Hand Held Refractometer MASTER-RI

The Atago 2612 Master-RI is a handheld, portable refractometer that has a refractive index scale that measures in the 1.435 to 1.520nD range, manual temperature compensation, and has a metal body. A refractometer measures the refractive index of a solution in a sample, converts it to units of percent by weight, and displays the results. Handheld refractometers are commonly used in the culinary, food and beverage, pharmaceutical, educational, geological, chemical, and ecological industries, and for water-testing applications.


  • Handheld, portable refractometer for refractive index measurement of vegetable oil, petroleum, and oil sticks
  • 1.435 to 1.520nD refractive index scale for a high-contrast field of view
  • Manual temperature compensation
  • Ambient light illuminates the scale; no additional power source is required
  • Telescope-shaped, streamlined design (16.8 x 3.2 x 3.4cm) with die-cast aluminum metal body for heat- and organic solvent-resistance

This refractometer is housed in a durable, die-cast aluminum metal body for heat and organic solvent resistance. The 2612 Master-RI features ambient light to illuminate the scale; no additional power source is required. Calibration requires a calibration solution (not included). Calibration can be controlled and adjusted with an exposed calibration screw and an included specialized screwdriver, although other items can be used to unscrew the unit. However, the unit retains its water-resistance. The outer shell grip is smooth and easy to clean, which reduces the possibility of food and sample entrapment, avoiding contamination and bacterial growth. The analog scale features a bright, high-contrast display for clear visibility of the boundary and memory lines intersection. Samples are viewed through a monocular, focusable, cushioned eyepiece. The unit includes a protective plastic storage case with a foam cut-out insert to cushion the instrument.



MASTER-RI is refractive-index model ( measurement range : RI 1.435 to 1.520 ) of the MASTER-Series.






Refractive index : 1.435 to 1.520

Minimum Scale

Refractive index : 0.001


MASTER-RI is refractive-index model. It can be used for measuring the refractive index of vegetable oil, petroleum, oil slicks, etc.


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