| 摘要 |
A device for testing human exhalation for halitosis, comprising a chamber having an air inlet through which the exhalation to be tested is admitted into the chamber and an air outlet through which the exhalation tested is discharged from the chamber, a sensor element located in the chamber and, when heated to a first temperature, sensitive to malodorant gases of predetermined chemical compositions for producing a signal variable with the detected concentration of the malodorant gases, a heater element which, when electrically activated, is operative to heat the sensor element selectively to the first temperature or a second temperature, the second temperature being higher than the first temperature and being selected to regenerate the sensing means, a control circuit responsive to the signal from the sensor element for determining the degree of malodorousness on the basis of the signal and producing a signal representative of the degree of malodorousness determined, and a display screen or a plurality of indicators responsive to the signal from the control circuit for displaying information relating to the degree of malodorousness represented by the signal from the control circuit.
|
