Rudolph Research Analytical - J57 Automatic Refractometer

The J57 Automatic Refractometer was designed to meet the unique needs of industrial environments where the refractometer is operated on the factory floor. A single flat measurement surface, electronic temperature control and one button measurement capability make it perfect for high wear and tear, and heavy use applications.

Automatic Measuring System

The Rudolph J57 features a fully automatic measuring system. The operator simply places the sample on the prism, presses a button and the result is displayed on 7.5cm x 10cm back lit LCD. There are no shadow lines to match and there is no eyepiece requiring operator determination or manual adjustment.

Electronic Temperature Control

Refractive Index (BRIX) readings are very sensitive to temperature. Most refractometers have the ability to correct for temperature, but this correction only works accurately with limited types of samples. Users looking for real accuracy had to spend the extra money for a circulating bath and then clean and maintain it. The J57's built in electronic temperature control provides the best of both worlds, the absolute accuracy of a temperature controlled instrument with the convenience of not requiring a water bath.

Easy to Clean Measurement Surface

Unlike traditional Abbe refractometers, the J57 Automatic Refractometer has only 1 measurement surface; there is no second prism to close on top of the sample. The measurement surface is very flat with no corners, crevices or deep sample wells making the J57 exceptionally easy to clean.

High Durability Sapphire Prism

When Abbe style refractometers are used in a high throughput application, prism replacement becomes a regular task. The reason for replacement is that Abbe refractometers have glass prisms (hardness approximately 6 on the Moh's scale) compared to the J57's artificial sapphire prism (hardness 9 on the Moh's scale). By making the prism from artificial sapphire the need to replace the prism is avoided and total cost of ownership is lowered.

Touchscreen and LCD

All functions of the J57 Automatic Refractometer are activated through a large touch screen LCD. The 70mm X 75mm measure button on the J57 is designed to allow an operator wearing gloves to activate measurement with an elbow or side of a hand. The sealed touch screen is resistant to fingernails, sharp objects, chemicals and acids.

Password Protection

A combination of password protection and being able to lock out specific "keys" enables control over which users can access certain functions. This means that the J57 can be set up as a one-button instrument for factory environments.

Printer & Computer Output

In today's highly regulated environment many users find hard copy or computer record keeping essential. The J57 comes complete with a standard centronics port for a printer and an RS232 port for direct computer connection.>

Calibration

The J57 Automatic Refractometer offers 1 or 2 point calibration. The instrument stores the date and the time of the last calibration in line with ISO and similar standards. Regardless of how many times the refractometer is calibrated it can always be restored to the default factory calibration.