Designed as a research quality instrument the Rudolph J357 Automatic Digital Refractometer offers one of the highest measurement ranges of any instrument in the Rudolph refractometer product line. This instrument offers the same extra wide RI measurement range as our chemical industry refractometer models combined with the high accuracy of our food industry refractometer models. It also offers very powerful automatic electronic temperature control (heating and cooling) and is able to make RI and BRIX measurements at up to 120 °C. The J357 is a perfect choice for the most demanding pharmaceutical, chemical, petroleum, essential oils, fragrance and cosmetic refractometer users.
For additional information see the Rudolph Research Refractometer product line.
Measurement Scales:Refractive Index(RI)BRIX(%sucrose)and100 User Programmable Scales
Measurement Range: 1.26-1.70RI 0-100BRIX
Reproducibility: ±0.00002RI ±0.015BRIX
Accuracy: ±0.00004RI ±0.03BRIX
Optical Wavelength:589.3nm(other wavelengths available)
Response Time: User configurable-generally less than 30 seconds
Communication Interface: Two RS232 ports one parallel printerport
Temp.Control Range: 15°C-100°C(10–120°C Optional)
Ambient Temp.Limit: 10°C-40°C
Temp.Correction Range: 18°C-95°C(for pure sucrose solutions)
Calibration: Using water or NIST traceable standards
Operating Dimensions/Weight: L:151/2”W:10” H:41/2”/23 lbs. L:39.5cmW:25.5cmH:11.5cm/10.4kg
PowerRequirements: 100-240volts 50Hz-60Hz