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Refractómetro J357

Automatic Refractometer, J357 Offers Highest Performance for Research Labs.

The Rudolph J357 Automatic Refractometer, designed as a research quality instrument offers one of the highest measurement ranges of any instrument in the Rudolph refractometer product line. This instrument offers the same extra wide refractive index measurement range as our chemical industry refractometer models combined with the high accuracy of our food industry refractometer models. It also offers very powerful automatic electronic temperature control (heating and cooling) and is able to make RI and BRIX measurements at up to 100 °C.

Rudolph Research J357 Automatic Refractometer Video

The J357 is a perfect choice for the most demanding pharmaceutical, chemical, petroleum, essential oils, fragrance and cosmetic refractometer users.


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Simple Automatic Refractometer Operation

Operating the J357 Automatic refractometer is as simple as placing a sample on the artificial sapphire prism, closing the presser and reading the answer on the Digital Display — all in just a few seconds. There are no shadow lines to match and there is no eyepiece requiring any kind of operator determination or manual adjustment. When the “measure when stable mode” is selected, the J357 Refractometer automatically waits until the sample has been heated or cooled to a predefined temperature before initiating a measurement.

Automatic Refractometer – Interface Solutions

Rudolph allows the lab manager to select from different interface options because we understand laboratories and manufacturing floors have different needs when it comes to the information required for monitoring a process. Your instrument’s interface can be customized to meet the information your application and environment demand whether you choose our full featured interface or our Load-and-Go interface. The J357 offers laboratory flexibility with industrial strength and simplicity making this model series at home on the laboratory bench or on the factory floor.

Full Display with Smart Measure

Automatic Refractometer Display

Automatic Refractometer – Load – and – Go Display

Automatic Refractometer Load and Go Screen

Automatic Refractometer Trend Analysis Display

 Refractometer Trend Analysis Screen

Trend Analysis – On-Board Data Collection and Specification Range Monitoring

In a modern factory the most precious commodity is time. When a process starts to move outside its limits people want to know FAST. In other words, they want to correct the problem, preferably while it’s still small and before a product goes out of specification. The Rudolph live reading and trend analysis feature allows users to easily and quickly see how a process is going and catch minor deviations before they become major ones.

Even in the most tightly controlled manufacturing environments things do occasionally go out of specification. When out of specification conditions happen, material has to be quickly identified. Decisions have to be made as to what to do with the product. Long term data collection is a part of any good process. Knowing when and where the out of specification condition happened is equally as important. Rudolph Trend Analysis™ software quickly shows a supervisor the process history and where the problem occurred.

Dual Electronic Temperature Control to 100 °C

Unlike other temperature controlled refractometers, the J357 has temperature control from both above and below the sample. The sample cover is controlled to the same temperature as the prism. When lowered, is designed to provide a temperature controlled micro environment. It provides unrivaled temperature stability, fast measurement time and minimal evaporation. With the Auto Measure option, the sample cover can also be used to initiate measurement.

Optional Sample Presser

The Rudolph J357 is available with an optional Temperature Controlled Sample Presser that touches the sample. Compared with the standard temperature controlled cover, the optional presser reduces the empty volume of the measurement area. Therefore decreasing evaporation and at the same time helping to evenly spread semi solid materials over the measurement prism. This feature offers improved performance on many samples.

More about Rudolph Refractometer Sample Cover Options

Laboratorio de Normas Rudolph

Automatic Refractometer Calibration

The J357 offers 1 point, 2 point or a full multi-point calibration. Calibration can be done at 20°C, 25°C or any user selectable temperature within the available range. However, regardless of how many times the refractometer has been calibrated, it can always be restored to the initial factory calibration.

On-Board Custom Scales

The J357 Refractometer is available with 100 possible programmable scales. Custom scales can be set up in a few minutes. Simply enter 2, 6 or 10 data points of concentration and corresponding RI (refractive index) value, press Compute and the instrument creates a new custom scale.

Prisma de zafiro de alta durabilidad

All Rudolph J series refractometers offer a sapphire prism for high mechanical and chemical durability. The sample well is acid resistant 316 stainless steel with a Techtron sealing ring. There is no lamp to change, the LED light source is guaranteed for 1,000,000 measurements.

An Automatic Refractometer that is Easy to Clean

Automatic Refractometers - Easy to clean
No matter how good an automatic refractometer is, accurate results will only be obtained if the instrument is clean. The Rudolph J Series refractometers offer a flat, easy to clean prism that makes this process simple even with sticky samples like sugars, syrups, and petrochemicals.

Interfaz de usuario

A large 7.5cm x 10cm cold cathode florescent back lit graphics, digital LCD allows the scale, sample temperature, set temperature, air temperature, time, date and temperature correction status to be easily viewed. All functions are activated through a touchscreen panel. The touchscreen will not wear out or be misplaced like traditional or detachable keypads. The digital touchscreen is resistant to fingernails, sharp objects, chemicals, and acids.

No Water Bath Needed

Automatic Refractometers Prism
Having Rudolph’s J357 fully automatic electronic temperature control means:

  • A significant savings of bench space is gained because the water bath is eliminated.
  • Integrated temperature control, the instrument knows when to measure and records both the Refractive Index measurement and the temperature.
  • Hot liquid from a bath can present a significant danger in the laboratory. In the event of a split hose, the J357 doesn’t use liquid and thereby eliminates this risk.
  • Eliminating the water bath removes the most maintenance intensive part of a Refractometer. Water baths need to be regularly filled, dosed with algaecide and cleaned.

Traceability & 21 CFR Part 11 Compliance

  • All measurements are made automatically, which eliminates the need for operator judgment.
  • Calibration with fluids traceable to NIST and calibration data securely stored and available for review.
  • Temperature can be calibrated against a traceable thermometer.
  • Operator Traceability, full 21 CFR Part 11 compliant password system.
  • Verification step with electronic signature.

Networking, Data Recording, and Data Management

The J357 offers several options for data storage. Data may be stored internally by means of an 8 MB Internal Compact Flash Memory, to a network via RS232, Cat 5 Network port, or via 3 rear and 1 side USB Ports. Storage options include writing and storing to a network, sharing to a LIMS system, and Storage to a removable USB drive.  For all data storage options see: Almacenamiento de datos del refractómetro
Rear Panel

A Automatic Refractometer Suitable for a Wide Range of High Demand Environments

  • Petroleum and Petrochemical Laboratories where the J357’s ability to measure at up to 100ºC without a water bath makes the instrument ideal for ASTM D1218, D2140, D1747, and D5006.
  • Research Laboratories where the wide range and high accuracy of the Rudolph J357 means researchers have the maximum chance of measuring newly synthesized products.
  • Central Research and Reference Laboratories where having the most accurate results available for setting standards for an organization or a country is needed.
  • Chemical Laboratories can measure more viscous products with a level of accuracy previously available only in narrow range food instruments.

Return to view the entire Rudolph Research Product Line

Adding Automation can Increase Throughput:

  • Análisis de SG en orina
  • Quality Control Automation System
  • Automated QC System
  • Pruebas del jarabe de arce
  • Medición automatizada del color

Automatic Refractometer 20yearbanner

Todos los instrumentos Rudolph llevan nuestro exclusivo 20 Compromiso de servicio de su instrumento.

Rudolph Research Analytical ofrece una amplia gama de Programas de Mantenimiento Preventivo y Servicio. Rudolph ha demostrado su compromiso con sus clientes manteniendo operativos los instrumentos instalados, no sólo durante 20 años, sino en algunos casos durante más de 40 años. Este compromiso a largo plazo de mantener nuestros instrumentos en funcionamiento hace que el coste de propiedad, a lo largo de la vida útil de un instrumento Rudolph, sea uno de los más bajos del segmento de mercado de los laboratorios. En la fecha de publicación de este documento, no existe ningún otro fabricante de instrumentos de laboratorio que garantice el servicio y la asistencia técnica durante 20 años. Ver toda la Garantía de 20 años de servicio.

Adding automation to this instrument will allow you to make multiple measurements at the same time, making this a robust Quality Control Automation System.
You only need one or more instruments to add either a carousel or drawer configuration to your Automated QC System

J357 AUTOMATIC Specifications
Escalas de medición Refractive Index (RI) BRIX (% sucrose) 100 User Programmable Scales
Rango de medición RI 1.26 - 1.72 , BRIX 0 - 100%, Urine SG 1.0000-1.0400
Resolución RI 0.00001 BRIX 0.001
Reproducibilidad RI ±0.00002, BRIX ±0.015
Precisión RI ±0.00002, BRIX ±0.015
Longitud de onda óptica 589.3nm
Prisma Zafiro sintético
Fuente de luz Light Emitting Diode (est. life: >100,000 hrs.)
Tiempo de respuesta User configurable -- can be less than 2 seconds
Interfaz de comunicación 3 USB RS232 ports Cat5 Network (Ethernet)
Analog Control 0-10 volts, 4-20 mA
Temp. Control Range (Within 10C of ambient) 10ºC - 100ºC *other temperature control options are available - 5ºC – 110ºC available with temperature boost option.
Temp. Sensor Accuracy ±0.05ºC
Temp. ambiente Límite 5ºC - 40ºC
Temp. Rango de corrección 4ºC - 95ºC (para soluciones de sacarosa pura)
Temp. Measurement & Control Prism surface and presser
Calibración Using water or NIST traceable standards
Dimensiones de funcionamiento L: 17.25" W: 12" H: 13" / 23 lbs.
Dimensiones de envío L: 27" W: 21" H: 17" / 30 lbs.
Requisitos de potencia 100-240 voltios, 50 Hz - 60 Hz

Refractómetro Info

  • Refractómetro J47
  • Refractómetro J57-VT
  • Refractómetro J157 PLUS
  • Refractómetro J257
  • Refractómetro J357
  • Refractómetro J457
  • Guía de selección del refractómetro TB947
  • Registre su instrumento portátil
  • Refractometría - Medición del índice de refracción
  • Refractómetros White Papers
  • Refractómetro Solicitud de información
  • Guía de selección de refractómetros
  • Refractómetros Aroma Fragancia Cosmética
  • Refractómetros para la industria química
  • Refractómetros para molienda, refinado y procesamiento de azúcar
  • Refractómetros Petróleo
Ver el folleto técnico en PDF

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Fax: 973-584-5440
info@rudolphresearch.com
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  • Inicio
  • Productos
    • Densímetros
      • DENSÍMETRO - PORTÁTIL DDM29
      • Medidor de densidad DDM 2909
      • Medidor de densidad DDM 2910
      • Medidor de densidad DDM 2911
      • Densímetro DDM 2911 PLUS
      • Opciones de carga de muestras del densímetro
      • Volver
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      • REFRACTÓMETRO - PORTÁTIL J27
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      • Refractómetros para lentes de contacto
      • Volver
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