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Target Analysis’ repair services for GCs, HPLCs, mass spectrometers, and other lab instruments include warranty coverage, service agreements, and preventative maintenance. Whether you are seeking instrument repair or scheduling a service call for lab equipment repair.
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Target Analysis IQ/OQ/PQ procedures strictly follow good laboratory practices (GLP), which require that all laboratory instrumentation be inspected, cleaned, and maintained. We provide an independent and comprehensive testing service for Mass Spectrometry & Chromatography instruments to help you meet your regulatory and operational requirements and standards.
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Application support is a service provided by our team that gives you a strategy and technique to quickly and confidently develop high-quality methods. You will learn a proven technique that will guide you step-by-step through the process of method development, applying principles that will make the process more efficient. Application support can take the form of a course, training, or development of an analytical method based on your real samples.
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J157 PLUS available in several models and option configurations.
The Rudolph J157 Digital Refractometer offers high performance and a range of features to suit many demanding applications in laboratories and harsh industrial environments. Rudolph Research Analytical, working together with refractometer (Refractometer) users from various countries and disciplines, has developed the J157 series of Digital Refractometers. The Rudolph J157 benchtop refractometer line combines the features, measurement range, and accuracy that meet the most demanding applications both in and out of the laboratory and shares many features with the Rudolph Research Refractometer Product Line.
Using water or NIST traceable fluids. Factory Default calibration can always be reset.
Operating Dimensions
L: 17 1/4″ W: 12″ H: 13″ / 23 lbs. L: 43.5 cm W: 30.5 cm H: 33 cm / 10.4 kg
Shipping Dimensions
L: 27″ W: 21″ H: 17″ / 30 lbs. L: 68.58 cm W: 52 cm H: 43.18 cm / 13.6 kg
Power Requirements
100-240 volts, 50 Hz – 60 Hz
Rudolph J157
Unique Features and Capabilities to meet your Application
Operating the J157 PLUS is as simple as placing a sample on the prism, closing the cover and reading the answer – all in just a few seconds. There are no shadow lines to match and there is no eyepiece requiring any type of operator determination or manual adjustment as necessary with ABBE type refractometers. When the “measure when stable mode” is selected, the J157 automatically waits until the sample has been electronically heated or cooled to a predefined temperature before initiating a measurement.
Unlike other temperature-controlled refractometers, the J157 PLUS has electronic temperature control from both above and below the sample.
The sample cover is controlled to the same temperature as the prism and, when lowered, is designed to provide a temperature controlled micro-environment that provides unrivaled temperature stability, fast measurement time and minimal evaporation. Depending on options, the sample cover can also be used to initiate an automatic measurement.
The J157 PLUS digital refractometer 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 thereby greatly reducing evaporation and at the same time helping to evenly spread many types of materials including semi solids, and pastes over the measurement prism. This feature offers improved measurement performance on many samples.
The Rudolph Auto Measure Option allows the closing and opening of the presser to start and end a measurement. The operator just closes the cover to start measuring and lifts the cover to stop measuring. The closing and lifting of the lid functions as the start/stop in the measurement process without ever touching the measure button.
No matter how great the refractometer is, accurate results will only be obtained if the prism is clean. All Rudolph J Series refractometers offer a flat, easy-to-clean prism that makes the cleaning process between measurements simple, even with sticky samples.
The J157 PLUS digital refractometer can be supplied with a large range of standard and customized scales. Scales can be customized in a few minutes. Simply enter 2, 6 or 10 points of concentration vs. corresponding RI data. The instrument calculates the custom scale automatically.
The J157 PLUS Digital Refractometer 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. Regardless of how many times the refractometer has been calibrated, it can always be restored to the initial factory calibration if required.
Versatile laboratory instruments have the advantage of being able to display significant amounts of information. However this versatility can also lead to confusion, with extra buttons and by forcing operators to interpret extra results. These extra results that have no relevance to their application. Above all, the Rudolph J Series customizable display allows the refractometer to be configured to exactly what is required for each application.
The customizable digital keypad can be “locked out” or just a few keys can be operable. For example, the measure key, print key, zero key, customer specified sample keys or any combination thereof. In addition, the lockout function, calibration and other functions are all password protected.
The J series refractometers offer a sapphire prism for high mechanical and chemical durability. The sample well is made of acid resistant 316 stainless steel with a Techtron sealing ring. Most importantly, there is no lamp to change, the LED light source is guaranteed for 1,000,000 measurements.
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.
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.
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