Digital refractometer J257

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A highly versatile Refractometer, the Rudolph Research J257 was developed by working together with laboratory refractometer users from the polymer, petroleum, petrochemical, pharmaceutical and essential oil industries. The J257 is a fully Automatic, Digital Refractometer, featuring electronic cooling and heating. In addition it has an extended Refractive Index (RI) measurement range. The J257 is part of the Rudolph Research Rudolph Research Refractometer Product Line. Versatile Refractometer for a Wide Range of Applications Rudolph Research’s J257 is designed as a multipurpose versatile refractometer for a broad range of (RI) refractive index measurement applications. Many laboratories need the versatility of a wide range refractometer as they measure many varied samples. The J257 measures the widest possible range of Refractive Index from 1.26 to 1.72 RI. This means that this instrument can measure many materials that a refractometer with only a food refractive index range of 1.33-1.53 cannot. Automatic Refractometer Operation Operating the Rudolph J257 is as simple as placing a sample on the prism, closing the cover and reading the results on the digital screen — all in just a few seconds. Being fully automatic there there are no shadow lines to match and there is no eyepiece requiring any kind of operator determination or manual adjustment. When the “measure when stable” mode is selected, the J257 automatically waits until the sample has been heated or cooled to a predefined temperature before initiating a measurement.