Rudolph Analytical J457 Automatic Refractometer


Rudolph’s J457 with Smart Measure™ Technology Improves Results!

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Rudolph’s J457 with Smart Measure™ Technology Improves Results!
The most capable instrument in the Rudolph Research line of Laboratory Refractometers includes all 3 models of the J457 Electronic, Digital, Refractometers. All come with Rudolph’s exclusive Smart Measure™ Technology that virtually insures accurate Refractive Index (RI) and BRIX, measurements by automatically detecting when the prism is improperly cleaned, insufficient sample is loaded, or if the instrument is improperly calibrated. Various configurations are available for a small footprint, wall mount, or a remote-read factory configuration. All models come with a digital touch screen, and our Dual Temperature Control System utilizing Peltier Technology.

For additional information see the Rudolph Research Refractometer product line.

Refractometer Specifications J457 (All models)
Measurement scales: Refractive Index (nD) Brix (% Sucrose) and up to 100 custom programmed scales
Measurement range: Refractive Index 1.26 – 1.72 Brix 0 – 100
Accuracy: Refractive Index ±0.00002 Brix 0.01
Reproducibility: Refractive Index ±0.00002 Brix 0.01
Resolution: Refractive Index 0.00002 Brix 0.01
Temperature control range: 10°C to 110°C (wider temperature range available dependent on ambient conditions and options)
Temperature control by dual Peltier system; boost option to 120°C available
Temperature control reproducibility: ±0.01°C
Ambient temperature limit: 5°C to 40°C
Temperature correction range: 4°C to 95°C (for sucrose solutions)
Sample temperature limit: -20°C to 250°C
Optical wavelength: 589.3nm (NaD line)
Response time: User configurable generally less than 30 seconds
Calibration: Using water or NIST traceable fluids
Factory default calibration can always be reset
Prism: Artificial sapphire
Acid resistance: Hastelloy™ measurement surface (optional)
Data storage/internal memory: 8 GB Non-removable Compact Flash
Display: Adjustable 10.4 inch diagonal
800-600 pixels color Flat Panel Monitor with Resistant Touch Screen Interface 400 nits brightness gasketted for spill protection
User interface: Touchscreen Communication interface: 3 USB RS232 and Cat5 Network (Ethernet)
Operating dimensions/weight: L: 17 1/4” W: 12” H: 13” / 23 lbs. L: 43.5cm W: 30.5cm H: 33cm / 10.4 kg
Power requirements: 100 – 240 volts
50 Hz – 60 Hz
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