Refractometer – Rudolph’s Digital J57-VT HA – High Accuracy & J57-VT WR Wide Range. The J57-VT High Accuracy Refractometer and J57-VT Wide Range Refractometer are part of the Rudolph Research Product Line. The Rudolph J57-VT High Accuracy and J57 Wide Range refractometers are designed to meet the unique needs of food quality testing where the […]

Digital Refractometer – J157 PLUS available in several models and option configurations. The Rudolph J157 Digital Refractometer offers high performance and a range of features to suit many demanding applications in laboratories and harsh industrial environments. Rudolph Research Analytical, working together with refractometer (Refraktometer) users from various countries and disciplines, has developed the J157 series […]

Versatile Refractometer – J257 with Extended Measurement Range 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) […]

Automatic Refractometer, J357 Offers Highest Performance for Research Labs. The Rudolph J357 Automatic Refractometer, designed as a research quality instrument offers one of the highest measurement ranges of any instrument in the Rudolph refractometer product line. This instrument offers the same extra wide refractive index measurement range as our chemical industry refractometer models combined with the […]