Rudolph Research AnalyticalLogo
  • Startseite
  • Produkte
    • Dichtemessgeräte
      • DICHTEMESSGERÄT - TRAGBAR DDM29
      • Dichtemessgerät DDM 2909
      • Dichtemessgerät DDM 2910
      • Dichtemessgerät DDM 2911
      • Dichtemessgerät DDM 2911 PLUS
      • Optionen für die Beladung des Dichtemessgeräts mit Proben
    • Refraktometer
      • REFRAKTOMETER - TRAGBAR J27
      • J47
      • J57 VT
      • J157 PLUS
      • J257
      • J357
      • J457
      • Refraktometer für Kontaktlinsen
    • Polarimeter
      • Autopol I
      • Autopol II
      • Autopol III
      • Autopol IV
      • Autopol V
      • Autopol V PLUS
      • Autopol VI
    • Saccharimeter
      • Autopol IZ & IIZ Saccharimeter
      • Saccharimeter Autopol 589
      • Digitales Saccharimeter Autopol 880 & 880T
      • Saccharimeter Autopol 880 PLUS & 880T PLUS
      • Saccharimeter Probenzellen
      • Saccharimeter-Spezifikationen
    • Automatisierung
      • Autoflex® R817
      • AutoFlex® R827
      • AutoFlex® R837
    • AlcoTest-RI®
      • Brennerei-Finanzierung
    • VeriLinkRx Medikamentenumleitung im Krankenhaus
    • Octapol®.
      • Octapol®.
      • Octapol® Rot
      • Octapol® Schwarz
    • Rudolph-Normen-Labor
  • Ressourcen
    • Service + Wartung
    • Weiße Papiere
    • Videos
    • Technische Bulletins
    • Definitionen
  • Qualität - Akkreditierungen
  • Testimonials
  • Rudolph Research - Allgemeine Informationen
    • Über uns
    • Artikel
    • Messen und Ausstellungen
    • Mitteilungen an die Presse
    • Service + Wartung
    • Kunden/Industriezweige
  • Kontakt
    • Vertriebspartner-Suchmaschine
    • Kontakt Service
    • Teilbestellung/Angebotsanfrage
    • Informationen anfordern
    • Rudolph Brasilien
    • Rudolph Deutschland
    • Rudolph Japan
    • Rudolph Truthahn
    • Karriere
    • Offene Stellen
  • Videos
  • Rudolph-Normen-Labor
  • Shop
    • Wagen
  • J47
  • J57 VT
  • J157 Plus
  • J257
  • J357
  • J457
  • PORTABLE REFRACTOMETER – J27
  • Refraktometer für Kontaktlinsen

Refraktometer 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.


Können Sie dieses Video nicht sehen? Hier klicken

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

Rudolph-Normen-Labor

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.

High Durability Sapphire Prism

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.

Benutzeroberfläche

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: Refraktometer Datenspeicherung
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:

  • Prüfung von Urin SG
  • Quality Control Automation System
  • Automated QC System
  • Ahornsirup-Tests
  • Automatisierte Farbmessung

Automatic Refractometer 20yearbanner

Für alle Rudolph-Instrumente gilt unser exklusives "20 Commitment" für den Service an Ihrem Instrument.

Rudolph Research Analytical bietet ein umfassendes Angebot an vorbeugenden Wartungs- und Serviceprogrammen. Rudolph hat sein Engagement für seine Kunden dadurch unter Beweis gestellt, dass installierte Geräte nicht nur 20 Jahre, sondern in einigen Fällen sogar über 40 Jahre lang betriebsbereit gehalten werden. Dieses langfristige Engagement für den Betrieb unserer Geräte macht die Betriebskosten über die gesamte Lebensdauer eines Rudolph-Geräts zu einem der niedrigsten im Marktsegment der Laborgeräte. Zum Zeitpunkt der Veröffentlichung dieses Dokuments gibt es keinen anderen Hersteller von Laborgeräten, der 20 Jahre lang Service und technischen Support garantiert. Sehen Sie sich die gesamte 20-Service-Garantie an.

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
Messskalen Refractive Index (RI) BRIX (% sucrose) 100 User Programmable Scales
Messbereich RI 1.26 - 1.72 , BRIX 0 - 100%, Urine SG 1.0000-1.0400
Auflösung RI 0.00001 BRIX 0.001
Reproduzierbarkeit RI ±0.00002, BRIX ±0.015
Genauigkeit RI ±0.00002, BRIX ±0.015
Optical Wavelength 589.3nm
Prisma Synthetischer Saphir
Lichtquelle Light Emitting Diode (est. life: >100,000 hrs.)
Response Time User configurable -- can be less than 2 seconds
Kommunikationsschnittstelle 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
Ambient Temp. Limit 5ºC - 40ºC
Temp. Correction Range 4ºC - 95ºC (for pure sucrose solutions)
Temp. Measurement & Control Prism surface and presser
Kalibrierung Using water or NIST traceable standards
Betriebliche Abmessungen L: 17.25" W: 12" H: 13" / 23 lbs.
Versand Abmessungen L: 27" W: 21" H: 17" / 30 lbs.
Power Requirements 100-240 volts, 50 Hz - 60 Hz

Refraktometer-Infos

  • Refraktometer J47
  • Refraktometer J57-VT
  • Refraktometer J157 PLUS
  • Refraktometer J257
  • Refraktometer J357
  • Refraktometer J457
  • TB947 Refraktometer Auswahlhilfe
  • Registrieren Sie Ihr Handheld-Gerät
  • Refraktometrie - Messung des Brechungsindexes
  • Refraktometer Weißbücher
  • Refraktometer Informationsanfrage
  • Refraktometer-Auswahlhilfe
  • Refraktometer Aromen Duftstoffe Kosmetika
  • Refraktometer für die chemische Industrie
  • Refraktometer für die Zuckermüllerei, Raffination und Verarbeitung
  • Refraktometer Erdöl
Technische Broschüre als PDF anzeigen

Produkte

  • Dichtemessgeräte
  • Refraktometer
  • Polarimeter
  • Saccharimeter
  • Automatisierung

Ressourcen

  • Vertriebspartner-Suchmaschine
  • Videos
  • Artikel
  • Weiße Papiere
  • Technische Bulletins
  • Qualität
  • Wartung und Instandhaltung

Allgemeine Informationen

  • Über uns
  • Mitteilungen an die Presse
  • Kunden/Industriezweige

Global Distributors

Globale Verteiler

Allgemeine Anfragen

Rudolph Forschung Analytik
55 Newburgh Road Hackettstown, NJ, 07840 USA

Telefon: 973-584-1558
Fax: 973-584-5440
info@rudolphresearch.com
  • Startseite
  • Produkte
  • Ressourcen
  • Qualität - Akkreditierungen
  • Testimonials
  • Rudolph Research - Allgemeine Informationen
  • Kontakt
  • Videos
  • Rudolph-Normen-Labor
  • Shop

Copyright © 2025 Rudolph Research Analytical

  • Startseite
  • Produkte
    • Dichtemessgeräte
      • DICHTEMESSGERÄT - TRAGBAR DDM29
      • Dichtemessgerät DDM 2909
      • Dichtemessgerät DDM 2910
      • Dichtemessgerät DDM 2911
      • Dichtemessgerät DDM 2911 PLUS
      • Optionen für die Beladung des Dichtemessgeräts mit Proben
      • Zurück
    • Refraktometer
      • REFRAKTOMETER - TRAGBAR J27
      • J47
      • J57 VT
      • J157 PLUS
      • J257
      • J357
      • J457
      • Refraktometer für Kontaktlinsen
      • Zurück
    • Polarimeter
      • Autopol I
      • Autopol II
      • Autopol III
      • Autopol IV
      • Autopol V
      • Autopol V PLUS
      • Autopol VI
      • Zurück
    • Saccharimeter
      • Autopol IZ & IIZ Saccharimeter
      • Saccharimeter Autopol 589
      • Digitales Saccharimeter Autopol 880 & 880T
      • Saccharimeter Autopol 880 PLUS & 880T PLUS
      • Saccharimeter Probenzellen
      • Saccharimeter-Spezifikationen
      • Zurück
    • Automatisierung
      • Autoflex® R817
      • AutoFlex® R827
      • AutoFlex® R837
      • Zurück
    • AlcoTest-RI®
      • Brennerei-Finanzierung
      • Zurück
    • VeriLinkRx Medikamentenumleitung im Krankenhaus
    • Octapol®.
      • Octapol®.
      • Octapol® Rot
      • Octapol® Schwarz
      • Zurück
    • Rudolph-Normen-Labor
    • Zurück
  • Ressourcen
    • Service + Wartung
    • Weiße Papiere
    • Videos
    • Technische Bulletins
    • Definitionen
    • Zurück
  • Qualität - Akkreditierungen
  • Testimonials
  • Rudolph Research - Allgemeine Informationen
    • Über uns
    • Artikel
    • Messen und Ausstellungen
    • Mitteilungen an die Presse
    • Service + Wartung
    • Kunden/Industriezweige
    • Zurück
  • Kontakt
    • Vertriebspartner-Suchmaschine
    • Kontakt Service
    • Teilbestellung/Angebotsanfrage
    • Informationen anfordern
    • Rudolph Brasilien
    • Rudolph Deutschland
    • Rudolph Japan
    • Rudolph Truthahn
    • Karriere
    • Offene Stellen
    • Zurück
  • Videos
  • Rudolph-Normen-Labor
  • Shop
    • Wagen
    • Zurück
  • English
  • Português Brasileiro
  • Türkçe
  • Español
  • हिंदी