Richard Lab:Review of photoacoustic sensing

From OpenWetWare

(Difference between revisions)
Jump to: navigation, search

Halayc (Talk | contribs)
(New page: back to Richard_Lab:literature {| border="1" !width="125"|Reference !width="550"|Information extracted !width="60"|entry made by |- | basics || in a photoacoustic sensor a gas sample...)
Next diff →

Revision as of 12:23, 10 August 2007

back to Richard_Lab:literature

Reference Information extracted entry made by
basics in a photoacoustic sensor a gas sample is imported to a chamber where it is trapped, and pulsed with a infra red light, at a wave legth range specific to the gas being measured. The wave length range is created by passing the IR light through a filter. The IR pulse causes the gases volume to change at every pulse, creating a pressure change pattern detected by a microphone placed in the sample chamber. The resulting sound wave varies with the concentration of the measured gas, which is interpolated through a calibration curve. In the Innova gas monitor (Innova, DK), the calibration curve is programmed into the sensor and the gas concentration is automatically output. .
High sensitivity in gas analysis with photoacoustic detection. Jyrki Kauppinen, Klaus Wilcken, Ismo Kauppinen and Vesa Koskinen . Department of Physics, University of Turku, Vesilinnantie 5, FIN-20014, Turku, Finland . Microchemical Journal. Volume 76, Issues 1-2, February 2004, Pages 151-159 Available online 10 March 2004. Replacing the microphone with a new type of pressure sensor inreased the sensitivity of a photoacoustic sensor; it detected methane at lower than 1 ppb. The article also includes a good introduction on photoacoustic sensing. Hala
. . .
. . .
. . .
. . .
Personal tools