Patent ID: 8910506

Claim:
A gas exchange analysis sensor head apparatus comprising: an active flow splitting device having a first output port and a second output port, the active flow splitting device configured to variably split an incoming gas flow in continuously varying proportions between the first and second output ports; a sample chamber having an inlet and an outlet, the inlet coupled with the first output port of the active flow splitting device; a first gas analyzer coupled with the outlet of the sample chamber and configured to measure a concentration of a gas; a second gas analyzer directly coupled with the second output port of the active flow splitting device and configured to measure a concentration of said gas; a flow meter directly coupled with the first output port of the active flow splitting device and the inlet of the sample chamber, the flow meter configured to measure a flow rate between the active flow splitting device and the inlet of the sample chamber; and a feedback control circuit adapted to control the active flow splitting device to adjust the incoming gas flow to the first and second output ports responsive to a flow rate signal from the flow meter.