Research Respirometer
Aerobic/Anaerobic
The AER-208 Research Respirometer is designed for detailed
laboratory studies in aerobic and anaerobic respiration.
Soil / Compost
Research Respirometer
Aerobic/Anaerobic
The AER-208S Research Respirometer utilizes eight specially
designed reaction chambers, for use with solids, such as,
soil, compost or plastics in biodegradability studies.
The Quick Scan BOD Analyzer is designed to meet the needs
of treatment plant operators desiring fast, easy screening
of wastewater samples.
Quick Scan BOD
Analyzer
Creating Innovative Technology Solutions for a Better World for 21 Years
Quick Scan
Soil / Compost
Analyzer
Biomethane
Potential Analyzer
Digital Gas Flow
Meter
Online Oxygen
Demand Monitor
Magnetic Stirrers
Respirometers
The Quick Scan Soil / Compost Analyzer utilizes four specially
designed reaction chambers, for use with solids, such as,
soil, compost or plastics in biodegradability studies.  
The MPA-200 monitors the production of biogas in bench scale
reactors, for precision optimizing of gas production, for evaluation of
environmental and chemical adjustments.
The DFM-502 Digital Gas Flow Meter is a two channel flow meter
with digital displays, that is designed to replace wet test meters
and similar low-flow devices.  
The ODM-100 Online Oxygen Demand Monitor is a portable unit
for measuring real-time oxygen demand at any point in a
wastewater treatment process.
The MS-304 and MS-308 Magnetic Stirrers are the highest quality
four and eight position magnetic stirrers available.
Soil / Compost Research Respirometer
Support Equipment
  • Temperature Control options include four and eight
    position water baths and water bath heating/cooling
    recirculators.

  • Additional Reaction Vessels, including 125mL, 250mL,
    500mL, 1000mL bottles and Soil / Compost Reaction
    Chambers.

  • In-line CO2 traps.
Respirometer
Supplies
Replacement tubing, needles, stir bars, fittings, cell oil, and
other miscellaneous supplies.
Respirometry
Technical Papers
Research Respirometer
Quick Scan BOD Analyzer
Quick Scan Soil / Compost Analyzer
Digital Flow Meter
Online Oxygen Demand Monitor
Respirometer Supplies
Magnetic Stirrer
Methane Potential Analyzer
Challenge Technology
2270 Worth Lane, Suite D
Springdale, Arkansas  72764 U.S.A.
PH:  479-927-1008;
FX:  479-927-1000
www.challenge-sys.com
Respirometry – From Research Tool to
Online Process Control

Respirometry can quite literally be derived as a
general term that encompasses a number of
techniques for obtaining estimates of the rates of
metabolism of vertebrates, invertebrates, plants,
tissues, cells or microorganisms.

It has been used as a technique in the wastewater
industry since the 1950’s and was originally seen
as an instrumental alternative to the BOD test
(which was limited to manual titrations at the time.)  
The test has developed significantly since then and
is now used today as a technique to measure the
kinetics of wastewater treatment, oxygen utilization
rates, the impact of toxic shock events and process
control.

Respirometers are based on the principle that what
is measured is the rate at which the biomass
consumes dissolved oxygen. This rate is
measured either directly, measuring the dissolved
oxygen concentration in the liquid phase, or by
measuring the gaseous oxygen concentration
either by paramagnetics, or by measuring the
changes in gaseous oxygen concentration using
manometric or volumetric techniques.

When you look at the benefits of measuring with
respirometry, the usefulness of the technique, in
providing a measure of the health of the biomass,
is a very powerful technique that gives a complete
picture of how the biological system is operating.
The respirometry methods and equipment have
come a long way from the flask and U tube
manometer, to the computer controlled systems
available today.  Respirometry is a valuable tool in
understanding and optimizing biological
processes, but like most tools, requires some
experience to realize its true value.  As scientists
and engineers continue to explore new ways to use
these tools, Challenge Technology will strive to
provide them with the state of the art equipment to
process better quality water more efficiently.
Your Success
Challenge Technology is the world leader in
manufacturing and support of respirometric
measuring equipment.  For over 21 years,
Challenge Technology has provided the
highest quality respirometers available for
testing in wastewater treatment and other
fields, which use respirometry to gain an
understanding of biological processes with
respirometric evaluation.  When you choose
a Challenge Technology Respirometer
System, you also get the benefits of our 21
plus years of experience, supporting our
customers and working with them to insure
their success.
Call our technical staff
with your questions
about respirometry -
479-466-6672
Respirometer Types
Comparison Chart
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Challenge Technology
International
Sales Representatives
Download Research
Respirometer Brochure PDF
Download Soil / Compost
Research Respirometer
Brochure PDF
Download Quick Scan BOD
Analyzer Brochure PDF
Download Quick Scan
Soil / Compost Analyzer
Brochure PDF
Download Methane Potential
Analyzer Brochure PDF
Download Digital Flow Meter
Brochure PDF
Download Online Oxygen
Demand Monitor Brochure PDF
Download Magnetic Stirrers
Brochure PDF
Number one respirometer
system for over 21 years