Abstract: Quantitative colorimetric carbon dioxide detection and measurement systems are disclosed. The systems can include a gas conduit, a colorimetric indicator adapted to exhibit a color change in response to exposure to carbon dioxide gas, a temperature controller operatively coupled to the colorimetric indicator and configured to control the temperature of the colorimetric indicator, an electro-optical sensor assembly including a light source or sources adapted to transmit light to the colorimetric indicator, and a photodiode or photodiodes configured to detect light reflected from the colorimetric indicator and to generate a measurement signal, and a processor in communication with the electro-optical sensor assembly. The processor can be configured to receive the measurement signal generated by the electro-optical sensor assembly and to compute a concentration of carbon dioxide based on the measurement signal.
Type:
Grant
Filed:
July 16, 2014
Date of Patent:
January 8, 2019
Assignee:
PALO ALTO HEALTH SCIENCES, INC.
Inventors:
Leslie E. Mace, Elizabeth K. Siegelman, Debra L. Reisenthel, Simon W. H. Thomas