{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,1]],"date-time":"2026-02-01T06:17:41Z","timestamp":1769926661243,"version":"3.49.0"},"reference-count":116,"publisher":"Hindawi Limited","license":[{"start":{"date-parts":[[2015,1,1]],"date-time":"2015-01-01T00:00:00Z","timestamp":1420070400000},"content-version":"unspecified","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/3.0\/"}],"funder":[{"DOI":"10.13039\/501100012326","name":"Key Program for International S&T Cooperation Projects of China","doi-asserted-by":"crossref","award":["2013DFA11320"],"award-info":[{"award-number":["2013DFA11320"]}],"id":[{"id":"10.13039\/501100012326","id-type":"DOI","asserted-by":"crossref"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Journal of Sensors"],"published-print":{"date-parts":[[2015]]},"abstract":"<jats:p>Chlorophyll fluorescence measurement is a sensitive and effective method to quantify and analyze freshwater and sea water phytoplankton<jats:italic>in situ<\/jats:italic>. Major improvements in optical design, electronic technology, and calibration protocol have increased the accuracy and reliability of the fluorometer. This review briefly describes the improvement of probe design, excitation light sources, detectors, and calibrations of<jats:italic>in situ<\/jats:italic>fluorometers. Firstly, various optical designs for increasing the efficiency of fluorescence measurement are discussed. Next, the development of electronic technology to meet and improve<jats:italic>in situ<\/jats:italic>measurement, including various light sources, detectors, and corresponding measurement protocols, is described. In addition, various calibration materials, procedures, and methods are recommended for different kinds of water. The conclusion discusses key trends and future perspectives for<jats:italic>in situ<\/jats:italic>fluorescence sensors.<\/jats:p>","DOI":"10.1155\/2015\/903509","type":"journal-article","created":{"date-parts":[[2015,4,30]],"date-time":"2015-04-30T21:04:46Z","timestamp":1430427886000},"page":"1-16","source":"Crossref","is-referenced-by-count":47,"title":["Development of<i>In Situ<\/i>Sensors for Chlorophyll Concentration Measurement"],"prefix":"10.1155","volume":"2015","author":[{"given":"Lihua","family":"Zeng","sequence":"first","affiliation":[{"name":"Key Laboratory of Agricultural Information Acquisition Technology, Ministry of Agriculture, Beijing 100083, China"},{"name":"College of Mechanical and Electrical Engineering, Agricultural University of Hebei, Baoding 071001, China"}]},{"given":"Daoliang","family":"Li","sequence":"additional","affiliation":[{"name":"Key Laboratory of Agricultural Information Acquisition Technology, Ministry of Agriculture, Beijing 100083, 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