital printer DP-AD(B) (Optional).


  • LCD digital display
  • Measument achieved by matching boundary line with intersection point of cross hairs
  • Can be calibrated with water
  • Can be connected to printer and circulating






Refractive index

Abbe number


Refractive index 1.3278 to 1.7379 (Wavelength 450nm)

Refractive index 1.3000 to 1.7100 (Wavelength 589nm)

Refractive index 1.2912 to 1.7011 (Wavelength 680nm)

Refractive index 1.2743 to 1.6840 (Wavelength 1,100nm)

Minimum Indication

Refractive index : 0.0001

Abbe number : 0.1


Refractive index : ±0.0002

(With test piece at 500 to 650nm)

Measurement Temp.

5 to 50゚C

(With circulating constant water bath)

Display Panel


Light source

Halogen lamp


For printer, DP-AD (B) (Optional)

Wavelength Range

From 450 to 1100nm (with interference filters)

(For measurement at wavelengths ranging from 681 to 1100nm, the Near Infrared Ray Viewer (Optional is required)

Dimensions & Weight

13×29×31cm, 6.0kg (Refractometer)

15×33×11cm, 3.2kg (Light source unit)

Special Order Option : The sample stage height can be customized.

The ATAGO™ Multi-Wavelength Abbe Refractometer, Model DR-M2/1550 measures refractive index or Abbe number (vd or ve) at different wavelengths ranging from 450 to 1550nm.

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