Objective is to create a field deployable automated CO2 and N2O gas trapping device Trapping events occur every four hours Traps replaced after one month Components Flux Chamber Multiple Sub-chambers Desiccant Trap CO2 Chemical Trap N2O Molecular Sieve Trap CO2 Molecular Sieve Trap Rain-water Drop System

Valves Manual Solenoid Pump Flow Rate: 130 mL/min

Servo Mechanism Motor Fan

Outer Casing and Sub-chambers Desiccant Trap CO2 Chemical Trap 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 CO2 Chemical Trap 304 Stainless Steel Tubing Carbosorb CO2 and N2O Traps Molecular Sieve 5A Tubing PEEK

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

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

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

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

CO2 and N2O 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?