Exclusive TempTrol™
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Refractometer Selection, Application and Feature Guide Rudolph Research Analytical serving its customers with Integrity, Quality, and Innovation for over 50 years. See website for how above accreditations and warranty certifications apply

Exclusive TempTrol™ Dual Temperature Control System The J457 has the widest temperature range The J457optics with the remote display has the best air circulation of any model in the Rudolph range allowing the widest temperature setting and the fastest stabilization times. Great for applications where the measurement temperature is near ambient. Temperature control is provided only from below the sample. For most samples 10° from ambient select J Series standard temperature controlled sample cover (CC option) For semi-solid and highly evaporative samples more than 10° from ambient select a...

You are in Menu > Calibration > Validation Set a standard, measure it over time. The J457 has the ability to set up prompted validations and provide a graph of that validation over time. The range can be programmed by the laboratory allowing a lab to set limits as defined by USP<831> or ISO or any other standard. Live Reading : 1.33299 Expected Current Temp : 20.00° C Allowable Result Variation Allowable Variation Performance You are in Menu > Calibration > Performance Measurements Validation Graph for Water You are in Menu > Calibration >Last 30 Days Performance Today Last 7 Days...

Chemical Concentration Measurement 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. Reasons to Choose Rudolph • Chemical...

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 Reasons to 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...

Pharmaceutical Description Pharmaceutical measurement demands meeting the required standard, for example USP<831>, EP2.2.6 and similar. There is no “good enough” in pharma, additives and formulations must meet USP requirements. Documentation is also key, simply generating a number is not enough. The laboratory has to be able to prove calibration and, when it is operating under 21 CFR 11; document who did the measurement and create an audit trail showing every interaction with the instrument. Additionally, the operating software and data security has to be proven to work by an IQOQPQ before...

Petroleum Description The petroleum industry is standardized through ASTM methods, and the key is having a refractometer that meets the specifications of ASTM.. For Refractive Index(RI) measurements this mostly means ASTM D1218 and D1747. Compliance with D1218 is for measurement at temperatures between 20°C and 30°C and is mostly used for light hydrocarbons. D1747 is for measurements up to 100°C and is often used for crude oils and other process streams. ASTM is very strict with temperature as these types of samples generally have a very much larger dn/dt value than the water / sugar...

Flavor and Fragrances Description Flavor and fragrance materials are traded worldwide. Essential oils are distilled from plants in some of the most remote corners of the globe. Innovation laboratories make analogues of traditional flavors or even whole new materials. The two most common specifications in certificates of analysis are Specific Gravity(SG) (density) and Refractive Index(RI). Reasons to Choose Rudolph • Wide range of 1.26 RI to 1.70 RI allows measurement of all currently approved compounds. • Built in temperature control provides more accurate results than relying on...

Biological Fluid Analysis Description Samples are sometimes very difficult to obtain, and the refractometer test is a “non-destructive” test on a very small volume of sample. . 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...

Sugar 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. Reasons to Choose Rudolph • Very easy to operate for rotating seasonal staff. • Temperature control allows the instrument to be calibrated with traceable...

Combined Systems Description A refractometer is a very useful analysis tool. It’s very fast, tolerant of difficult matrices and can provide a lot of useful information with a very low investment in both capital and training. It is still only one number though and so is limited when a sample is not a binary solution. Combining a refractometer and a density meter or another instrument adds value not otherwise achieved with a single measurement metric. Combining adds new constituents not otherwise obtained by a single system and also saves time and streamlines reporting. Reasons to Choose...