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Rudolph Research Analytical

Name: Rudolph Research Analytical
Address: 55 Newburgh Road, Hackettstown, NJ, 07840, US
Telephone: +19735841558

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Rudolph Research Analytical

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Rudolph Research Analytical is a global Manufacturer of Refractometers, Polarimeters, Saccharimeters, Density Meters, and Automation Solutions Consequently, Mr.

The company was founded in 1930 by Otto Curt Rudolph, who imported microscopes, polarimeters, saccharimeters, and other scientific instrumentation manufactured in Europe. Scientific instrument importation was not possible after the outbreak of World War II. Rudolph began to manufacture a standard line of polarimeters, and undertook the custom design and manufacture of instrumentation for universities and laboratories. Since that time, the company has been engaged in research, design, manufacture, sales and service of products utilizing light as a measurement medium. In 1970, the company changed its name from O.C. Rudolph & Sons, Inc. to Rudolph Research Corporation. The name was changed to reflect the modern and innovative philosophies of the company. Rudolph Research began expanding its products to include a standard line of automatic ellipsometers, polarimeters and saccharimeters, as well as accessories for those instruments. Various models of these instruments are used in pure and applied research by universities, independent laboratories, government laboratories and industry. In addition, Rudolph Research production ellipsometers find widespread application in the semiconductor/integrated circuit industry where the measurement of film thickness in the angstrom region is important. Automatic polarimeters are used for research and process control in the pharmaceutical, food and beverage, chemical and related industries. Automatic saccharimeters are used routinely by sugar growers, processors, and refineries, as well as by governments to regulate both domestic and international sugar trade.

$When Measuring Contact Lenses, Even a Little Pressure Can Make a Difference.Measuring the refractive index of a soft con...$

10/22/2026

When Measuring Contact Lenses, Even a Little Pressure Can Make a Difference.

Measuring the refractive index of a soft contact lens presents a unique challenge. Apply too much pressure, and solution can be squeezed out of the lens material, potentially changing the refractive index being measured.

That makes controlling pressure an important part of achieving consistent, reproducible results.

Rudolph Research Analytical's J457CLR Contact Lens Refractometer is designed specifically to address this challenge.
Its adjustable weight system allows laboratories to apply a light, repeatable amount of pressure, while a soft positioning mechanism gently lowers the lens into place to help minimize compression.

The J457CLR also incorporates specialized Minimum Illumination Optics (MIO), providing a smaller measuring spot for applications where the contact lens and surrounding saline have different refractive indices.

The result is a measurement system designed to help laboratories improve reproducibility when testing both soft and hard contact lenses.

Because when you're measuring something as delicate as a contact lens, how you make the measurement matters just as much as the measurement itself.

Learn more at www.rudolphresearch.com

10/21/2026

What Should Audit-Ready Polarimeter Documentation Include?

For regulatory affairs and quality compliance teams, selecting the right polarimeter is about more than measurement performance. It’s also about ensuring the instrument is supported by the documentation needed to demonstrate compliance, maintain data integrity, and prepare for audits.

When evaluating polarimeter systems for regulatory audit readiness, here are five essential documentation areas to review:

• Installation Qualification (IQ): Records confirming that the instrument has been installed according to manufacturer specifications and site requirements.

• Operational Qualification (OQ): Documented evidence that the instrument operates as intended under defined conditions.

• Performance Qualification (PQ): Records demonstrating that the system performs consistently under actual or representative operating conditions, as applicable to your procedures.

• Calibration and Validation Records: Supporting documentation for calibration, measurement accuracy, and applicable validation activities to help establish confidence in analytical results.

• Traceability and Compliance Documentation: Instrument identification, service history, maintenance records, software documentation where applicable, and other supporting records that help maintain a complete audit trail.

Why does this matter?
A thorough polarimeter evaluation considers both analytical capabilities and the documentation available to support your quality system. Having the right records accessible can help regulatory affairs teams streamline audit preparation, support internal reviews, and strengthen instrument lifecycle management.

At Rudolph Research Analytical, we understand the importance of reliable analytical measurements and documentation support in regulated laboratory environments.
Looking for a polarimeter system that aligns with your laboratory’s qualification and compliance documentation needs? Make documentation readiness part of your evaluation from day one.

10/12/2026

The Gulf Coast Conference starts tomorrow! 🎉

A quick reminder that Rudolph Research Analytical will be attending the 2026 Gulf Coast Conference in Galveston, Texas, October 13–14!

If you’re attending, be sure to stop by Booth #521 to connect with our team and learn more about our analytical instrumentation and solutions for reliable, accurate laboratory measurements.

📍 Moody Gardens Convention Center | Galveston, TX
📅 October 13–14, 2026
📌 Booth #521

We look forward to connecting with fellow industry professionals and seeing you at the show!

10/09/2026

What makes proof testing single barrel bourbon different?

Every barrel tells a different story. Age, warehouse location, barrel characteristics, and extraction can all influence the final spirit — and they can also introduce challenges for accurate alcohol measurement.

One factor that deserves particular attention is obscuration: dissolved solids from barrel extractives can affect density measurements and cause apparent proof to differ from the true alcohol content.

For bourbon producers, understanding this effect is important for:
• Accurate %ABV measurement
• Label compliance
• Quality control
• Efficient laboratory workflows
• Minimizing sample loss and unnecessary processing

Our white paper, “Bourbon Proof Testing for Single Barrel and Blended Bourbons,” takes a closer look at the analytical challenges involved and examines approaches for measuring obscured spirits.

The paper covers:
• TTB requirements for bourbon proof testing
• How dissolved solids and barrel extractives contribute to obscuration
• Traditional evaporation and distillation methods
• The use of density and refractive index measurements to address obscuration
• How the Rudolph AlcoTest-RI® can provide corrected %ABV and estimated obscuration
• The potential to reduce testing time from hours to minutes for applicable samples
• Validation and QC considerations for single barrel programs

For laboratories and distilleries working with increasingly complex spirit samples, the way alcohol content is measured can be just as important as the measurement itself.

Read the full white paper to learn more about the science behind bourbon proof testing and the challenges of measuring alcohol in single barrel and blended bourbons:

https://rudolphresearch.com/bourbon-proof-testing-for-single-barrel-and-blended-bourbons/

10/06/2026

Rudolph Research Analytical is headed to the Gulf Coast Conference!

Join us in Galveston, Texas, at the 2026 Gulf Coast Conference, where analytical professionals come together to explore the latest instrumentation, applications, and technologies supporting petroleum, petrochemical, chemical, and laboratory testing.

Stop by the Rudolph Research Analytical booth to meet our team and learn how our instrumentation can support accurate, reliable measurement in demanding laboratory environments.

📍 Moody Gardens Convention Center — Galveston, TX
📅 October 13–14, 2026
📌 Booth #521

We look forward to seeing you in Galveston!

09/25/2026

What happens when sample viscosity changes the measurement?

For density measurements, viscosity can introduce an additional source of error. That is why the measurement technology inside a density meter matters.

The Rudolph Research Analytical DDM series density meters feature an oscillating U-tube with full-range viscosity correction and a reference oscillator. This technology is designed to maintain measurement performance across the instrument’s viscosity range while supporting long-term calibration stability.

The result is a density measurement system designed to handle samples with varying viscosity without requiring a separate calibration for every measurement temperature.

For laboratories working with chemical, petroleum, pharmaceutical, beverage, and other challenging samples, that means greater confidence in density and specific gravity measurements across a broad range of applications.

It is a feature that may not be immediately visible from the outside of the instrument, but it plays an important role in what happens inside the measurement cell.

$Looking for a smarter way to integrate refractive index measurements into your lab’s workflow? The Rudolph Research Anal...$

09/17/2026

Looking for a smarter way to integrate refractive index measurements into your lab’s workflow?

The Rudolph Research Analytical J457 Refractometer offers a Computer Bridge option that allows you to connect your instrument with a computer for streamlined data transfer and workflow integration.

With the Computer Bridge, you can:
1. Connect your J457 directly to a computer
2. Transfer measurement data for easier recordkeeping and analysis
3. Integrate instrument data into your existing laboratory workflow
4. Reduce manual data entry and improve efficiency
5. Make your refractive index measurements easier to manage and document

Whether you're focused on quality control, research, or routine laboratory testing, the Computer Bridge option can help make your J457 measurements more connected to the rest of your digital workflow.

09/09/2026

Rudolph Research Analytical will be attending the Society of Forensic Toxicologists (SOFT-TIAFT joint meeting) in Chicago, IL, September 19-24.

We’re looking forward to connecting with forensic professionals, laboratory experts, and industry colleagues to share ideas, explore the latest developments in analytical technology, and discuss how Rudolph Research Analytical can support your laboratory needs.

If you’ll be attending, be sure to stop by and visit us at booth #720. We’d love to meet you and learn more about the work you’re doing in the forensic community.

08/27/2026

In food and beverage applications, some samples can be thick or viscous enough to create challenges during measurement. When these samples cool, their viscosity can increase, potentially leading to buildup or clogging within the sample path.

Rudolph Research Analytical’s heated interface option for density meters helps maintain the sample at a controlled temperature as it enters the instrument. This can be particularly useful when working with products such as syrups, concentrates, sauces, oils, and other temperature-sensitive or viscous samples.

Maintaining the appropriate sample temperature can help improve sample flow through the system and reduce the risk of clogs during analysis. It also helps keep measurement conditions consistent, which can contribute to more accurate, faster, and repeatable density results.

Click here to learn more: https://rudolphresearch.com/density-meter/

08/21/2026

Rudolph Research Analytical instruments are built to last and their customer support, for these legacy instruments, should be too.

Models manufactured decades ago, are still being used in laboratories today. The Rudolph Service & Sales team are still providing application and sales support for these legacy systems.

Standing behind legacy instruments, doesn’t mean standing still. Rudolph continues to innovate and offer advancements in software and hardware while still producing the same high quality products and accessories that we are known for, together with market leading accreditation to ISO 9001, ISO 17025 and ISO 17034.

Over the years, we’ve listened to our customers, learned from the industries we serve, improved our technology, expanded our capabilities, and continued to innovate. Today’s Rudolph Research Analytical instrumentation reflect decades of experience in precision measurement, software, automation, compliance, and laboratory workflow.

Whether you’re keeping a trusted legacy instrument running or considering what the next generation Model can do to improve efficiency, compliance or ease of use, our commitment remains the same:

100% Customer Satisfaction over the instrument's useful life.

Learn more about Rudolph Service + Maintenance:
https://rudolphresearch.com/resources/service/

Address

55 Newburgh Road
Hackettstown, NJ
07840

Opening Hours

Monday	8am - 5pm
Tuesday	8am - 5pm
Wednesday	8am - 5pm
Thursday	8am - 5pm
Friday	8am - 5pm

Telephone

+19735841558

Website

http://www.rudolphresearch.com/

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