Refractometer J57-VT

 

Benchtop Refractometer for the Food Quality Testing. When QC Counts

The J57-VT High Accuracy Refractometer and J57-VT Wide Range Refractometer are part of the Rudolph Research Product Line. The Rudolph J57-VT High Accuracy and J57 Wide Range refractometers are designed to meet the unique needs of food quality testing where the automatic refractometer is viewed as a quality control (QC) tool rather than a laboratory instrument. A single flat measurement surface, automatic electronic temperature control, and one button measurement capability make it perfect for heavy use food industry applications. In the food industry, fast, automatic, and accurate Brix readings are required.

Excellent for QC when Quality is truly important in the Food and Beverage product industry.

Refractometer J57-VT

Key Features

  • Easy to clean, shallow Sample well. A clean sample well is imperative to accurate measurements
  • 3-Year Domestic Warranty
  • Lifetime Support Guarantee
  • Modern Refractometer Data Storage
  • Wide Measurement Range for the Chemical Industry
  • Durability to stand up to the harshest environments
  • High Accuracy
  • Most importantly, rugged design as well as small foot print
  • In addition, J57VT offers an wide Refractive Index (RI) measurement range from 1.26 – 1.70

Specifications

Measurement ScalesRefractive Index (RI) BRIX (% sucrose) Temperature Corrected BRIX Temperature Corrected RI 100 User Programmable Scales
Measurement RangeJ57-VT HA – 1.32 – 1.53 RI, 0 – 100 BRIX J57-VT WR – 1.3 – 1.7 RI, 0 – 100 BRIX
ResolutionJ57-VT HA – ±0.00001 RI, ±0.01 BRIX J57-VT WR – ±0.0001 RI, ±0.01 BRIX
RepeatabilityJ57-VT HA – ±0.00002 RI, ±0.01 BRIX J57-VT WR – ±0.0001 RI, ±0.05 BRIX
AccuracyJ57-VT HA – ±0.00002 RI, ±0.01 BRIX J57-VT WR – ±0.0001 RI, ±0.05 BRIX
Optical Wavelength589.3nm (other wavelengths available)
PrismSynthetic Sapphire
Light SourceLight Emitting Diode (est. life: 100,000 hrs.)
Response TimeUser configurable, can be less than 5 seconds
Communication Interface1 USB, 1RS232
Temperature ControlVariable Temperature Control from 10ºC 10 65ºC
Ambient Temp. Limit5ºC – 40ºC
Temp. Correction Range4ºC – 95ºC (for pure sucrose solutions)
CalibrationUsing water or NIST traceable fluids. Factory Default calibration can always be reset.
Operating DimensionsL: 12″ W: 6″ H: 5″ / 7.8 lbs. L: 31 cm W: 15.5 cm H: 13 cm / 3.5 kg
Shipping DimensionsL: 17″ W: 12″ H: 13″ / 11.8 lbs. L: 42.5 cm W: 30 cm H: 34 cm / 5.5 kg
Power Requirements100-240 volts, 50 Hz – 60 Hz

Rudolph J47 & J57
Series of Refractometers

J57 Benchtop Refractometer
Comes in 2 models

Model J57-VT High Accuracy

Where High Accuracy is critical the J57-VT HA Model Refractometer offers Accuracy of ±0.00002 RI and Brix Accuracy of ±0.01 with an RI Measurement range of 1.32-1.53 and Brix measurement range of 0-100. The capabilities of J57-VT HA are designed to meet the application requirements of the Food and Beverage Industry.

Model J57-VT Wide Range

Where Measurement Range is most importance the J57_VT WR Model Refractometer offers an RI Measurement range of 1.3-1.7 and Brix measurement range of 0-100 with Accuracy of ±0.0001 RI and Brix Accuracy of ±0.1. The Rudolph J57-VT WR is an excellent fit for Chemical Industry Laboratories where applications often require a wider RI measurement range.

Unique Features and Capabilities
to meet your Application

Rudolph J57-VT High Accuracy refractometer features a fully automatic measuring system. The operator simply places the sample on the prism, presses a button and the results are 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.

BRIX readings are very sensitive to temperature changes while food industry samples tend to arrive at the refractometer either very hot or very cold. Temperature related variations in BRIX readings can be minimized by using the ICUMSA temperature correction for sucrose, but only minimized, not eliminated. The ICUMSA Temperature Correction Table was developed for a sucrose and water solution and the further from pure sucrose and water the sample is, the more inaccurate Temperature Correction becomes.

Temperature Correction also requires that the sample temperature remains stable during the measurement. So a room temperature sugar solution measurement works reasonably well, but if a sauce sample or syrup comes from a kettle or a refrigerator, temperature correction will be almost useless. The solution to measuring hot samples has always been to control the sample temperature with a circulating water bath and then clean and maintain the water bath. This is still not ideal as bringing samples to temperature with a water bath is slow and maintaining a water bath is time consuming. The J57-VT refractometers addresses this issue with a built in, maintenance free, electronic temperature control which provides the best solution for these real world problems: absolute accuracy regardless of sample type and excellent thermo-stability no matter what the sample or environmental temperatures are. Standard configuration includes sample Temperature Control from 10ºC to 65ºC.

The J57-VT HA was designed for the food industry with a BRIX range of 0 – 100% and a Refractive Index range of 1.33 – 1.53 RI. The J57-VT HA has a ±0.01 BRIX and ±0.00002 Refractive Index (RI) accuracy, which matches the accuracy of Rudolph’s best refractometers. Combined with absolute temperature control the J57-VT HA delivers high accuracy and consistent readings, perfectly designed for rigorous Food Industry applications.

Regardless of the specified instrument accuracy the real world performance will always depend on how well the instrument is cleaned between samples. The J57-VT refractometers address this issue by providing a very flat easy to clean measurement surface with no corners or crevices that tend to trap sugars, syrups, and other food industry samples.

When a traditional automatic refractometer is used in a high throughput application, prism replacement becomes a regular task. This is because traditional Abbe refractometers have glass prisms which are much softer than the sapphire prism of the rugged J Series refractometers and thus more prone to scratching and general wear and tear which can result in inaccurate readings potentially unknown to the operator.

Traditional industry has used an ABBE refractometer either with or without a water bath. The cost of replacing the water bath and the Abbe dual glass prism over time makes the cost of owning a Rudolph Research J57-VT with its single sapphire prism and electronic temperature control, actually less than the cost of an Abbe over their comparable useful lives. The speed and accuracy of readings also increases productivity and reduces costly mistakes that can be potentially caused by inaccurate readings.

The J57-VT 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.

Versatile laboratory instruments have advantages when applications change however this versatility can also lead to confusion during regular production use with extra buttons and by forcing operators to interpret extra results that have no relevance. The J Series customizable digital display allows the instrument to be configured to exactly what is required for each application. The customizable keypad can be “locked out” or just a few keys can be operable, making for an even faster user learning curve. The lockout function, calibration and other functions are all password protected.

All functions of the J57-VT Automatic Refractometers are activated through a large 4.3″ 480dpi, digital, color TFT LCD touch screen. The 70mm X 75mm measure button on the J57-VT is designed to allow an operator wearing gloves to activate measurement with an elbow or side of a hand. The sealed touchscreen is resistant to fingernails, sharp objects, chemicals and acids.

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-VT can be set up as a one-button instrument for factory environments.

In today’s highly regulated environment many users find hard copy or computer record keeping essential. The J57-VT comes complete with an RS232 port and a forward facing USB port.

Target
Markets

Chemical Concentration Measurements

Description

Many chemicals are sold and shipped as solutions. Both suppliers and end users want to know the exact concentration of the solution. That concentration determines the value of the material and, from a users point of view, how much is added to the process mixture. Refractometers are an extremely quick way to validate starting material purity, measure concentrations, and validate mixture end points. Our rugged instruments can be located in a load out area or beside a production line, not just in a lab.

Why Choose Rudolph

  • Chemical measurement needs temperature control, not correction, and all Rudolph refractometers from the J57 above have this.
  • Confidence in the products you ship to your customers with validated instruments with validated standards and measurement processes.
  • Many solvents have Refractive Indices(RI) outside of the range that a food refractometer can measure; a specialty chemical model is needed.

Typical Rudolph Users

  • Most countries now require that urea solutions be a part of diesel exhaust emission systems. This fluid goes by different names such as Adblue, DEF and ARLA. Manufacturers like YARA and distributors like BRENNTAG use Rudolph.
  • Manufacturers of polymers like Nylon need to monitor raw material solutions. Dupont / Kordsa are just one of many Rudolph users.
  • Urea Formaldehyde and Phenol Formaldehyde resins are critically important to the wood industry. Manufacturers like Hexion and Dynea use Rudolph as part of process control.

Three Choices From Rudolph

J57

Very simple to operate, minimal bench space and a good choice when there is just one dedicated application.

J357

Very wide range so it can measure materials dissolved in fluorocarbon solvents. Flat, easy to clean prism, with on-board concentration programming.

J457

All the advantages of the J357 but operating from a seperate computer allowing easy data transfer to SAP, Excel and similar.

Food Quality Control

Description

Measurement of Brix is central to food manufacturing. Consistant Brix measure is key to product consistency. Food product profit margins are tight, so careful monitoring of the quality of incoming raw material and also strict monitoring of how much of that raw material is used in the process are the main drivers of factory profit.
Brix Range 0-100; RI Range 1.33-1.53; 1.29-1.72

Why Choose Rudolph

  • Accuracy in the second decimal place in Brix means the ability to stay closer to specification.
  • Temperature control allows the instrument to be calibrated with traceable references to meet ISO and similar standards.
  • Flat, easy clean prism means better results even when used by non-laboratory trained operators.

Typical Rudolph Users

  • Cargill and ADM uses Rudolph Refractometers in ingredient manufacturing plants globally.
  • Mars Wrigley use Rudolph instruments to check the quality of incoming flavor materials.
  • Nestle uses Rudolph to check the quality of tomato products for prepared meals.

Three Choices From Rudolph

J57

Very simple to operate, minimal bench space and a good choice when there is just one dedicated application.

J357

Very wide range so it can measure materials dissolved in fluorocarbon solvents. Flat, easy to clean prism, with on-board concentration programming.

J457

All the advantages of the J357 but operating from a seperate computer allowing easy data transfer to SAP, Excel and similar.

Biological Fluid Analysis

Description

Samples are sometimes very difficult to obtain, and the refractometer test is a “non-destructive” test on a very small sample volume. The sample might come from a small animal and the volume is minimal. Samples from humans are subject to regulations and right of refusal, and retaining the sample is important. The number of samples tested is often very high, and the refractometer is a rapid test. There is a lot of variability between biological entities and, in the case of humans, testing often matters by individual, it’s not enough to just test one or two and use that for the group. Large samples can be divided up into smaller volumes for repeat testing.

Why Choose Rudolph

  • Fast measure speed enables a laboratory to process a large number of samples on one instrument.
  • Ultra-low volume models available to measure with small amounts of sample.
  • Automated systems for easy measurement of large sample sets.

Typical Rudolph Users

  • Labcorp, Quest and Clinical Reference Labs all use J57 refractometers for workplace drug testing.
  • Mt. Sinai Hospital uses a J457ULV for medical research.
  • The Australian Sports Anti-Doping Authority uses a J457/R837 for monitoring the presence of performance enhancing drugs in both local and international sports.

Three Choices From Rudolph

J57
HA-EP

The standard reference instrument for urine Specific Gravity(SG) measurement for workplace drug testing.

J457
ULV

Ultra low volume design (as low as 10μl) for research applications.

J457
OMDP

Automated system
for high volume testing.

Sugars

Description

The sugar processing industry uses refractometers across the entire production process. Whether the source is sucrose from sugar cane or sugar beets, or corn based sweeteners our refractometers monitor Brix and Refractometer Dissolved Solids (RDS) in all aspects of our customers processing. Accurate Brix and RDS measurement is a key to process control, and end product purity all which help sweeten the bottom line.

Why Choose Rudolph

  • Very easy to operate for rotating seasonal staff.
  • Temperature control allows the instrument to be calibrated with traceable references to meet ISO and ICUMSA.
  • Flat, easy clean prism means better results even when used with a variety of sugar sample types.

Typical Rudolph Users

  • American Sugar Refining uses many J57 refractometers in both processes and finished product laboratories around the world.
  • Western Sugar uses many J57 instruments in factory labs.
  • Dangote Sugar uses J457 refractometers in factories in Africa.

Three Choices From Rudolph

J57 HA-EP

Very simple to operate, minimal bench space, temperature controlled.

J457KVP

Pour-In design allows for high through put of similar samples with regular prism cleaning.

Autopol 880 & J157

Combined solution for sugar purity measurements.

System Components

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