Optical Detection of Moisture in Air and in Soil Using Dye-Doped Plastic Fibers
- 1 June 1990
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 29 (6A) , L1023
- https://doi.org/10.1143/jjap.29.l1023
Abstract
The moisture-sensitive plastic fiber consists of poly-methylmethacrylate doped with phenol-red dye. The propagation loss of this fiber at around 530 nm increases with increasing water vapor in air, and hence it operates as an excellent humidity sensor with a fast response time. This fiber can also be used for optically detecting moisture equivalent in the soil.Keywords
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