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生物網(wǎng)口流量計（Flow Meter） 數(shù)字流量計訂購指南： 438 110    數(shù)字流量計（Digital Flow Meter）                 用來測量通過浮游生物網(wǎng)的水的體積                 5位機械式計數(shù)器                 葉輪直徑：75mm                 便捷的單點連接或雙點連接                 水平拖網(wǎng)使用 438 115    數(shù)字流量計（Digital Flow Meter）                 用來測量通過浮游生物網(wǎng)的水的體積                 5位機械式計數(shù)器                 葉輪直徑：75mm                 便捷的三點連接                 垂直拖網(wǎng)使用                 帶逆行自動停止功能 代表文獻： 1.D. Schnack,1974.On the Reliability of Methods for Quantitative Surveys of Fish Larvae.The Early Life History of Fish.201-212. 2.S. Falk-Petersen ａnd C.C.E. Hopkins,1981.Ecological investigations on the zooplankton community of Balsfjorden, northern Norway: population dynamics of the euphausiids Thysanoessa inermis （Kröyer）, Thysanoessa raschii （M.Sars） ａnd Meganyctiphanes norvegica （M.Sars） in 1976 ａnd 1977.Journal of Plankton Research.3（2）: 177-192. 3.J. Lenz, D. Schnack, D. Petersen, J. Kreikemeier, B. Hermann, S. Mees ａnd K. Wieland,1995.The Ichthyoplankton Recorder: A video recording system for in situ studies of small-scale plankton distribution patterns.ICES Journal of Marine Science.52（3-4）:409-417. 4.A. Vandelannoote, H. Robberecht, H. Deelstra, F. Vyumvuhore, L. Bitetera, F. Ollevier,1996.The impact of the River Ntahangwa, the most polluted Burundian affluent of Lake Tanganyika, on the water quality of the lake.Hydrobiologia.328（2）:161-171. 5.Epaminondas D. Christou,1998.Interannual variability of copepods in a Mediterranean coastal area （Saronikos Gulf, Aegean Sea）.Journal of Marine Systems.15（1–4）:523–532. 6.A. Vandelannoote, H. Deelstra, F. Ollevier,1999.The inflow of the Rusizi River to Lake Tanganyika.Hydrobiologia.407（0）:65-73. 7.PEDERSEN L., JENSEN H. M., BURMEISTER A., HANSEN B. W.,1999.The significance of food web structure for the condition ａnd tracer lipid content of juvenile snail fish （Pisces : Liparis spp.） along 65-72°N off West Greenland.Journal of Plankton Research.21（9）:1593-1611. 8.H. Wennhage, L. Pihl,2001.Settlement patterns of newly settLED plaice （Pleuronectes platessa） in a non-tidal Swedish fjord in relation to larval supply ａnd benthic predators.Marine Biology.139（5）:877-889. 9.S. M. Moser, D. J. Macintosh,2001.Diurnal ａnd lunar patterns of larval recruitment of Brachyura into a mangrove estuary system in Ranong Province, Thailand.Marine Biology.138（4）:827-841. 10.Peter Beeck, Sandra Tauber, Stephanie Kiel, Jost Borcherding,2002.0+ perch predation on 0+ bream: a case study in a eutrophic gravel pit lake.Freshwater Biology.47（12）:2359–2369. 11.Olafur S. Astthorsson ａnd Astthor Gislason,2003.Seasonal variations in abundance, development ａnd vertical distribution of Calanus finmarchicus, C. hyperboreus ａnd C. glacialis in the East Icelandic Current.Journal of Plankton Research.25（7）:843-854. 12.A.M.P. Santosa, A. Peliza, J. Dubertb, P.B. Oliveiraa, M.M. Angélicoa, P. Réc,2004.Impact of a winter upwelling event on the distribution ａnd transport of sardine （Sardina pilchardus） eggs ａnd larvae off western Iberia: a retention mechanism.Continental Shelf Research.24（2）:149–165. 13.J.Hein M. van Lieverlooa, Dick W. Bosboomb, Geo L. Bakkerc, Anke J. Brouwera, Remko Voogta, Josje E.M. De Roosd,2004.Sampling ａnd quantifying invertebrates from drinking water distribution mains.Water Research.38（5）:1101–1112. 14.Chih-hao Hsieh, Chih-Shin Chen, Tai-Sheng Chiu,2005.Composition ａnd abundance of copepods ａnd ichthyoplankton in Taiwan Strait （western North Pacific） are influenced by seasonal monsoons.Marine ａnd Freshwater Research.56（2）:153–161. 15.Kwee Siong Tew, Wen-Tseng Lo,2005.Distribution of Thaliacea in SW Taiwan coastal water in 1997, with special reference to Doliolum denticulatum, Thalia democratica ａnd T. orientalis.Marine Ecology Progress Series.292:181-193. 16.Tien-Hsi Fang, Jiang-Shiou Hwang, Shih-Hui Hsiao, Hung-Yu Chen,2006.Trace metals in seawater ａnd copepods in the ocean outfall area off the northern Taiwan coast.Marine Environmental Research.61（2）:224–243. 17.E. Gaard, A. Gislason, T. Falkenhaug, H. Søiland, E. Musaeva, A. Vereshchaka, G. Vinogradov,2008.Horizontal ａnd vertical copepod distribution ａnd abundance on the Mid-Atlantic Ridge in June 2004.Deep Sea Research Part II: Topical Studies in Oceanography.55（1–2）:59–71. 18.Peter Thor1, Torkel Gissel Nielsen, Peter Tiselius,2008.Mortality rates of epipelagic copepods in the post-spring bloom period in Disko Bay, western Greenland.Marine Ecology Progress Series.359:151-160. 19.Cesar Vilas, Pilar Drake, Emilio Pascual,2009.Inter- ａnd intra-specific differences in euryhalinity determine the spatial distribution of mysids in a temperate European estuary.Journal of Experimental Marine Biology ａnd Ecology.369（2）:165–176. 20.Enrique González-Ortegón, José A. Cuesta, Emilio Pascual, Pilar Drake,2010.Assessment of the interaction between the white shrimp, Palaemon longirostris, ａnd the exotic oriental shrimp, Palaemon macrodactylus, in a European estuary （SW Spain）.Biological Invasions.12（6）:1731-1745. 21.Kesarkar, K.S., Anil, A.C.,2010.New species of Paracalanidae along the west coast of India: Paracalanus arabiensis.Journal of the Marine Biological Association of the United Kingdom.90（2）:399-408. 22.Iskender Gülle, Ismail Ibrahim Turna, Salim Serkan Güçlü, Pinar Gülle, Zekiye Güçlü,2010.Zooplankton Seasonal Abundance ａnd Vertical Distribution of Highly Alkaline Lake Burdur, Turkey.Turkish Journal of Fisheries ａnd Aquatic Sciences.10:245-254. 23.Mianrun Chen, Bingzhang Chen, Paul Harrison, Hongbin Liu,2011.Dynamics of mesozooplankton assemblages in subtropical coastal waters of Hong Kong: A comparative study between a eutrophic estuarine ａnd a mesotrophic coastal site.Continental Shelf Research.31（10）:1075–1086. 24.Min-Chul Jang, Kyoungsoon Shin, Bonggil Hyun, Tongsup Lee ａnd Keun-Hyung Choi,2013.Temperature-regulated egg production rate, ａnd seasonal ａnd interannual variations in Paracalanus parvus.Journal of Plankton Research.doi: 10.1093/plankt/fbt050.  

測量原理：

　　電磁流量傳感器是基于法拉第電磁感應(yīng)定律而制成的，只是其中切割磁力線的導(dǎo)體不是一般的金屬而是具有一定電導(dǎo)率的液態(tài)流體或液固兩相流體。被測量的導(dǎo)電介質(zhì)在磁場中作切割磁力線運動時，導(dǎo)電介質(zhì)中會產(chǎn)生感應(yīng)電動勢，感應(yīng)電動勢由一對電極檢測，該電壓信號VE可用下式表示：