Refractometers

Rudolph Research Analytical manufactures high precision refractometers for research laboratory and QC applications. Our J Series refractometer product line includes standard and wide range units, including the J57, J157, J257 and J357 refractometers. Electronic temperature control is standard on all of our refractometers, eliminating the need for waterbaths—resulting in cost savings and avoidance of possible contamination. Learn how Rudolph Research Analytical J Series refractometers differ from the traditional Abbe refractometer, by eliminating the need for prism replacement. Our high performance J357 automatic refractometer offers advanced features associated with the world's best refractometers, such as a secure data storage card, custom programming of concentration scales, highly durable touch screen controls, keyboard lockout security feature, and interfacing with polarimeters. Rudolph Research Analytical is well known among refractometer manufacturers for superior quality, service and technical support. Our refractometer instruments and analytical instruments are relied upon by customers worldwide for applications requiring high accuracy and temperature dependent data.

 
J357 Automatic Refractometer
  • Refractive Index Range: 1.29-1.70
  • Brix Range: 0-95
  • Resolution: 0.00001 RI
  • Electronic Heating and Cooling
    15°C -100°C
  • Instrument Level 21 CFR Part 11 Compliance
  • Local Secure Data Storage
  • Designed as a wide range refractometer to meet the needs of Petroleum based industries and highly regulated Pharmaceutical laboratories. Chosen for wide range, accuracy, reliability and durability by customers worldwide from among the world's best refractometers.

J357 Automatic Refractometer

Rudolph Research Analytical Refractometer J257
  • Refractive Index Range: 1.32-1.70
  • Brix Range: 0-95
  • Resolution: 0.0001 RI
  • Electronic Heating and Cooling
    10°C - 40°C
    10°C - 70°C (optional)
  • Designed as a wide range refractometer to meet the needs of the Pharmaceutical, Chemical, Essential Oil, Flavors, Fragrance and Petroleum based industries.

J257 Automatic Refractometer

Rudolph Research Analytical Refractometer J157
  • Refractive Index Range: 1.33-1.53
  • Brix Range: 0-95
  • Resolution: 0.00001 RI, 0.01 BRIX
  • Electronic Heating and Cooling:
    10°C - 40°C
    10°C - 70°C (optional)
  • Designed as a standard range refractometer for primary use in testing food and water based products.

J157 Automatic Refractometer

Rudolph Research Analytical Refractometer J57
  • Refractive Index Range: 1.33-1.53
  • Brix Range: 0-95
  • Resolution: 0.00001 RI, 0.01 BRIX
  • Electronic Heating and Cooling:
    20°C or 25°C (Customer specified)
  • Designed as a standard range refractometer for primary use in industrial environments where the refractometer is operated on the factory floor. As with all Rudolph refractometers, the artificial sapphire prism provides lower total cost of ownership by eliminating the need for prism replacement associated with the traditional Abbe refractometer when used in high throughput applications.

J57 Automatic Refractometer

J157-633 Automatic Refractometer

Application Specific

  • Designed specifically for measuring materials to be used in the Optical Waveguide Lightmode Spectroscopy (OWLS) system; the J157-633 has all of the same features as the standard J157 automatic refractometer but operates at 633nm instead of the standard 589nm.
  • For more details on the OWLS system please see www.owls-sensors.com
  • For more information about our analytical instruments or help with feature comparisons for products offered by other refractometer manufacturers, contact Peter Marriott at Rudolph Research Analytical.

J157-633 Refractometer