TY - GEN
T1 - Investigation of binary liquid aqueous methanol and ethanol mixtures using meander-shaped fibre-optic evanescent-wave absorption sensors
AU - Fabian, Matthias
AU - Lewis, Elfed
AU - Newe, Thomas
AU - Lochmann, Steffen I.
PY - 2008
Y1 - 2008
N2 - A fibre-optic evanescent-wave field absorption sensor based on a meander-shaped sensing probe is described. The influences of the fibre core diameter and the refractive index of the surrounding medium on the sensitivity are evaluated by using binary liquid mixtures, in particular methanol and ethanolsolved in distilled water at concentrations from 0 to 10 volume percent (%vol). The resolution was experimentally proved to be about 5.10.05 refractive index units at a wavelength of 650nm, which corresponds to a resolution of about 0.2%vol methanol and 0.1%vol ethanol concentration. The LED based design as well as the chosen wavelength (POF suitable) result in a low cost sensingapplication. Finally, an analytical approach for predicting the refractices indices of liquid mixtures (Lorentz-Lorenz equation) was examined for validity with regards to the mentioned aqueous methanol/ethanol solutions.
AB - A fibre-optic evanescent-wave field absorption sensor based on a meander-shaped sensing probe is described. The influences of the fibre core diameter and the refractive index of the surrounding medium on the sensitivity are evaluated by using binary liquid mixtures, in particular methanol and ethanolsolved in distilled water at concentrations from 0 to 10 volume percent (%vol). The resolution was experimentally proved to be about 5.10.05 refractive index units at a wavelength of 650nm, which corresponds to a resolution of about 0.2%vol methanol and 0.1%vol ethanol concentration. The LED based design as well as the chosen wavelength (POF suitable) result in a low cost sensingapplication. Finally, an analytical approach for predicting the refractices indices of liquid mixtures (Lorentz-Lorenz equation) was examined for validity with regards to the mentioned aqueous methanol/ethanol solutions.
UR - http://www.scopus.com/inward/record.url?scp=67649947130&partnerID=8YFLogxK
U2 - 10.1109/ICSENS.2008.4716455
DO - 10.1109/ICSENS.2008.4716455
M3 - Conference contribution
AN - SCOPUS:67649947130
SN - 9781424425808
T3 - Proceedings of IEEE Sensors
SP - 359
EP - 362
BT - 2008 IEEE Sensors, SENSORS 2008
T2 - 2008 IEEE Sensors, SENSORS 2008
Y2 - 26 October 2008 through 29 October 2009
ER -