A Miniaturized On-Chip Colorimeter for Detecting NPK Elements
Recently, precision agriculture has become a globally attractive topic. As one of the most important factors, the soil nutrients play an important role in estimating the development of precision agriculture. Detecting the content of nitrogen, phosphorus and potassium (NPK) elements more efficiently...
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MDPI AG
2016-08-01
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| Series: | Sensors |
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| Online Access: | http://www.mdpi.com/1424-8220/16/8/1234 |
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doaj-d5c57fe1db8f4beb86d8815d9e5980512020-11-24T21:50:01ZengMDPI AGSensors1424-82202016-08-01168123410.3390/s16081234s16081234A Miniaturized On-Chip Colorimeter for Detecting NPK ElementsRui-Tao Liu0Lu-Qi Tao1Bo Liu2Xiang-Guang Tian3Mohammad Ali Mohammad4Yi Yang5Tian-Ling Ren6Institute of Microelectronics, Tsinghua University, Beijing 100084, ChinaInstitute of Microelectronics, Tsinghua University, Beijing 100084, ChinaInstitute of Microelectronics, Tsinghua University, Beijing 100084, ChinaInstitute of Microelectronics, Tsinghua University, Beijing 100084, ChinaInstitute of Microelectronics, Tsinghua University, Beijing 100084, ChinaInstitute of Microelectronics, Tsinghua University, Beijing 100084, ChinaInstitute of Microelectronics, Tsinghua University, Beijing 100084, ChinaRecently, precision agriculture has become a globally attractive topic. As one of the most important factors, the soil nutrients play an important role in estimating the development of precision agriculture. Detecting the content of nitrogen, phosphorus and potassium (NPK) elements more efficiently is one of the key issues. In this paper, a novel chip-level colorimeter was fabricated to detect the NPK elements for the first time. A light source–microchannel photodetector in a sandwich structure was designed to realize on-chip detection. Compared with a commercial colorimeter, all key parts are based on MEMS (Micro-Electro-Mechanical System) technology so that the volume of this on-chip colorimeter can be minimized. Besides, less error and high precision are achieved. The cost of this colorimeter is two orders of magnitude less than that of a commercial one. All these advantages enable a low-cost and high-precision sensing operation in a monitoring network. The colorimeter developed herein has bright prospects for environmental and biological applications.http://www.mdpi.com/1424-8220/16/8/1234colorimeterNPK elementsBeer-Lambert’s Law |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
Rui-Tao Liu Lu-Qi Tao Bo Liu Xiang-Guang Tian Mohammad Ali Mohammad Yi Yang Tian-Ling Ren |
| spellingShingle |
Rui-Tao Liu Lu-Qi Tao Bo Liu Xiang-Guang Tian Mohammad Ali Mohammad Yi Yang Tian-Ling Ren A Miniaturized On-Chip Colorimeter for Detecting NPK Elements Sensors colorimeter NPK elements Beer-Lambert’s Law |
| author_facet |
Rui-Tao Liu Lu-Qi Tao Bo Liu Xiang-Guang Tian Mohammad Ali Mohammad Yi Yang Tian-Ling Ren |
| author_sort |
Rui-Tao Liu |
| title |
A Miniaturized On-Chip Colorimeter for Detecting NPK Elements |
| title_short |
A Miniaturized On-Chip Colorimeter for Detecting NPK Elements |
| title_full |
A Miniaturized On-Chip Colorimeter for Detecting NPK Elements |
| title_fullStr |
A Miniaturized On-Chip Colorimeter for Detecting NPK Elements |
| title_full_unstemmed |
A Miniaturized On-Chip Colorimeter for Detecting NPK Elements |
| title_sort |
miniaturized on-chip colorimeter for detecting npk elements |
| publisher |
MDPI AG |
| series |
Sensors |
| issn |
1424-8220 |
| publishDate |
2016-08-01 |
| description |
Recently, precision agriculture has become a globally attractive topic. As one of the most important factors, the soil nutrients play an important role in estimating the development of precision agriculture. Detecting the content of nitrogen, phosphorus and potassium (NPK) elements more efficiently is one of the key issues. In this paper, a novel chip-level colorimeter was fabricated to detect the NPK elements for the first time. A light source–microchannel photodetector in a sandwich structure was designed to realize on-chip detection. Compared with a commercial colorimeter, all key parts are based on MEMS (Micro-Electro-Mechanical System) technology so that the volume of this on-chip colorimeter can be minimized. Besides, less error and high precision are achieved. The cost of this colorimeter is two orders of magnitude less than that of a commercial one. All these advantages enable a low-cost and high-precision sensing operation in a monitoring network. The colorimeter developed herein has bright prospects for environmental and biological applications. |
| topic |
colorimeter NPK elements Beer-Lambert’s Law |
| url |
http://www.mdpi.com/1424-8220/16/8/1234 |
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