3 October 1988 A Portable Solid-State Moisture Meter For Agricultural And Food Products
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Proceedings Volume 0917, Recent Developments and Applications of Infrared Analytical Instruments; (1988); doi: 10.1117/12.945579
Event: Sira/SPIE Infrared Meeting, 1988, London, United Kingdom
Abstract
This paper reports on the development of a small, robust, battery operated near infra-red (NIR) reflectance device, designed for rapid on-farm measurement of the moisture content of forage crops without prior sample preparation. It has potential application to other agricultural or food materials. The instrument is based on two light emitting diodes (LEDs), a germanium detector and a control CMOS single chip microcomputer. The meter has been calibrated to give a direct read out of moisture content for 4 common grass varieties at 3 stages of development. The accuracy of a single point measurement on a grass sample is approximately ± 6% over a range of 40-80% (wet basis). However, the potential accuracy on a homogeous sample may be as goon as 0.15%.
© (1988) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
C R Bull, J V Stafford, G S Weaving, "A Portable Solid-State Moisture Meter For Agricultural And Food Products", Proc. SPIE 0917, Recent Developments and Applications of Infrared Analytical Instruments, (3 October 1988); doi: 10.1117/12.945579; https://doi.org/10.1117/12.945579
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KEYWORDS
Light emitting diodes

Reflectivity

Absorption

Calibration

Near infrared

Sensors

Signal detection

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