An H2S Sensor Based on Electrochemistry for Chicken Coops

The recent modernization of the livestock industry lags behind the scale of the livestock industry, particularly in indoor environmental monitoring. In particular, the H2S gas concentration in chicken coops affects the growth and reproductive capacity of the chickens and threatens their health. Ther...

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Main Authors: Lihua Zeng, Mei He, Huihui Yu, Daoliang Li
Format: Article
Language:English
Published: MDPI AG 2016-08-01
Series:Sensors
Subjects:
Online Access:http://www.mdpi.com/1424-8220/16/9/1398
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author Lihua Zeng
Mei He
Huihui Yu
Daoliang Li
author_facet Lihua Zeng
Mei He
Huihui Yu
Daoliang Li
author_sort Lihua Zeng
collection DOAJ
description The recent modernization of the livestock industry lags behind the scale of the livestock industry, particularly in indoor environmental monitoring. In particular, the H2S gas concentration in chicken coops affects the growth and reproductive capacity of the chickens and threatens their health. Therefore, the research and development of a low-cost, environmentally friendly sensor that can achieve on-line monitoring of H2S gas has a notably important practical significance. This paper reports the design of an H2S gas sensor, with selection of an electrochemical probe with high accuracy and wide measurement range using the relatively mature technology of electrochemical sensors. Although the probe of the sensor is the main factor that affects the sensor accuracy, the probe must be combined with a specifically designed signal condition circuit that can overcome the lack of an electrode to satisfy the requirements for the interconnection and matching between the output signal and the test instrument. Because the output current of the electrochemical electrode is small and likely to be disturbed by noise, we designed signal-conditioning modules. Through the signal-conditioning circuit, the output signal of the current electrode can be converted into a voltage and amplified. In addition, we designed a power control module because a bias voltage is necessary for the electrode. Finally, after the calibration experiment, the accurate concentration of H2S gas can be measured. Based on the experimental analysis, the sensor shows good linearity and selectivity, comparatively high sensitivity, perfect stability and an extremely long operating life of up to two years.
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spelling doaj.art-b73f0680e7ee4698815533db0a333b002022-12-22T04:22:16ZengMDPI AGSensors1424-82202016-08-01169139810.3390/s16091398s16091398An H2S Sensor Based on Electrochemistry for Chicken CoopsLihua Zeng0Mei He1Huihui Yu2Daoliang Li3Beijing Engineering and Technology Research Center for Internet of Things in Agriculture, China Agricultural University, Beijing 100083, ChinaBeijing Engineering and Technology Research Center for Internet of Things in Agriculture, China Agricultural University, Beijing 100083, ChinaBeijing Engineering and Technology Research Center for Internet of Things in Agriculture, China Agricultural University, Beijing 100083, ChinaBeijing Engineering and Technology Research Center for Internet of Things in Agriculture, China Agricultural University, Beijing 100083, ChinaThe recent modernization of the livestock industry lags behind the scale of the livestock industry, particularly in indoor environmental monitoring. In particular, the H2S gas concentration in chicken coops affects the growth and reproductive capacity of the chickens and threatens their health. Therefore, the research and development of a low-cost, environmentally friendly sensor that can achieve on-line monitoring of H2S gas has a notably important practical significance. This paper reports the design of an H2S gas sensor, with selection of an electrochemical probe with high accuracy and wide measurement range using the relatively mature technology of electrochemical sensors. Although the probe of the sensor is the main factor that affects the sensor accuracy, the probe must be combined with a specifically designed signal condition circuit that can overcome the lack of an electrode to satisfy the requirements for the interconnection and matching between the output signal and the test instrument. Because the output current of the electrochemical electrode is small and likely to be disturbed by noise, we designed signal-conditioning modules. Through the signal-conditioning circuit, the output signal of the current electrode can be converted into a voltage and amplified. In addition, we designed a power control module because a bias voltage is necessary for the electrode. Finally, after the calibration experiment, the accurate concentration of H2S gas can be measured. Based on the experimental analysis, the sensor shows good linearity and selectivity, comparatively high sensitivity, perfect stability and an extremely long operating life of up to two years.http://www.mdpi.com/1424-8220/16/9/1398coopH2S gassensor
spellingShingle Lihua Zeng
Mei He
Huihui Yu
Daoliang Li
An H2S Sensor Based on Electrochemistry for Chicken Coops
Sensors
coop
H2S gas
sensor
title An H2S Sensor Based on Electrochemistry for Chicken Coops
title_full An H2S Sensor Based on Electrochemistry for Chicken Coops
title_fullStr An H2S Sensor Based on Electrochemistry for Chicken Coops
title_full_unstemmed An H2S Sensor Based on Electrochemistry for Chicken Coops
title_short An H2S Sensor Based on Electrochemistry for Chicken Coops
title_sort h2s sensor based on electrochemistry for chicken coops
topic coop
H2S gas
sensor
url http://www.mdpi.com/1424-8220/16/9/1398
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