- Capability to analyze trace concentrations of CO2, CH4, and N2O. - Include a survey chamber that is compatible with the analyzers and must have o An onboard mixing pump to ensure the gas sample in the chamber is adequately mixed as it loops to the analyzers, o The ability to open and close automatically, o An SDI-12 port for a Soil Moisture Probe, o A Thermocouple port for soil temperature measurements, o A Lithium-ion battery as a power source, o A pressure vent to ensure equal pressure between within the chamber and outside air. - Include a soil temperature and soil moisture probe (combined probe or separate probes) that is compatible with the analyzers. - Measurement of trace gas concentrations at a frequency of one sample per second (1 Hz). - Analytical range of at least 0-100 ppm for CH4 and N2O, and 0-10,000 ppm for CO2 with a precision of 0.6 ppb at 2 ppm CH4, 0.4 ppb at 330 ppb N2O, and 3.5 ppm at 400 ppm CO2. - The response time (T10-T90) should be less than 5 seconds.
