Refractometer with Multi-Wavelength capacity

Multi-Wavelength Abbe Refractometer

  • It can be measured at different wavelengths ranging from 450 to 1,550nm.

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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, the optional near-infrared ray viewer (Part No.RE-9119) is required. The DR-M2/DR-M4 digitally displays the measurement results of the refractive index or Abbe number on the LCD. Measurement can be achieved by 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). 

ScaleRefractive index
Abbe number
Measurement RangeRefractive 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)
Refractive index : 1.5219 to 1.9220 (at 450nm)
Refractive index : 1.4700 to 1.8700 (at 589nm)
Refractive index : 1.4545 to 1.8544 (at 680nm)
Refractive index : 1.4260 to 1.8259 (at 1,100nm)
Minimum IndicationRefractive index : 0.0001
Abbe number : 0.1
Measurement AccuracyRefractive index : ±0.0002
(With the attached test piece at 500 to 650nm)
Ambient Temperature5 to 40゚C
Measurement Temperature Range5 to 50゚C
(With circulating constant water bath)
Display PanelLCD
Light sourceHalogen lamp
OutputFor printer DP-63 (B) Optional
Wavelength RangeFrom 450 to 1100nm (with interference filters) 
(For measurement at wavelengths ranging from 681 to 1100nm, the Near Infrared Ray Viewer (Optional is required)
Power SupplyAC100 to 240V, 50/60Hz
Dimensions & Weight13×29×31cm, 6.0kg (Refractometer)
15×33×11cm, 3.2kg (Light source unit)
Power consumption160VA