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ATAGO’s series of Abbe refractometers are named after Ernst Abbe, who invented the first refractometer in the 19th Century. ATAGO’s first refractometers were Abbe types, desk-top units with an eyepiece like a microscope. The NAR series continues this esteemed tradition, albeit with improved accuracy and reliability. The units in the series – the NAR-1T, NAR-2T, NAR-3T, and NAR-4T – distinguish themselves among ATAGO’s family of refractometers by their durability and their ability to measure the refractive index of solid samples.

  • Available in numerous measurement ranges to suit the needs of any application
  • Combination Brix and refractive index scales
  • Capable of measuring solid samples
  • Capable of measuring Abbe numbers
Model NAR-4T Cat.No. 1240
Measurement range Refractive index (nD)
1.4700 to 1.8700
Minimum scale Refractive index (nD) 0.001
Measurement accuracy Refractive index (nD)
Digital Thermometer Indication range 0.0 to 50.0°C
( Accuracy ± 0.2°C
Minimum indication 0.1°C )
Measurement Temperature Range 5 to 50°C Light Source LED
Power Supply AC100 to 240V , 50/60Hz Power Consumption 5VA
Dimensions & Weight 13×18×23cm, 2.5kg (Refractometer)
10×11×7cm, 0.5kg (Thermometer)
Optional • Test piece A with m-naphthalene : RE-1195
• Test piece D for measurement of film : RE-1498
• Test piece E for measurement of film : RE-1499
• Monobromona-phthalene as contact liquid : RE-1196 
• Methylene iodide containing sulfur solution : RE-1199 
• Contact liquid LJ : RE- 99080
• Eyepiece for polarizing : RE-1146 
* Calibration Certificate : Contact an ATAGO representative for details.
Parts • Test piece C with m-naphthalene : RE-1197
* As for the other consumables & the part please view this.


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