AER-200 Respirometer

The AER-200 Respirometer can be used for both aerobic and anaerobic wastewater applications. The AER-200 Respirometer is designed for batch and laboratory applications. When you use the AER-200 Respirometer, here's what you get: The widest range of oxygen uptake rate measures...as low as 0.06 mg/hr and as high as 600 mg/hr...wide enough to meet any of your applications. The widest range of detection for anaerobic gas production ... from 0.05 ml/hr to 1,500 ml/hr. Highly accurate flow measurement...you can "trust" the data you generate. Easy data collection...the computer does the work. the data can be used directly or exported to your spreadsheet or other data processing programs. Data collection flexibility...intervals can be set from 1 minute to 720 minutes to meet your needs You know exactly where you are in each test from on-screen tabular and graphical indications of the test progress...no more guessing on your part. An easy-to-set up respirometer system...modular design allows you to use only the components to meet your needs. Flexibility...you can use reactor volumes ranging from less than 50 ml to 20 l or larger. More flexibility...you can use different reactor configurations during any test set up. And more flexibility...you can run aerobic and anerobic tests simultaneously on one system. An easy-to-use respirometer system...you minimize set up time by using standard laboratory glassware...you reduce cleanup time because grease is not required to seal the reaction vessels...you can withdraw gas or liquid samples from the reaction vessels at any time during a test. User Friendly Software...WindowsTM-based software presents data as cumulative oxygen uptake and oxygen uptake rate when operating in the aerobic mode and cumulative gas production and gas production rate when operating in the anaerobic mode. Training to use the system is easy...almost anyone can do it.

AER-200S Soil-Compost Respirometer

The Challenge AER-200S Soil/Compost Respirometer is ideally suited to determine rates of oxygen uptake or anoxic gas production rates in soil or compost samples - as may occur in upper layers of soil under natural conditions or in mixed compost reactors. The AER-200S Soil/Compost Respirometer can provide useful information for determining steps in soil bio-remediation. Many companies are developing products that assist or increase the degradation rate of toxic chemicals. This unit can provide quick and easy quantitative data to support such claims. This unit can also help municipal and industrial sites that need to understand the gas production rates of the dried solids. This objective is accomplished with a perforated sample column in a sealed reactor column. Soil Column Specifications Soil, Compost, and Bio-Solid testing equipment must overcome two important principals: Stagnant air gradients and temperature control. Challenge created a convenient two chamber system to do just that. Reactor Column: The reactor chamber allows for a headspace around the entire sample and allows for maximum surface area resulting in maximum oxygen uptake rates. Sample Column: The sample column serves three major functions. The base of the sample column is a unique magnetic coupled fan that works in conjunction with the MS-300 Magnetic Stirrer. This feature allows the air to be circulated in and around the sample without injecting or removing air from the reactor eliminating stagnant atmosphere gradients.The sample column is a perforated cylinder that allows for maximum surface-to-reactor contact. The sample column cap functions as the KOH well for carbon dioxide absorption for measurements or anaerobic measurements when methane values are required. Click here for the AR-295 Diagram. The AER-200S uses easy and reliable luer fittings for all connections. The need for messy greases and special configurations are eliminated. This system can measure aerobic and anaerobic reactions very easily by changing the position of two connections at the measuring cell. The reactor column has two ports purging the head space. Stirring speeds are unified across all samples with a single control dial. Temperature control is critical for any respirometric study, so Challenge Technology recommends the use of either a temperature controlled environmental chamber or a heater/cooler and water bath such as the H/C-230 and W/C-200. The W/C-200 sits on the stirrer base without compromising magnetic stirring efficiency. The H/C-230 is then used to circulate the water throughout the entire bath to maintain consistent and stable temperatures. Challenge recommends a circulating heating/cooling unit for uniform temperature as opposed to immersion heaters that can produce pockets of differing temperatures. The AER-200S is available in a 4-Reactor set and 8-Reactor Set. For individuals already owning the AER-200 Respirometer, the Soil/Compost Column can be ordered individually (AR-295). For more information about the measuring system and capabilities see the AER-200 Aerobic/Anaerobic Respirometer

MS-300 Magnetic Stirrer

A key component to respirometric testing is the oxygen transfer limit. So, Challenge Technology experimented with many stirrers, but found that all the stirring units available could not reach the high speeds required without the risk of spin-off and possibly nullifying an entire test. So, Challenge set out to create the best multi-position stirrer available.

OLR-300 On-Line Respirometer

The OLR-300 On-Line Respirometer is a true "on-line" respirometer which gives oxygen uptake rates for treatment plant operations.