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Open AccessArticle

A Novel Method and an Equipment for Generating the Standard Moisture in Gas Flowing through a Pipe

Ball Wave Inc., T-Biz 503, 6-6-40, Aza Aoba, Aramaki, Aoba, Sendai, Miyagi 980-8579, Japan
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Sensors 2018, 18(10), 3438; https://doi.org/10.3390/s18103438
Received: 3 September 2018 / Revised: 7 October 2018 / Accepted: 8 October 2018 / Published: 13 October 2018
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Abstract

When inert gas containing water molecules flows into a metal pipe, the water molecules cannot exit instantaneously from the outlet of the pipe but are captured at adsorption sites on the inner surface of the pipe until most of the sites are occupied. A theoretical model and a subsequent experiment in this article show that the delay time depends on the amount of moisture level; the higher the moisture-level, the shorter the delay time. Based on the result, we propose a new method and its implementation to the validation of a standard moisture generation to be used in the field measurement such as in factories and pipe lines. View Full-Text
Keywords: Trace moisture; ball SAW sensor; surface acoustic wave; permeation tube Trace moisture; ball SAW sensor; surface acoustic wave; permeation tube
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Tsukahara, Y.; Hirayama, O.; Takeda, N.; Oizumi, T.; Fukushi, H.; Sato, N.; Tsuji, T.; Yamanaka, K.; Akao, S. A Novel Method and an Equipment for Generating the Standard Moisture in Gas Flowing through a Pipe. Sensors 2018, 18, 3438.

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