Sensors 2011, 11(11), 10930-10939; doi:10.3390/s111110930
Article

Dynamic Control of Adsorption Sensitivity for Photo-EMF-Based Ammonia Gas Sensors Using a Wireless Network

1 Intelligent HCI Convergence Research Center, Sungkyunkwan University, 300, Cheoncheon-Dong, Jangan-Gu, Suwon, Gyenggi-Do, 440-746, Korea 2 School of Information and Communication Engineering, Department of Interaction Science, Sungkyunkwan University, 300, Cheoncheon-Dong, Jangan-Gu, Suwon, Gyenggi-Do, 440-746, Korea 3 Department of Electrical and Computer Engineering, School of Engineering and Technology, Indiana University, 723 W. Michigan Street, SL 160, Indianapolis, IN 46202, USA
* Author to whom correspondence should be addressed.
Received: 13 October 2011; in revised form: 11 November 2011 / Accepted: 18 November 2011 / Published: 22 November 2011
(This article belongs to the Section Physical Sensors)
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Abstract: This paper proposes an adsorption sensitivity control method that uses a wireless network and illumination light intensity in a photo-electromagnetic field (EMF)-based gas sensor for measurements in real time of a wide range of ammonia concentrations. The minimum measurement error for a range of ammonia concentration from 3 to 800 ppm occurs when the gas concentration magnitude corresponds with the optimal intensity of the illumination light. A simulation with LabView-engineered modules for automatic control of a new intelligent computer system was conducted to improve measurement precision over a wide range of gas concentrations. This gas sensor computer system with wireless network technology could be useful in the chemical industry for automatic detection and measurement of hazardous ammonia gas levels in real time.
Keywords: photo-EMF-based gas sensors; adsorption sensitivity; sensor simulation; wireless sensor network

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MDPI and ACS Style

Vashpanov, Y.; Choo, H.; Kim, D.S. Dynamic Control of Adsorption Sensitivity for Photo-EMF-Based Ammonia Gas Sensors Using a Wireless Network. Sensors 2011, 11, 10930-10939.

AMA Style

Vashpanov Y, Choo H, Kim DS. Dynamic Control of Adsorption Sensitivity for Photo-EMF-Based Ammonia Gas Sensors Using a Wireless Network. Sensors. 2011; 11(11):10930-10939.

Chicago/Turabian Style

Vashpanov, Yuriy; Choo, Hyunseung; Kim, Dongsoo Stephen. 2011. "Dynamic Control of Adsorption Sensitivity for Photo-EMF-Based Ammonia Gas Sensors Using a Wireless Network." Sensors 11, no. 11: 10930-10939.

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