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植物生理生态仪?/a>
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SMT100土壤温湿度传感器是德国TRUEBNERS公司生产的一款低成本、高质量传感器,其原理是利用环形振荡器将信号的传输时间转换为测量频率,产生的频率>100MHz足以在粘性土壤中正常工作。SMT100结合了低成本FDR传感器的优点和TDR传感器的精度。与TDR一样,它测量信号的传播时间,以确定土壤的介电常数,像FDR一样,它把介电常数转换成一个易于测量的频率。提供SDI-12、RS485?-10V和Modbus多种输出方式,可满足广大客户的需求、/span>
应用范围9/span>
气象、农业、土壤、温室、植物秸秆水分测量、土壤侵蚀、堆肥水分测量、积雪水分温度测量、土木绿化、多元化灌溉等领埞/span>
技术指标:
水分范围9/span>0-60% VWC'/span>Max?00百分VWC(/span>
分辨率:0.1% VWC或者更髗/span>
精度9/span>3%VWC工厂校准@?-50%VWC矿物土盐刅/span>~8ds/m
1%VWC@土壤特定校准
温度范围9/span>-40~+80
分辨率:0.01ℂ/span>
精度:典垊/span>0.2℃@-20~+50℃; 其它0.4ℂ/span>
介电常数9/span>1(空气)~80(水(/p>
分辨率:0.01
响应时间9/span>50us
供电9/span>4-24V DC
电流9/span>40mA
信号输出:数字:RS485?/span>Modbus?/span>SDI-12
模拟:0 - 10 V
线缆长度9/span>10m
尺寸9/span>18.2 cm x 3 cm x 1.2 cm
Characteristics of the three types of soil moisture sensors used in the SOMOMOUNT network. All values in the table are provided by the manufacturers (Delta-T Devices 2008; IMKO 2015; Truebner 2016).
Aragones J. L. MacDowell L. G. and Vega C.: Di-electric Constant of Ices and Water: A Lesson about Water Interactions J. Phys. Chem. A 115 5745?758+/p>
2011.
Barthlott C. Hauck C. Schaedler G. Kalthoff N. and Kottmeier,C.: Soil moisture impacts on convective indices and pre- cipitation over complex terrain Meteorol. Z. 20 185?97+/p>
2011.
Beltrami H.: Active layer distortion of annual air soil thermal orbits Permafrost Periglac. 7 101?10 (SICI)1099- 1530(199604)7:2<101::aid-ppp217>3.3.CO;2-3 1996.
Beringer J. Lynch A. H. Chapin F. S. Mack M. and Bonan G. B.: The Representation of Arctic Soils in
the Land Surface Model: The Importance of Mosses J. Climate 14 3324?335 0442(2001)014<3324:troasi>2.0.CO;2 2001.
Bircher S. Skou N. Jensen K. H. Walker J. P. and Rasmussen L.: A soil moisture and temperature network for SMOS valida- tion in Western Denmark Hydrol. Earth Syst. Sci. 16 1445 1463 2012.
Bogena H. R. Herbst M. Huisman J. A. Rosenbaum U. Weuthen A. and Vereecken H.: Potential of Wireless Sensor Networks for Measuring Soil Water Content Variability Vadose Zone J. 9 1002?013 2010.
Bogena H. R. Huisman J. A. Schilling B. Weuthen A. and Vereecken H.: Effective Calibration of Low-
Cost Soil Water Content Sensors Sensors 17 208+/p>
2017.
Boike J. Wille C. and Abnizova A.: Climatology and sum- mer energy and water balance of polygonal tundra in the Lena River Delta Siberia J. Geophys. Res-Biogeo. 113 G03025+/p>
2008.
Borga M. Boscolo P. Zanon F. and Sangati M.: Hydrom- eteorological Analysis of the 29 August 2003 Flash Flood in the Eastern Italian Alps J. Hydrometeorol. 8 1049?067+/p>
2007.
Brocca L. Morbidelli R. Melone F. and Moramarco T.: Soil moisture spatial variability in experimen-
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