CHALLENGE TECHNOLOGY is the world leader in the design and manufacturing of precision respirometers that support wastewater, BMP testing, biofuel & bioremediation research. With the introduction of the NEW 800 SERIES, Challenge Technology leads the industry with the most complete line of respirometers to fit every application and budget. The New Methane Potential Analyzer, BPA-800 is ideal for methane optimization studies and the AER-800 is a must for anyone involved in the testing of wastewater . And for WasteWater Treatment Plants Challenge offers the ODM-100 for on line, real time oxygen uptake monitoring of biological activity.