Curtiss Wright Nuclear
Challenge Environmental Systems
700 W. 20th, PO Box 3671 
Fayetteville AR Arkansas
United States 72702
Phone: +1 978 440 9988, Fax: +1 818 985 3833
Challenge Technology - Leader in Civil Engineering Research Equipment Challenge provides respirometers for variety of scientific applications. The AER-200 aerobic/anaerobic system is useful in the study of gases such as Hydrogen, Methane, Co2 and others. The system was developed specifically for the measurement of Oxygen uptake in wastewater sample testing but has been found to be an excellent choice for any type of aerobic or anaerobic study. The AER-200 Respirometer is the most flexible system on the market able to grow with your needs from 8 to 16 and up to 24 reactors being monitored through one computer system. The AER-200 is able to accommodate from 125ml up to 1 liter reactors. Challenge also offers the AR-295 Soil/Compost Columns for study of solids, these are designed specifically for use with the Challenge Rare Earth magnetic stirring base, water bath and temperature control system. Challenge is a world leader in the design and application of respirometers for a wide range of applications. Respirometers AR-502F FLO-CELL TM Gas Flow Meter MS-300 Magnetic Stirrer NEW! Materials Division Challenge Environmental Respirometers are field-proven. There are over 200 units currently in use around the world . Learn about the company that's been leading the way in respirometer technology for 15 years. Come see us at the WEFTEC trade show in San Diego, October 13-17. Look for Booth 5733 Testimonials "We have found the performance of the system to be quite satisfying and user friendly. We are currently running low level O2 uptake experiments and are impressed with the sensitivity of the instrument." Wendy Segal Research Technician BetzDearborn Division of Hercules, Inc. Trevose, PA "I have found the performance of the Challenge AER-200 to be unmatched. The precise measurement of oxygen consumption, homogenous mass transfer of test materials, and constant and consistent operating temperature have enabled me to obtain extremely accurate test results, particularly as compared to other respirometer systems. I find the C
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