High-accuracy measurement of low-water-content in liquid using NIR spectral absorption method

Bao-Jin Peng; Xu Wan; Hong-Zhen Jin; Yong Zhao; He-Fa Mao

doi:10.1117/12.570907

20 January 2005 High-accuracy measurement of low-water-content in liquid using NIR spectral absorption method

Bao-Jin Peng, Xu Wan, Hong-Zhen Jin, Yong Zhao, He-Fa Mao

Proceedings Volume 5633, Advanced Materials and Devices for Sensing and Imaging II; (2005) https://doi.org/10.1117/12.570907
Event: Photonics Asia, 2004, Beijing, China

Abstract

Water content measurement technologies are very important for quality inspection of food, medicine products, chemical products and many other industry fields. In recent years, requests for accurate low-water-content measurement in liquid are more and more exigent, and great interests have been shown from the research and experimental work. With the development and advancement of modern production and control technologies, more accurate water content technology is needed. In this paper, a novel experimental setup based on near-infrared (NIR) spectral technology and fiber-optic sensor (OFS) is presented. It has a good measurement accuracy about ∓ 0.01%, which is better, to our knowledge, than most other methods published until now. It has a high measurement resolution of 0.001% in the measurement range from zero to 0.05% for water-in-alcohol measurement, and the water-in-oil measurement is carried out as well. In addition, the advantages of this method also include pollution-free to the measured liquid, fast measurement and so on.

Citation Download Citation

Bao-Jin Peng, Xu Wan, Hong-Zhen Jin, Yong Zhao, and He-Fa Mao "High-accuracy measurement of low-water-content in liquid using NIR spectral absorption method", Proc. SPIE 5633, Advanced Materials and Devices for Sensing and Imaging II, (20 January 2005); https://doi.org/10.1117/12.570907

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