Abstract: A multiple sensor array for breath acetone measurement has a semiconductor sensor that measures concentration of a set of volatile organic compounds. An electrochemical sensor measures volatile organic compounds or other gasses such as carbon monoxide. At least one correction sensor that measures other breath properties can also form a part of the multiple sensor array, providing information on physical properties such as pressure and temperature, and information related to individual gases including carbon monoxide, water vapor, hydrogen, ethylene oxide, and the like. An acetone concentration calculation module takes measured values from the multiple sensor array to measure breath acetone, which can be stored and displayed for a user.

Abstract: Disclosed is a breath quality analysis device having a housing, a sensor, and a mouthpiece. The housing includes an inlet opening, one or more outlet openings, and an inner cavity. The inner cavity defines a path between the inlet opening and the one or more outlet openings. The sensor is disposed inside the inner cavity of the housing. The mouthpiece is coupled to the inlet opening of the housing and includes a blower configured to draw air into the inner cavity of the housing.

Abstract: A breath analysis device has a housing that limits pressure from a user's breath that passes over a sensor, improving sensor readings of the sensor. The housing includes an inlet opening, one or more outlet openings, and an inner cavity. The inner cavity defines a path between the inlet opening and the one or more outlet openings. The inner cavity includes a sensor housing, a high resistance path between the inlet opening and the sensor housing, a first low resistance path between the housing and a first subset of outlet openings of the one or more outlet openings, and a second low resistance path between the inlet opening and a second subset of outlet openings of the one or more outlet openings. Breath that passes into the sensor housing is analyzed by sensors in the sensor housing.