MOXUS Metabolic Cart
Using Legendary CD-3A & S-3A Gas Analyzers
The Standard for Respiratory Gas Measurement for over 45 years
- S-3A/I Oxygen Analyzer
- CD-3A Carbon Dioxide Analyzer
- Pneumotach Breath Volume Measurement System
- Sample Pump and Flow Controller
- Windows Software and Interface Package
- 2 Channels for external analog instruments (0 – 10 Volts DC)
- RS-232 Connection for select Treadmills and Ergometers
- Heart Rate Interface with Polar monitor
- 4.2 Liter Active Mixing Chamber
- Efficient Nafion-based desiccant box with molecular sieve & silica gel indicator
- Two-Way Breathing Valve and Tubing Connections with Headgear and Mouthpieces
- Heavy-Duty Cart with articulating support arm
- Calibration Gases: Two tanks with regulators of primary laboratory standard gases
- Real time continuous Temperature, Humidity & Pressure Monitoring
- 3 liter calibration syringe
- Laptop Computer or Desktop Computer with Monitor
- Color Ink Jet Printer
- System setup, calibration, and training
- Canopy System for Resting Energy Measurement
- MOXUS Software and Interface Box available for users with their own AEI analyzers
- Alcohol Burn Validation Kit Available
- Cardiac output (CO2 Re-breathe) available
- Extended Warranties Available
- Mask kits
- EKG monitors
- Spirometers
- Pediatric options available
- Treadmills
- Ergometers
- Speed of Response: to 90% of final value in less than 100 milliseconds for a step change in O2 concentration
- Accuracy: ± 0.01% O2
- Repeatability: ± 0.01% O2
- Sensitivity: ± 0.001% O2
- Resolution: Digital Display ± 0.01 % O2
- Operating Range: 0 – 100% O2
- Analog Output: 0 to 10 Volts buffered for 0 – 100% O2
- Ambient Temperature: 0 – 40°C
- Sample Flow Rate: 10 – 500 ml/min, 50 – 200 ml/min recommended for most applications
- Voltage: 120 VAC or 240 VAC
Specifications for the CD-3A Carbon Dioxide Analyzer
- Speed of Response: to 90% of final value in less than 25 milliseconds for a step change in CO2 concentration
- Accuracy: ± 0.02% CO2 0 – 7% CO2 range; 1% of the reading >7 – 15% CO2 range
- Repeatability: ± 0.01% CO2
- Sensitivity: ± 0.001% CO2
- Resolution: Digital Display ± 0.01% of CO2
- Operating Range: 0 – 15% CO2
- Analog Output: 0 to 7.5 Volts buffered for 0 – 15% CO2
- Ambient Temperature: 0 – 40°C
- Sample Flow Rate: 10 – 500 ml/min
- Display: Continuous display of CO2 concentration or End Tidal CO2 for each breath
- Voltage: 120 VAC or 240 VAC
Specifications for the Pneumotach Flow/Volume Measurement
- Flow Range: 0 to greater than 800 liters/minute
- Volume Accuracy: better than ± 1.0% typical
- Resistance to Flow: 2.8 cm H2O at 400 liters/min
Specifications for the Calibration Gases
- E Size Cylinder, Primary Standard, 4% CO2 , 16% O2 ,Bal. N2; accuracy: ± 0.02% CO2 absolute, ± 0.02% O2 absolute
- E Size Cylinder, Primary Standard, 0.03% CO2 , 21% O2 , Bal. N2; accuracy: ± 10% of CO2 component, ± 0.02% O2 absolute
Specifications for the Ambient Temperature / Pressure / Humidity Measurement
- Temperature: ± 0.5 °C
- Pressure: ± 1 mmHg
- Humidity: ± 3% RH
Dimensions
- Width = 36”
- Depth = 24”
- Height = 48” [add 36” for swing arm]
Who Uses the MOXUS
The MOXUS Modular Metabolic Cart is used by university exercise physiology labs, cardiopulmonary rehabilitation clinics, sports performance and human performance centers, and research institutions that need validated, high-accuracy gas exchange data. Common applications include:
- VO2 max and cardiopulmonary exercise testing (CPET) in sports science labs
- Resting metabolic rate (RMR) assessment in clinical and research settings
- Exercise physiology instruction and research at universities
- Cardiac and pulmonary rehabilitation monitoring in hospital and clinic settings
MOXUS vs. MAX-IIa: Which Metabolic Cart Is Right for You?
Feature | MOXUS | MAX-IIa |
Configuration | Fully modular — expand and reconfigure over time | Compact, integrated system |
Analyzer technology | CD-3A & S-3A | CD-3A & S-3A |
Testing modes | RMR and full exercise metabolic testing | RMR and exercise metabolic testing |
Best for | Labs that want flexibility to expand configuration as needs grow | Labs that want a streamlined, all-in-one setup |
Not sure which fits your lab? Both systems share AEI’s core CD-3A and S-3A analyzer technology the right choice usually comes down to how much configuration flexibility you need. Contact our team and we’ll help you compare.
MOXUS Testimonials
What made you choose AEI Technologies over other metabolic carts on the market?
We selected AEI Technologies after evaluating several metabolic measurement systems because of their proven track record with the legendary S-3A Oxygen and CD-3A Carbon Dioxide analyzers. The MOXUS system’s reputation for unsurpassed accuracy and repeatability, combined with their comprehensive support offerings, made them the clear choice for our research needs. Their modular design and flexibility to accommodate both research and clinical applications was particularly appealing.
Can you talk a little bit about your application? How has the system improved or impacted your research, teaching, or clinical work?
The MOXUS Metabolic System has significantly enhanced our research capabilities. The system’s breath-by-breath measurement precision and active mixing chamber technology provides the accurate, reliable data we need for our metabolic studies. The user-friendly software interface makes data collection and analysis straightforward, while the comprehensive reporting features have streamlined our workflow. Phil, the lead engineer, even went above and beyond by reviewing our initial study data and developing a custom program to help us analyze data using the European Respiratory Society’s 9-panel plot format – this level of technical support has been invaluable to our research.
What has your experience been like working with AEI from purchase through installation and support?
Our experience with AEI Technologies has been exceptional from start to finish. They have been incredibly responsive to any questions throughout the entire process. The on-site support was terrific – Ethan proved to be an expert in setting up the equipment, patiently answering all our questions, and providing valuable feedback on best practices. Their technical team’s expertise and willingness to provide ongoing support has made our transition to the new system seamless.
Was there a specific AEI feature or spec that made a noticeable difference in your results or workflow?
The equipment is remarkably easy to use and calibrate, making it a superb platform for our work. The system’s accuracy specifications (±0.01% O2 and ±0.02% CO2) and fast response times provide the precision we need for our research. The comprehensive software package with real-time monitoring, flexible data export options, and detailed reporting capabilities has significantly improved our data analysis workflow. Additionally, the modular design allows us to adapt the system for different study protocols, making it incredibly versatile for both clinical and research purposes.
Dustin Boone MD, MPH
Associate Professor of Anesthesiology and Neurology
Director, Perioperative Cardiopulmonary Exercise Testing
Dartmouth Health
Frequently Asked Questions
How much does the MOXUS metabolic cart cost?
Pricing depends on configuration analyzer options, testing modes, and accessories all affect cost. Contact us for a personalized quote based on your lab’s specific needs.