Fiber optic chemical sensor systems for monitoring pH changes in concrete

2004 ◽  
Author(s):  
Muhammed P. Basheer ◽  
Kenneth T. V. Grattan ◽  
Tong Sun ◽  
Adrian E. Long ◽  
Daniel McPolin ◽  
...  
Keyword(s):  
Chemical Sensor ◽  
Fiber Optic ◽  
Sensor Systems ◽  
Ph Changes

scholarly journals Fiber optic sensor systems for non-destructive monitoring of “smart buildings”

2019 ◽  
Vol 1327 ◽  
pp. 012025
Author(s):  
M M Gizeev ◽  
P E Denisenko ◽  
K A Lipatnikov ◽  
A A Kuznetsov ◽  
E P Denisenko
Keyword(s):  
Fiber Optic ◽  
Fiber Optic Sensor ◽  
Sensor Systems ◽  
Smart Buildings ◽  
Optic Sensor ◽  
Non Destructive

scholarly journals Fiber-Optic Time-Resolved Fluorescence Sensor for in Vitro Serotonin Determination

1993 ◽  
Vol 47 (5) ◽  
pp. 590-597 ◽  
Author(s):  
Stephane Mottin ◽  
Canh Tran-Minh ◽  
Pierre Laporte ◽  
Raymond Cespuglio ◽  
Michel Jouvet
Keyword(s):  
Chemical Sensor ◽  
Fiber Optic ◽  
Fiber Optic Sensor ◽  
Excitation Wavelength ◽  
Nitrogen Laser ◽  
Time Resolved ◽  
Temporal Effects ◽  
Starting Point

At pH 7 and with the excitation at wavelengths above 315 nm, previously unreported fluorescence of 5-HT (5-hydroxytryptamine) is observed. Two fluorescence bands were observed for 5-HT; the first emits at around 390 nm with an associated lifetime near 1 ns, and the other (well known) emits at 340 nm with an associated lifetime of 2.7 ns. With both static and time-resolved fluorescences, the spectral and temporal effects of the excitation wavelength were studied between 285 and 340 nm. With these basic spectroscopic properties as a starting point, a fiber-optic chemical sensor (FOCS) was developed in order to measure 5-HT with a single-fiber configuration, nitrogen laser excitation, and fast digitizing techniques. Temporal effects including fluorescence of the optical fiber were studied and compared with measurements both directly in cuvette and through the fiber-optic sensor. Less than thirty seconds are required for each measurement. A detection limit of 5-HT is reached in the range of 5 μM. Our system, with an improved sensitivity, could therefore be a possible and convenient “tool” for in vivo determination of 5-HT.

scholarly journals FIBER-OPTIC CHEMICAL SENSOR USING VISIBLE SEMICONDUCTOR LASER AND PLASTICIZED POLY (VINYL CHLORIDE) MEMBRANE

1991 ◽  
Vol 7 (Supple) ◽  
pp. 1465-1468 ◽  
Author(s):  
YUJI KAWABATA ◽  
KEN-ICHI YASUNAGA ◽  
TOTARO IMASAKA ◽  
NOBUHIKO ISHIBASHI
Keyword(s):  
Semiconductor Laser ◽  
Vinyl Chloride ◽  
Chemical Sensor ◽  
Fiber Optic ◽  
Poly Vinyl Chloride

Ring fiber-optic sensor systems

2008 ◽  
Author(s):  
Qi-ren Zhuang ◽  
Jiaxian Wang ◽  
Shuang Meng ◽  
Bin Lei ◽  
Jian-wen Lin
Keyword(s):  
Fiber Optic ◽  
Fiber Optic Sensor ◽  
Sensor Systems ◽  
Optic Sensor
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