Unmatched Capabilities in a Fully Portable Refractometer
Rudolph brings decades of leadership with High Accuracy, Bench top Refractometers to Handheld Instrumentation

With the experience and innovation gained from over 2 decades of leadership in Refractometer design and manufacturing, Rudolph introduces the new benchmark for Handheld Refractometers. The J27 Refractometer is entirely untethered yet refuses to accept the compromises in performance and accuracy of typical Handheld instruments. Now measure everything anywhere still with laboratory level accuracy

Temperature Controlled Measurements at 20 and 25°C
The weakness of most handheld Refractometers is they do not control temperature. Refractometer measurements are often highly sensitive to drifting results because mathematically correcting for temperature alone does not work well when the ambient temperature is changing. Only precise temperature control will result in the measurement accuracy many users require.

The Rudolph J27 Peltier Temperature Control at the prism surface allows for improved accuracy and greater stability. Precise heating and cooling ensures stable and accurate measurements at either 20 or 25°C. Select the J27 series with temperature control for precise measurements when working with samples that are very hot, very cold or are not Sucrose, Glucose or sugar based.

For example, a glycol sample must be measured with precise temperature control for an accurate measurement – temperature correction for sugar cannot be applied to non-sucrose based samples. A sample coming from a hot kettle on a production line must also be temperature controlled as temperature correction will not be accurate for a sample far from room temperature.