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Refratômetro J457

Laboratory Refractometer, Rudolph’s J457 with Smart Measure™ Technology Improves Results!

The J457 Laboratory Refractometer is the most capable instrument in the Rudolph Research Refractometer Product Line. 3 models/configurations are available. All come with Rudolph’s exclusive Smart Measure™ Technology that virtually insures accurate Refractive Index (RI) and BRIX, measurements by automatically detecting sample problems. The J457 can determine 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.

See the Rudolph Research J457 Laboratory Refractometer in action!


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The J457 Laboratory Refractometer, Simple to Operate Without Sacrificing Accuracy or Capabilities.

The Rudolph J457 Laboratory Refractometer can be configured with a Load and Go Measurement feature for your routine measurements tasks. Initiating a measurement begins by placing a sample on the prism. There are no buttons to press and all measurements are made  based on the per-determined Method. This allows the J457 to maintain it’s high level of accuracy and performance with Load and Go convenience.

Take a look to see how easily routine measurements can be made in the following video.

Versatile Data Storage Options

The J457 Laboratory Refractometer offers various data storage options to meet the needs of any lab and any compliance requirement. With 32mb of on-board memory the J457 can work on a stand-alone basis or memory sticks can be utilized to expand memory or make data easily transportable to a PC. The J457 is easily connected to your network or may be linked with a PC. For all data storage options see: Refractometer Data Storage

The J457 Laboratory Refractometer with Smart Measure™ Advantage

Measurement problem:

Sample residue is left on the refractometer prism surface
J457 Refractometer Sample Well
Experience has shown that incorrect laboratory 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.

Automated clean prism monitoring is now integrated in the Rudolph Research J457 Laboratory Refractometer.

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 Laboratory Refractometer 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.
J457 Refractometer Sample Well
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.

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.

Sample contamination or improper refractometer calibration.
J457 Refractometer Sample Well
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.

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.
J457 Refractometer Sample Well

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.

Laboratório de padrões Rudolph

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 Laboratory Refractometers (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
Refractometer Sample Well, improper sample loading

Rudolph’s exclusive Electronic 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 measurements.

Mais sobre as opções de capa de amostra do refratômetro Rudolph

Versatile Instrument and display options

The Rudolph Research J457 line of Laboratory Refractometers, come in multiple measurement unit and display configurations to match your operating conditions and industry requirements.

The J457-CB With User Selected Display

CompUbility logo

The CB can be added to all OM versions of the J457;                      Refractometer Optics Module
this includes the EP (pictured above), DP, CP, and CC.
There are two versions of the below Computer Bridge. CB
allows the optics of the J series refractometer to be
operated from an external PC using Windows 10 or later. CBS
provides the same function, and includes a Microsoft Surface.
Having a complete choice of any PC based display is CompuBility
allowing users choices and companies the ability to tailor the laboratory
refractometer to the application.

Refractometer PC Display

Laboratory Refractometer with PC Display

  • Many users are happy to use their own
    computer to control laboratory equipment. It
    does not suit all applications, but it does offer
    some advantages:
  • A PC that is made by millions to a
    commercial standard is always going to be
    much cheaper than a controller made by
    hundreds to an industrial standard
  • It allows the user’s IT department greater
    control over updates, exporting and backups.

Laboratory Refractometer with Tablet Display

Using a tablet can be a great choice in certain situations:Refractometer with Tablet Display

  • A tablet can be more robust than a PC and easier to
    locate out of a wet area in an industrial environment
  • A tablet is easier to move when the refractometer is being
    used in multiple locations such as being wheeled around a
    building on a cart.

J457-SC Laboratory Refractometer in Standard Bench-top Configuration.

Temperature Controled Automatic Refractometer

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 Laboratory Refractometer in a 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.
Refractometer for Wall Mounting

J457-FC Laboratory Refractometer in 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.
J457 Refractometer in a factory mounted configuration
Pharmacuetical Laboratory Refractometer J457 Rudolph Research

A Laboratory Refractometer for special measurement applications:

RI Measurement Kit for Solids, Semi-Solids, and Films.
Refractive Index measurement of solids and semi-solids is useful in laboratories for insuring the quality and consistency of transparency and pigmentation. Refractive Index is often measured on incoming materials and finished products. Highly accurate RI measurements are possible with the J457 Refractometer utilizing Rudolph’s Solid / Film measurement option and accessories kit. See our video about Measuring the RI of Solids, Semi Solids and Films.
Solid Film Kit
Return to view the entire Rudolph Research Product Line

A adição de automação pode aumentar o rendimento:

  • Teste de SG da urina
  • Sistema de automação de controle de qualidade
  • Sistema automatizado de controle de qualidade
  • Teste de xarope de bordo
  • Medição automatizada de cores

Faixa de 20 anos

Todos os instrumentos Rudolph contam com nosso exclusivo Compromisso 20 para a manutenção de seu instrumento.

A Rudolph Research Analytical oferece uma ampla gama de programas de manutenção preventiva e serviços. A Rudolph tem demonstrado um compromisso com seus clientes, mantendo os instrumentos instalados em operação, não apenas por 20 anos, mas em alguns casos por mais de 40 anos. Esse compromisso de longo prazo em manter nossos instrumentos em funcionamento faz com que o custo de propriedade, durante a vida útil de um instrumento Rudolph, seja um dos mais baixos no segmento de mercado de laboratório. Na data em que este documento foi publicado, não havia nenhum outro fabricante de instrumentos de laboratório garantindo serviço e suporte técnico por 20 anos. Veja a íntegra da Garantia de Serviço de 20 anos.

By adding additional systems through automation, this High-Throughput Laboratory Automation will make the workload less demanding on your employees.

J457 Automatic Refractometer Specifications (all models)
Escalas de medição Refractive Index (nD) BRIX (% sucrose) and up to 100 custom programmed scales.
Faixa de medição Refractive Index 1.26 - 1.72, BRIX 0 - 100% Urine SG 1.0000-1.0400
Precisão Refractive Index ±0.00002, BRIX ±0.015
Reprodutibilidade Refractive Index ±0.00002, BRIX ±0.015
Resolução Refractive Index 0.00001 BRIX 0.001
Temp. Control Range 10°C to 110°C *other temperature control options are available
Repetibilidade da temperatura +/- 0.002
Temp. ambiente Limite 5°C to 40°C
Temp. Faixa de correção 4°C to 95°C (for sucrose solutions)
Sample Temp. Limit -20°C to 250°C
Comprimento de onda óptica 589.3nm (NaD line)
Fonte de luz LED (Estimated life 100,000 hours)
Tempo de resposta User configurable, generally less than 30 seconds
Calibração Using water or NIST traceable fluids. Factory default calibration can always be reset
Prisma Artificial Sapphire
Resistência a ácidos Hastelloy™ measurement surface (optional)
Data Storage/Internal Memory 32 GB non-removable Compact Flash
Tela 10.4 inch diagonal, 800x600 pixels, color, Flat Panel Monitor with Resistant Touch Screen Interface, 400 nits brightness, gasketted for spill protection.
Interface do usuário Tela sensível ao toque
Interface de comunicação 3 USB, RS232 e rede Cat5 (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
Requisitos de energia 100 - 240 volts, 50 Hz - 60 Hz

Informações sobre o refratômetro

  • Refratômetro J47
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  • Refratômetro J357
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  • Guia de Seleção do Refratômetro TB947
  • Registre seu instrumento portátil
  • Refratometria - Medição do índice de refração
  • White Papers sobre refratômetros
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  • Guia de seleção de refratômetro
  • Refratômetros Aroma Fragrância Cosméticos
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  • Refratômetros Petróleo
Ver folheto técnico em PDF

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Perguntas gerais

Rudolph Research Analytical
55 Newburgh Road Hackettstown, NJ, 07840 USA

Telefone: 973-584-1558
Fax: 973-584-5440
info@rudolphresearch.com
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