2. Objective is to create a field deployable automated CO 2 and N 2 O gas trapping device Trapping events occur every four hours Traps replaced after one month Components Flux Chamber Two Sub-chambers Desiccant Trap CO 2 Chemical Trap N 2 O Molecular Sieve Trap CO 2 Molecular Sieve Trap Rain-water Drop System

4. Valves Manual Solenoid Pump Flow Rate: 130 mL/min

5. Servo Mechanism Motor Fan

6. Materials in contact with the gases must be chemically inert and gas impermeable Outer Casing and Sub-chambers White PVC – avoiding the greenhouse effect Desiccant Trap Nafion Tubing CO 2 Chemical Trap 304 Stainless Steel Tubing Carbosorb CO 2 and N 2 O Traps 304 Stainless Steel Tubing Molecular Sieve 5A Tubing PEEK

7. Assembly Criteria – small profile, sturdy, and easy to use Airtight System Fittings and Adapters CAD Drawings Machined in the ME Shop

9. Control of servos, solenoids, circulation fans, pumps State machine pertaining phases of device operation Error checking Sensors provide information about device functionality Allows for quick repair, operation during non critical failure Governed by microcontroller

10. Programmable System on Chip (PSoC) Visual, code-free embedded design C language base Manually edit code CY3214-PSoCEvalUSB

11. Demands of system Operates unattended for weeks Hours between samples Microcontroller very demanding The external timer Battery decision All-Battery.com

12. CO 2 and N 2 O levels will be used to determine impact of farming This will facilitate carbon credit trading on global scale Profitable to farmers Reduces waste Cost of end product is low Will promote ecologically friendly farming practices Questions?