Refractometer Temperature Correction & Control with a Rudolph J457 Rudolph Research Analytical details the difference between Temperature Control & Temperature Correction using distilled water, cranberry juice, ethylene glycol & engine oil on their newest automatic refractometer, the J457. The accuracy of Temperature Correction Vs Temperature control on samples that deviate from pure water and sucrose […]
How to Clean a Rudolph Research Density Meter: DDM2911
Technical video for the Rudolph DDM 2911 Density Meter. This video details the procedure required to clean the Density Meter prior to or after making a liquid density measurement. The video covers using a syringe to inject cleaning solvent, drying agent, capturing waste, and drying the instrument’s U-Tube with the on-board air pump. Using VideoView […]
Refractometer Calibration, How to Perform a Single & 2 Point Calibration
Refractometer Calibration, How to Perform a Single & 2 Point Calibration This video demonstrates how to perform a Single & Two Point Calibration on a Rudolph J157 Refractometer. The J157 is designed as a high accuracy refractometer for food and water based chemical applications. The instrument can read to ±0.00004 RI / ±0.03 BRIX making […]
Wide Range Refractometer – Rudolph J357
J357 Wide Range Refractometer Refractometer, Rudolph Research’s J357, part of the Rudolph Refractometer Product Line, Designed as a research quality instrument the Rudolph J357 Digital, Bench-top Refractometer has the highest performance of any refractometer in the Rudolph range. This instrument offers the same extra wide RI measurement range as our chemical industry refractometer models combined […]
Refractometers, Measuring Volatile Samples
Refractometer Measurements with Volatile Samples – Video This video demonstrates Rudolph’s Automated Volatile Sample Measurement system using Distilled Water & Glycerin. The measurements were accurately recorded over a 24 hour period reflecting constant measurements & thus reproducibility was proved. Measurement Results: Distilled Water RI : 1.3330 Glycerin RI : 1.4741 For more information about Rudolph […]
