J457 AUTOMATIC DIGITAL REFRACTOMETER (Refraktometer)

Smart Measure™ Technology Improves Results!

All 3 models of the J457 Bench-top, Digital, Refractometers come with Smart Measure™ Technology Technology that virtually insures accurate Refractive Index (RI) and BRIX, measurements by automatically detecting when the prism is improperly cleaned, insufficient sample is loaded, or if the instrument is improperly calibrated. Various configurations are available for a small footprint, wall mount, or a remote-read factory configuration. All models come with a digital touch screen, and our Dual Temperature Control System utilizing Peltier Technology.

The J457 Smart Measure™ Advantage

Measurement problem:
> Sample residue is left on the refractometer prism surface Experience has shown that incorrect refractometer measurements are often linked to cross contamination caused by the previous sample being inadvertently mixed with the current sample being measured. Ensuring that the prism surface is properly cleaned between measurements can be difficult for busy environments where multiple operators are involved. Rudolph Research Analytical has solved this problem as well as the related problems an inaccurate measurement can cause.
Smart Measure™ solution:
> Automated clean prism monitoring is now integrated in all Rudolph Research J457 Refractometers. Smart Measure™ knows when the Refractometer’s prism is clean. If the prism surface does not produce the correct "Clean Prism" result then Smart Measure™ notifies the operator that further cleaning of the prism is necessary. Smart Measure™ notifies the operator that it is ready to measure after the prism is satisfactorily cleaned. The refractometer is now ready to make an accurate RI or BRIX reading with a verified clean sample well.

Measurement problem:
> An insufficient amount of sample covering the refractometer’s prism surface A small drop of sample in the center of the prism will measure correctly. A large drop of sample completely covering the prism surface will measure correctly. A small drop on the perimeter of the prism will produce erroneous RI and BRIX readings with the reason often unknown to the operator.
Smart Measure™ solution:
> Automated sample load monitoring – reduces refractometer user error. Smart Measure™ knows when a sample has been loaded on the refractometer‘s prism and immediately begins evaluating various metrics surrounding the sample load. If Smart Measure™ determines that those metrics indicate proper sample loading, it will display the result with a sample quality number. If Smart Measure™ determines that the metrics indicate an improper sample load, Smart Measure™ will ask the operator to clean the prism and re-load the sample.

Measurement problem:
> Sample contamination or improper refractometer calibration An improperly cleaned refractometer prism, where sample residue is left in the measurement well, can mix with a water zero or calibration fluid. This type of contamination during the refractometer calibration process will cause an error across all subsequent measurements, yielding incorrect RI and BRIX readings.
Smart Measure™ solution:
> Automated sample calibration inspection Smart Measure™ is constantly measuring the refractometer’s prism surface and monitoring the value measured against its database of results. If during a water zero calibration the instrument detects a value that is too different from the database or the RI value being input is far from the measured value, it will alert the operator.

Measurement problem:
> The sample has air bubbles that affect measurement results Many samples have air trapped inside them or are carbonated. These samples read well most of the time as long as air bubbles are not trapped between the refractometer’s prism surface and the sample. When this happens the operator gets an erroneous result often referred to as a flyer. These results are called flyers because the measured value is quite different from the expected measurement value.
Smart Measure™ solution:
> Automated sample calibration inspection Smart Measure™ catches these flyers by scanning the detector for varying RI values and then alerts the user to reload the sample. Since the user does not get a value to record until a new sample load is completed, Smart Measure™ greatly reduces the erroneous refractometer measurements from being recorded.

Smart Measure™ Features
Smart Measure™ knows when to measure and display a result even when the operator does not. Smart Measure™ Features J457 (all models) Dirty prism detection Incorrect calibration detection Insufficient sample load detection Cross contamination detection Improper water zero detection Trapped air bubble on prism surface detection
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Rudolph’s exclusive Dual Temperature Control System

All J457 models come with Rudolph's exclusive Dual Temperature Control System utilizing Peltier Technology. The J457 Refractometer heats and cools the sample from both prism surface and sample cover. The insulating cover housing seals the Prism Well Ring to create a uniform temperature environment providing unmatched temperature control uniformity resulting in consistently accurate RI measrurements.

The Rudolph Research J457 line of Refractometers, come in three configurations to match your operating conditions and industry requirements.

J457-SC Standard Bench-top Configuration

J457-SC Refractometer in the Standard Configuration is Rudolph's most popular configuration and provides an excellent combination of a small footprint and a large, easy-to-navigate digital touch screen interface.

J457-WC Wall Mount Configuration

J457-WC Refractometer in a compact Wall Mount Configuration is designed for production environments where water is used for cleaning or there is a lot of sample spillage on the work surface. This configuration is also excellent for situations where there is very little work space available: out on the factory floor or in an over crowded satellite laboratory where there is little to no remaining bench space for a standard Bench-top configuration. .

J457-FC Factory Configuration

J457-FC Refractometer in Factory Configuration is recommended when there is a lot of sample spillage on the laboratory's instrumentation. Factories working with sticky resins and syrups that end up being spilled on the instrumentation are great candidates for the J457-FC as the measurement unit can be as much as six feet away from the display unit.

Rudolph Research Analytical manufactures automatic, digital, bench-top refractometers for a wide variety of industries. With over 5,000 laboratory instruments installed in demanding applications worldwide and thousands still in use that were manufactured in the 70s, 80s, and 90s, Rudolph has established itself as a premier vendor well known for its quality and reliability. Rudolph has also consistently set the pace for innovative design and features that bring new and important functionality to its market leading line of refractometers. Our service and responsiveness come from a deep commitment to serving our customers with integrity, quality and innovation that we have maintained for over 50 years. Please read one of our customer testimonials.

Quality, Innovation, and Integrity with a Global Reach, Rudolph Research Analytical.

J457 Automatic Refractometer Specifications (all models)

Measurement Scales	Refractive Index (nD) BRIX (% sucrose) and up to 100 custom programmed scales
Measurement Range	Refractive Index 1.26 - 1.70, BRIX 0 - 100
Accuracy	Refractive Index ±0.00002, BRIX ±0.015
Reproducibility	Refractive Index ±0.00002, BRIX ±0.015
Resolution	Refractive Index 0.00001 BRIX 0.01
Temp. Control Range	10°C to 100°C (wider temperature range available dependent on ambient conditions and options). Temperature controlled by dual Peltier system.
Temp. Control Reproducibility	±0.01°C
Ambient Temp. Limit	5°C to 40°C
Temp. Correction Range	4°C to 95°C (for sucrose applications)
Sample Temp. Limit	-20°C to 250°C
Optical Wavelength	589.3nm (NaD line)
Response Time	User configurable, generally 30 seconds
Calibration	Using water or NIST traceable fluids. Factory default calibration can always be reset
Prism	Artificial Sapphire
Acid Resistance	Hastelloy™ measurement surface (optional)
Data Storage/Internal Memory	8GB non-removable Compact Flash
Display	10.4 inch diagonal, 800x600 pixels, color, Flat Panel Monitor with Resistant Touch Screen Interface, 400 nits brightness, gasketted for spill protection.
User Interface	Touchscreen
Communication Interface	3 USB, RS232 and Cat5 Network (Ethernet)
Operating Dimensions/Weight	L: 17 ¼”, W: 12”, H: 13” / 23 lbs. L: 43.5 cm, 30.5 cm, 33 cm / 10.4 kg
Power Requirements	100 - 240 volts, 50 Hz - 60 Hz

J457 Configuration Options
All models have Rudolph's exclusive Dual Temperature Control System with Mini Sample Environment
J457-SC Completely integrated, single-unit design.	J457-FC Splash proof measurement unit Display unit with independent bench top option Distance measurement unit can be from display unit: 3ft. or 6ft.	J457-WC Splash proof measurement unit Display unit with wall mount option Distance measurement unit can be from display: 3ft. or 6ft.