Patent ID: 9482653
Filing Date: 2016-11-01
CPC Classification: A01G,G01F,G01N

Claim Text:
1. 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 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 exiting the outlet of the sample chamber; a second gas analyzer coupled with the second output port of the active flow splitting device and configured to measure a concentration of said gas exiting the second output port of the active flow splitting device; a flow meter coupled between 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 of gas entering the inlet of the sample chamber; and a feedback control circuit adapted to control the active flow splitting device to adjust the gas flow provided to the first output port responsive to a flow rate signal from the flow meter.