United States of America as Represented by the Administrator of Nasa

Daniel P Glavin

Shahid Aslam

Gerard T Quilligan

John R Kolasinski

Nicolas Gorius

Dat Tran

Perry A Gerakines

Todd C Purser

An apparatus for measuring vapor partial pressures of water and carbon dioxide includes a pair of infrared (IR) sources and a pair of quad filter detectors are placed opposite to one another such that the vapor partial pressures of water (HO) and carbon dioxide (CO) is measured and quantified in a short pathlength gas cell.

Compact non-dispersive infrared gas analyzer

An apparatus include one or more DACs and a resistor divider are configured to generate a variable bias voltage Vwith respect to a CM voltage V. The CM voltage Vis applied to a cathode of one or more thermopiles or a negative input of one or more amplifiers to prevent saturation and over range of one or more low voltage readout amplifiers and one or more ADCs.

Thermopile bias method for low voltage infrared readout integrated circuits

Growing community of inventors

Greenbelt, MD, United States of America

Daniel P Glavin