For high throughput, high accuracy applications Refractometer Selection Guide Meeting the needs of your industry and application • • • • • • Food and Beverage Sugar Milling, Refining, Processing Chemical Pharmaceutical and Toxicology Testing Petroleum Flavor, Fragrance, Cosmetics Rudolph Research Analytical, serving its customers with Integrity, Quality, and Innovation for over fifty years.

A Refractometer that’s right for your industry and application Every industry has its unique application requirements, environmental constraints and operator handling issues with which to contend. It is for this reason, that Rudolph has more than 10 different model variations to ensure that we have the right solution for your situation. Maybe you are a pharmaceutical company looking for an instrument which can measure below the standard food refractometer range of 1.33 - 1.53 to comply with the USP monograph for Sevoflurane (refractive index range of 1.2745 - 1.2760) or other halogenated ethers...

Below are a few of the reasons customers replaced their old refractometer with a J-Series from Rudolph You are tired of arguments over shadowline interpretation on your Abbe Refractometer. One person says the material is on specification, one person says it’s not. In addition, scratches on the glass prism make visual interpretation even more difficult. J-Series Internal Reflection Refractometers use scratch proof artificial sapphire prisms that measure the reflected light not the transmitted light, like the Abbe, so dark samples measure as easily as clear samples. Just put a drop of sample on...

Seed oils Soy bean oils Candy Syrups Dairy products Edible oils Coffee extracts HFCS Juices Juice concentrates Fruit products Confections Starch Milk Hydrolysis products Vegetable products Teas Sodas Sauces Soups Jams Jellies Soft drinks Feature Highlight Flat, easy to clean prism – No matter how good the refractometer is, the results will only be right if the instrument is clean. Rudolph’s flat prism design makes cleaning easy, even with sticky syrups. The flat low profile sample well with a sample volume of less than 1ml is easily cleaned by wiping with a common paper towel. The J57 single...

Sugar Milling, Refining, Processing • • • • • • • Cane sugar milling and refining Beet sugar milling and refining Invert sugar Liquid sugar Confectionary sugar Molasses Brown sugar Feature Highlight Pour through refractometers are designed for measuring cane or beet juice in a sugar mill. This design has two important benefits: cleaning becomes part of the sample loading process and measurement time is reduced because one sample is poured in after another making the design attractive for seasonal operators. The small funnel design forces improved sample flushing by increasing the number of sample...

Chemical Water Based: • Resins • • Polymers • • Coolants • • Gels • Glues Glycols Ethylene Acids 6 Petroleum Based: • Oil based paints • Fine chemicals • Fluranes • PET: polyethylene terephthalate Polymers Resins Solvents Plastics J257-CP-H Feature Highlight All J Series refractometers are designed for high chemical resistance from the outset with the wetted parts being sapphire, Tectron® and 316 stainless steel. However, when using HCl and other caustic compounds, 316 stainless steel is not resistant enough. For these applications Rudolph offers an extended chemical resistance option where the...

Pharmaceutical and Toxicology Testing • Total Parenteral Nutrition (TPN) • Toxicology testing (Urine SG) • Pharmacy compounding and drug diversion Feature Highlight Specifications • Measurement Range: 1.26 - 1.70 RI; 0 - 95% Brix • Measurement Range: 1.26 - 1.70 RI; 0 - 95% Brix Specifications • Measurement Range: 1.33 - 1.53 RI; 0 - 95% Brix, 1.000 - 1.0500 Urine SG • Accuracy: 0.0002 Urine SG; ±0.00002 RI, ±0.02 Brix • Electronic Temperature Control: Fixed temperature selection: 20°C and 25°C • Measurement Range: 1.33 - 1.53 RI; 0 - 95% Brix, 1.000 - 1.0500 Urine SG • Accuracy: 0.0002 Urine...

ASTM D1218 ASTM D5006 Fuels Waxes 8 • ASTM D1747 • Oils • Lubricants Feature Highlight The Temperature Boost (TB) option provides two benefits: The Rudolph Research Analytical J357 is able to control temperature to 100°C because it has a unique dual temperature control system where heat is applied to both sides of the sample. 1. The maximum temperature of the refractometer is increased from 100°C to 110°C. However, there are still applications where temperatures above 100°C are needed. To accommodate the need to measure above 100ºC, the Temperature Boost (TB) option was developed for the J357...

Flavor, Fragrance, Cosmetics • • • • • Perfumes Skin cleansers Lotions Lemon, lime, orange Palm Cremes Waxes Natural oils Sandalwood Feature Highlight YOUR CUSTOM BOTTLES AND RACK HERE Automation Flexibility • Rudolph’s AutoSampler can be loaded with up to 240 samples • Combine Refractive Index measurements with a polarimeter, density meter, and colorimeter for simultaneous measurements of: – Density/Specific Gravity – Color – Optical Rotation/Specific Rotation – Refractive Index • Up to three different rinse solvents available for use; fully programmable • Emergency samples measured at any time...

Model Comparison Chart: Standard Food Refractive Index Range Applications Measurement Range Measurement Scales 1.33 - 1.53 RI, 0 - 95% Brix, 1.0000 - 1.0400 Urine SG Refractive Index (RI) Brix (% sucrose), Temperature Corrected Brix, Temperature Corrected RI, Urine SG Refractive Index (RI) Brix (% sucrose), Temperature Corrected Brix, Temperature Corrected RI, Urine SG and 100 User Programmable Scales Control Temperature Ambient Temperature Limit Sample Temperature Limit Temperature Correction Range 589.3nm (other wavelengths available) Light Source Light Emitting Diode (exp life>1,000,000 measurements)...