Odor concentration measuring device

Details Odor concentration measuring device Odor concentration measuring device

1998-08-05

1999-12-28

Williams, Hezron

Measuring and testing

Gas analysis

Odor

600303, G01N 700

Patent

active

060065834

ABSTRACT:
There is disclosed an odor concentration measuring device which can objectively and easily measure an odor concentration. The odor concentration measuring device 1 is provided with an injector having a cylinder 3 and a piston 5, and an odor sensor 11 is fixed to an inner wall 3a of the cylinder 3. The odor sensor 11 measures the odor of air inside the cylinder 3, and outputs a voltage V in accordance with the odor intensity. A control box 7 provided on the outer periphery of the cylinder 3 is provided with an electronic control circuit, which allows a blue LED 9b to light instead of a red LED 9r when the voltage V reaches a value corresponding to the odor intensity which cannot be perceived by people. By reciprocating the piston 5, the sample air is diluted. The odor concentration can be measured by the dilution magnification at which the lighting state of the LED 9r or 9b is changed. Since the odor concentration is measured by the dilution magnification, measurement results which satisfactorily correspond to human olfaction can be obtained.

REFERENCES:
patent: 3885550 (1975-05-01), MacLeod
patent: 4265248 (1981-05-01), MacLeod
patent: 4884435 (1989-12-01), Ehara
patent: 5767385 (1998-06-01), Bundy et al.

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