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Construction and Testing of an Inexpensive PAR Sensor
Peter FielderP. G. ComeauBritish Columbia. Ministry of Forests. Research Branch
出版British Columbia, Ministry of Forests Research Program, 2000
主題Science / Physics / Optics & Light
ISBN077264392X9780772643926
URLhttp://books.google.com.hk/books?id=VbQsAQAAMAAJ&hl=&source=gbs_api
註釋Detailed studies of light in forest canopies typically require a large number of light sensors, but the high cost of commercially available sensors can be prohibitive for many research budgets. This report describes the construction & testing of a practical, rugged, and inexpensive sensor for measuring photosynthetically active radiation (PAR). Detailed instructions are provided for assembly and calibration of a sensor made from a gallium arsenide phosphide photodiode held within a protective casing of acrylic and aluminium. Field tests compared the performance of the sensor with that of a standard LI-190 quantum sensor. Results of the tests are presented with regard to sensor stability, linearity, drift, data variability, and spectral response error.