or
Digital Abbe Refractometer DR-M2/1550 nD 1.30000-1.7100 at 589nm Multiple Wavelength 450 589 680 1100 1550nm Min.Scale: nD 0.0001 Measurement Accuracy: nD+/-0.0002 Wavelength Range: 450-1550nm Temp.Range: 5-50C
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Digital Abbe Refractometer DR-M2 nD 1.30000-1.7100 at 589nm Multiple Wavelength 450 589 680 1100 nm Min.Scale: nD 0.0001 Measurement Accuracy: nD+/-0.0002 Wavelength Range: 450-1100nm Measurement Temp.: Range 5-50 C
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Digital Abbe Refractometer DR-M4 nD 1.30000 - 1.7100 at 589nm Multiple Wavelength 450 589 680 1100 nm Min. Scale: nD 0.0001 Measurement Accuracy: nD +/-0.0002 Wavelength Range: 450-1100nm Measurement Temp.Range: 5-50 C
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