Performance evaluation of a cheap,open source,digital environmental monitor based on the Raspberry Pi |
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| Affiliation: | 1. Donlinks School of Economics and Management, University of Science and Technology Beijing, No. 30 Xueyuan Road, Haidian District, Beijing 100083, People’s Republic of China;2. School of Economics and Management, Tsinghua University, No. 30 Shuangqing Road, Haidian District, Beijing 100084, People’s Republic of China;3. Ocean College, Hebei Agricultural University, Hebei 071001, People’s Republic of China;1. Faculty of Science and Industrial Technology, Prince of Songkla University, Surat Thani Campus, Mueang, Surat Thani 84100, Thailand;2. Department of Natural Resource Ecology & Management, Oklahoma State University, Stillwater, OK 74078-6013, USA;1. KIIT University, Bhubaneswar, India;2. Siksha O Anusandhan University, Bhubaneswar, India;3. BITS, Dubai, United Arab Emirates;1. Wroc?aw University of Technology, Faculty of Microsystem Electronics and Photonics, PL-50372 Wroc?aw, Poland;2. Princeton University, Department of Electrical Engineering, Engineering Quadrangle, 08544 NJ, United States |
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| Abstract: | We report on the design, construction and evaluation of a low-cost digital environmental monitoring system based on a popular micro-computer board and mass market digital sensors. The system is based around the use of open source software and readily available digital sensors, providing key parameters required for environmentally-controlled calibration laboratories: air temperature, pressure and humidity. Each system logs data at set intervals with front-panel display, web page graphical display and email alerting when exceeding set tolerances. The sensors have been calibrated at the National Physical Laboratory using standards traceable to the SI. Long term stability of the system is estimated and in addition to monitoring of laboratory environments for regulatory purposes, the systems can also be used to provide on-demand values for local refractive index with an expanded (k = 2) uncertainty of 1.1 × 10?7 as required for many optical-based measuring systems. |
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| Keywords: | Environment Calibration Metrology Air sensor Open source Data logging |
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