Hallett, Stephen H.Partridge, MatthewJames, StephenTiwari, AshutoshFarewell, Timothy S.Tatam, Ralph P.2017-06-152017-06-152017-04-23J.S. Hallett, M. Partridge, S.W. James, D. Tiwari, T. Farewell, S.H. Hallett, R.P. Tatam. Soil moisture content measurement using optical fiber long period gratings. 25th International Conference on Optical Fiber Sensors, 24-28 April 2017, Jeju, Republic of Korea‎0277-786Xhttp://dx.doi.org/10.1117/12.2263427http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=2622180https://dspace.lib.cranfield.ac.uk/handle/1826/12031The use of an optical fibre long period grating (LPG) as a soil moisture sensor is reported. Characterization of the device in both clay and sandy soils revealed a sensitivity to moisture levels in the range 10-50%, and the results were compared with the output from a Theta probe, the standard soil moisture sensor, which measures the impedance of the soil. © (2017) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.en©2017. SPIE. Please refer to any applicable publisher terms of use.Long Period GratingFiber opticgratingssoilmoistureConference paper