Overview
The J57WR Series of Automatic Refractometers by Rudolph Research Analytical is designed for high throughput chemical applications, emphasizing integrity, quality, and innovation. It is tailored for industrial environments where refractometers are used as QC tools.

Automatic Measuring System
The J57WR features a fully automatic measuring system with a simple operation: place the sample on the prism, press a button, and view results on a backlit LCD. This eliminates the need for manual adjustments or operator interpretation.

Electronic Temperature Control
Temperature significantly affects refractive index readings. The J57WR includes built-in electronic temperature control, offering precise accuracy without the need for a water bath, suitable for various chemical samples.

Wide Measuring Range
Designed specifically for chemical measurements, the J57WR offers a wide range from 1.26 to 1.70, accommodating materials like fluorocarbons and aromatic chemicals.

Easy to Clean Measurement Surface
The instrument features a flat, easy-to-clean surface, minimizing sample residue and ensuring consistent performance.

High Durability Sapphire Prism
The sapphire prism is more durable than traditional glass prisms, reducing the need for frequent replacements in high throughput applications.

Lowest Whole of Life Cost
With changes in electronics and optics pricing, the J57WR offers a lower lifetime cost compared to traditional Abbe refractometers.

Calibration
The J57WR supports digital 1 or 2 point user calibration, storing data in compliance with ISO standards. Calibration is password protected for security.

User Configurable
The instrument's display and keypad are customizable, allowing configuration to specific application needs. Functions can be password protected to prevent unauthorized changes.

Options and Accessories
Available options include NIST traceable calibration liquids, data capture software, IQ/OQ/PQ package, small volume sample well, acid-resistant components, different measurement wavelengths, printer, and barcode reader.

Specifications
- Measurement Scales: Refractive Index (RI), Brix (% sucrose)
- Measurement Range: 1.26 - 1.70 RI, 0 - 95 Brix
- Reproducibility and Accuracy: ±0.0001 RI, ±0.1 Brix
- Control Temperature: 20°C and 25°C
- Ambient Temperature Limit: 10°C to 40°C
- Sample Temperature Limit: -20°C to +250°C
- Temperature Correction Range: 18 - 95°C (for pure sucrose)
- Wavelength: 589.3nm (other wavelengths available)
- Light Source: LED (exp life > 1,000,000 measurements)
- Calibration: 1, 2, or 10 point
- Communication Interface: 2 x R232 port, 1 x Parallel port (USB adaptor available)
- Operating Dimensions: 40cm x 35cm x 15cm
- Operating Weight: 7kg
- Shipping Dimensions: 66cm x 54cm x 40cm
- Shipping Weight: 14kg
- Power Requirements: 100 - 240V/ 50 - 60Hz