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Proceedings Paper

A Portable Solid-State Moisture Meter For Agricultural And Food Products
Author(s): C R Bull; J V Stafford; G S Weaving
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Paper 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%.

Paper Details

Date Published: 3 October 1988
PDF: 4 pages
Proc. SPIE 0917, Recent Developments and Applications of Infrared Analytical Instruments, (3 October 1988); doi: 10.1117/12.945579
Show Author Affiliations
C R Bull, AFRC Institute of Engineering Research (UK)
J V Stafford, AFRC Institute of Engineering Research (UK)
G S Weaving, AFRC Institute of Engineering Research (UK)


Published in SPIE Proceedings Vol. 0917:
Recent Developments and Applications of Infrared Analytical Instruments

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