PROBLEM TO BE SOLVED: To provide a wavelength sensor device for plants with which it is possible to respond to various growth factors of an object the growth state of which is to be measured.SOLUTION: Provided is a wavelength sensor device 10 for plants comprising: a light-emitting unit (21) for emitting a measurement light P with which a growth state measurement object (Cr) is irradiated a light-receiving unit (22) for receiving the reflected light Pr of the measurement light P due to the growth state measurement object and control units (23, 24, 25) for controlling the drive of the light-emitting unit and light-receiving unit. The control units emit the measurement light P of a wavelength band that corresponds to a selected growth factor Eg from the light-emitting unit, receives, by the light-receiving unit, the reflected light Pr, from the growth state measurement object, of the measurement light P of each wavelength band that corresponds to a selected growth factor Eg, and finds the intensity of reflected light, by the growth state measurement object, in each wavelength band that corresponds to the growth factor Eg.SELECTED DRAWING: Figure 8COPYRIGHT: (C)2017,JPO&INPIT【課題】生育状況測定対象の様々な生育要素に対応することのできる植物用波長センサ装置を提供する。【解決手段】生育状況測定対象(Cr)を照射する測定光Pを出射する発光部(21)と、生育状況測定対象による測定光Pの反射光Prを受光する受光部(22)と、発光部と受光部とを駆動制御する制御部(23、24、25)と、を備える植物用波長センサ装置10である。制御部は、選択された生育要素Egに対応する波長帯域の測定光Pを発光部から出射し、選択された生育要素Egに対応する各波長帯域の測定光Pに対する生育状況測定対象からの反射光Prを受光部で受光して、生育状況測定対象による生育要素Egに対応する各波長帯域での反射光量を求める。【選択図】 図8
