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The Atago 3850 PAL-RI is a handheld, portable, water-resistant refractometer with a high refractive index measurement scale in the 1.3306 to 1.5284nD range, an LED display with external light interference (ELI) technology, and an acrylonitrile butadiene styrene (ABS) resin Ingress-Protection (IP-65)-rated body. Handheld refractometers, also known as sugar meters, concentration meters, or Brix meters, are commonly used in the culinary, food and beverage, pharmaceutical, educational, geological, chemical, and ecological industries, and for water-testing applications. This refractometer is housed in an ABS resin body for use with many sample types and an ambient temperature range of 10 to 40 degrees C. The 3850 PAL-RI is factory-calibrated (calibration certificate not included) and can be calibrated with tap water. The metal sides of the sample well allow the sample temperature to conform quickly and evenly to the prism temperature for accurate measurements. The sloped shape eases sample pouring and helps avoid spills while taking measurements. The outer shell is shaped for easy gripping, with raised grip dots on the back side where the fingertips rest. The LED-illuminated digital display with ELI technology helps provide accurate measurement near windows or outdoors. ELI alerts the user that there is too much light, such as direct sunlight, penetrating through the prism. The unit displays both refractive index and temperature within three seconds, with the refractive index continuously scrolling across the display. The 3850 PAL-RI comes with a protective plastic storage case with a foam cut-out insert to cushion the instrument. Specifications Measurement scale range Refractive index 1.3306 to 1.5284 Specimen measurement temperature range 5 to 45 degrees C