Rudolph J457, Electronic Refractometer

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The J457 Electronic, Laboratory Refractometer is the most capable instrument in the Rudolph Research Refractometer Product Line. 3 models/configurations are available. All come with Rudolph’s exclusive Smart Measure™ Technology that virtually insures accurate Refractive Index (RI) and BRIX, measurements by automatically detecting sample problems. The J457 can determine 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.

  • Most advanced model for very demanding pharmaceutical, analytical, and chemical labs.
  • Smart Measure™ Improves Results with Live Measurement and Sample Load Well Monitoring.
  • Dual Electronic Temperature Control – Range 10ºC – 110ºC or 10ºC – 120ºC (optional)
  • Accuracy: Refractive Index ±0.00002, BRIX ±0.01
  • Fully 21 CFR Part 11 Compliance and On-Board Data Storage
  • Widest Measurement Range: Refractive Index 1.26 – 1.72, BRIX 0 – 100
  • Data Storage – 8GB non-removable Compact Flash – Or Fully Networkable



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