Parr Instrument Company Blog

“Makers on the Move” Tour Visits Parr

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Parr Instrument Company is honored to be part of the Illinois Manufacturers’ Association and IMEC’s Makers on the Move tour for Manufacturing Month. Mark Denzler with IMA, David Boulay with IMEC, State Senator Michael Halpin, Representative Gregg Johnson, Representative Dan Swanson, LaDrina Wilson from the Quad Cities Chamber of Commerce, Parr’s President & CEO Jim Nelson, & Parr’s Machine Shop Supervisor Nate Brown all spoke about the importance of manufacturing to businesses and our community.

Jim Nelson and Parr’s Operations Manager, Stacey Moon led the group on a tour of Parr’s facility while providing an overview of Parr’s products and its 124-year history. Guests were able to see Parr’s skilled machinists and manufacturing team at work creating high-quality Parr reactors, pressure vessels, and calorimeters.

Looking for a job in manufacturing? Join Parr’s amazing team!

Parr Voted Best Manufacturer!

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Parr would like to thank the Quad Cities Regional Business Journal and their readers for voting us the Best Manufacturer for 2023!
At Parr we pride ourselves on designing and manufacturing safe, high quality laboratory equipment.

Join us at ACS Spring 2023!

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Join us at ACS Spring 2023 in Booth #618!
Indianapolis, IN | March 26-30

Featuring Parr’s High Pressure Instruments for Sustainable Research!

Get your Free Expo Only Pass to ACS Spring 2023!

Visit us at the AMPP Annual Conference + Expo!

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Come see Parr’s new High Pressure, High Temperature Rotating Cylinder Electrode at AMPP 2023, March 19 – 23 in Denver!

Contact us for a Free One-Day Exhibit Hall Pass!

Standard vs. Custom Multiple Reactor Systems

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Parr Instrument Company designs and builds both standard and custom parallel & multiple reactor systems for use in many industrial and academic laboratories for any number of processes that require elevated temperature and pressure.

Our standard systems include the popular Series 5000 Multiple Reactor System with six 45 mL or 75 mL reactors and our new Series 2500 Micro Batch System with three 5 mL or 10 mL vessel sizes. Any of our stirred reactor series can be combined in parallel to create custom parallel reactor systems.

Learn more.

Four Station Multiple Reactor
Four Station Multiple Reactor

Parr Fluidized Bed Reactors for Solids Processing

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Fluidized Bed ReactorThere are many applications and configurations for which fluidized bed reactors have been successfully deployed in industry. The core element of a fluidized bed is the upward flow of a fluid (usually gas) through a bed of solids at a high enough flow rate to suspend or fluidize the particles in the fluid but not so high that they are transported out of the reactor. This leads to increased interaction between solids and fluid and decreased interaction of solids with each other and the wall. It also makes it easier to recover and/or recycle the bulk solids from the reactor.

These characteristics give fluidized bed reactor systems advantages over other types of reactors for some applications, despite the increase in complexity compared to fixed bed reactors.

Learn more.

Parr Oxygen Combustion Bomb Calorimeter Selection

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There are a number of factors that can influence your choice for oxygen combustion bomb calorimetry. Precision, workload, and type of analysis will all make a difference in choosing the best model for your research needs.

We explain these factors and more in our newly updated Technical Note No. 105: Calorimeter Selection Guide. Download Parr’s Calorimeter Selection Guide (must be registered/logged in to access) to learn more or contact us for personalized help in selecting your calorimeter!

New Automated Liquid Sampler Video

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Check out our new video featuring our 4878 Automated Liquid Sampler!

Collect multiple samples at user-defined intervals from any Parr reactor or pressure vessel while at operating temperature and pressures up to 5,000 psi and 500 ˚C.

Learn more!

New HP/HT Rotating Cylinder Electrode System

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Parr's new High Pressure, High Temperature Rotating Cylinder Electrode (RCE) System was designed to perform corrosion studies as described in ASTM G185 at elevated pressure and temperature. This apparatus facilitates the evaluation of corrosion inhibitors in harsh, real world conditions, up to 200bar/2900psi and 200°C, with or without the presence of CO2 and/or H2S.
Parr’s new system is based on its popular 1 liter stirred reactor design and integrates robust counter and reference electrodes from Corr Instruments with dedicated sequencing software to control Gamry’s 1010B Potentiostat as well as Parr’s temperature and motor controller.

Learn more!

Parr HP/HT RCE System
Parr HP/HT RCE System

Hydrometallurgical Applications: Acid and Caustic Leaching of Ores

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Parr stirred reactors are widely used in hydrometallurgical applications where acid leaching of ores is the preferred method to extract metal ions. A widespread example of this technology is the acid leaching of nickel ions from laterite ores, a first step in the path to the production of stainless steel.
To minimize vessel corrosion by the aggressive sulfuric and hydrochloric acids used in this process, vessels are most commonly constructed of titanium.
However, not all extractions are done with acids. Aluminum, for example, is extracted from bauxite ores with the use of caustic solutions where the preferred material of construction for the vessel is Inconel or Monel.
To learn more about the use of Parr pressure vessels for acid or caustic leaching of metallic ores, please see